一、更新小夥伴 @大齡Giser 提出好點子:試試VS的插件擴展:VSIX、ItemProject等,將T4模板給製做插件,這裏先記下,有懂的小夥伴能夠本身先試試,我會在之後更新。html
二、感謝小夥伴 @博客園董事長 的測試和指正,本文 T4 模板已經支持 Oraclemysql
三、再次感謝小夥伴 @大齡Giser 關於 使用VSIX+ProjectTemplate建立項目模板,提供開源支持:http://www.javashuo.com/article/p-knswooks-bx.htmlc++
四、感謝羣小夥伴 @jamee1696 提供技術支持,本文 T4 模板已經支持 Mysqlgit
五、若是感受 Blog.Core.Framework 層比較笨重,我單寫了一個簡單的生成框架文件的接口,能夠查看 DbFirstController.cs 【推薦使用】github
哈嘍你們週二好呀,這個國慶過的真是懶洋洋呀,不知道你們的學習動力咋樣了,剛一上班本人手中的項目也增長了,可是仍是要抽出時間學習噠,爲了避免讓老闆大大每天催,因此更新會慢點兒 [ 哭笑 ] :bowtie:,不過在個人推薦下,公司下一個項目要我負責先後端分離,終於能夠將這些派上用場了,中間的坑也會在之後的文章中,慢慢補充出來。sql
這幾天簡單想了想,尚未想好要開什麼系列,就想到QQ羣裏有小夥伴問的較多的一些問題以及前邊系列文章中的提到的,可是沒有深刻講到的,再填一下坑,這樣纔是完整的嘛,你們要是看到以前的有任何不清楚的,或者想擴展的,能夠在羣裏說一下,或者留言,我都會說到的。今天呢,就說說若是半自動化搭建項目,這個坑來自於以前的項目搭建文章《框架之六 || API項目總體搭建 6.1 倉儲模式》的伏筆之一 —— 如何使用 T4 模板搭建項目。固然,咱們不只是簡單說說實體類的建立,也會橫向和縱向的討論下,一個項目如何經過代碼實現半自動化搭建。數據庫
說到這裏你們應該已經明白了這篇文章的寫做意圖,就是搭建項目的問題,相信你們已經開發了幾年了,都有本身的一套行之有效的辦法或者是經驗,固然這裏就不說付費的了,付費的框架何其多,好比迪西客,普元或者力軟等等,這都是好用的功能強大的付費框架,既然說技術,就不說付費的,我們本身寫,這裏簡單歸納下今天要說到的:windows
0、手動粘貼複製 —— 可能如今還有小夥伴在用這個辦法,效率是真的很低,雖然我偶爾也用哈哈,這裏就不說了後端
一、動軟代碼生成器 —— 這個我入門的時候使用的神器,用了很久服務器
二、經過 VSTO 來編寫 Excel ,實現每一層的代碼設計 —— 我沒用過,可是見過,一個不錯的思路
三、T4 模板 —— 這個是我這兩年遇到的又一個神器,也是一直使用的,強烈推薦的
四、SqlSuagr(ORM)—— 自封裝的一套邏輯,固然其餘ORM也有,好比EF就很好
五、VSIX 擴展插件 —— 新的處理方案
今天我們這幾個方法都會說到,主要仍是說一下經過 T4 模板,來把咱們的總體框架半自動化起來。最終的效果截圖是這樣的:
框架截圖
相信不少的小夥伴應該使用過這個工具,仍是很不錯的,我也是用了有一段時間,雖然很小,可是功能確實很豐富,不管是生成實體類,仍是生成簡單三層,仍是工廠模式等等,均可以使用,不只支持單個表文件的操做,也支持整個數據庫的批量生成,這裏具體的不作敘述,由於不是本篇文章的重點,這裏簡單的說下使用方法以及效果圖:
地址:http://www.maticsoft.com/download.aspx
安裝仍是很簡單的,就是普通的 next ,想用的能夠試試,這裏就不作敘述了。
安裝成功後,咱們能夠看到,經過鏈接相應的服務器,找到適當的數據庫,就能夠操做了,主要仍是經過一套 cmt 模板來生成對應的 .cs 類文件,這些模板咱們可使用系統自帶的(好比工廠模式模板),也能夠自定義編輯,以知足咱們不一樣項目的具體需求,我這裏就演示下,如何把個人博客數據庫(仍是我們一直用的這個數據庫),生成簡單工程框架。
通過短暫的等待後,咱們的所有框架就這麼出來了
固然這些後綴名等均可以配置,這裏就不細說了,我們隨便看一下數據訪問層的內容:
/** 版本信息模板在安裝目錄下,可自行修改。 * BlogArticle.cs * * 功 能: N/A * 類 名: BlogArticle * * Ver 變動日期 負責人 變動內容 * ─────────────────────────────────── * V0.01 2018/10/8 23:46:56 N/A 第一版 * * Copyright (c) 2012 Maticsoft Corporation. All rights reserved. *┌──────────────────────────────────┐ *│ 此技術信息爲本公司機密信息,未經本公司書面贊成禁止向第三方披露. │ *│ 版權全部:動軟卓越(北京)科技有限公司 │ *└──────────────────────────────────┘ */ using System; using System.Data; using System.Text; using System.Data.SqlClient; using Maticsoft.IDAL; using Maticsoft.DBUtility;//Please add references namespace Maticsoft.SQLServerDAL { /// <summary> /// 數據訪問類:BlogArticle /// </summary> public partial class BlogArticle:IBlogArticle { public BlogArticle() {} #region BasicMethod /// <summary> /// 獲得最大ID /// </summary> public int GetMaxId() { return DbHelperSQL.GetMaxID("bID", "BlogArticle"); } /// <summary> /// 是否存在該記錄 /// </summary> public bool Exists(int bID) { StringBuilder strSql=new StringBuilder(); strSql.Append("select count(1) from BlogArticle"); strSql.Append(" where bID=@bID"); SqlParameter[] parameters = { new SqlParameter("@bID", SqlDbType.Int,4) }; parameters[0].Value = bID; return DbHelperSQL.Exists(strSql.ToString(),parameters); } /// <summary> /// 增長一條數據 /// </summary> public int Add(Maticsoft.Model.BlogArticle model) { StringBuilder strSql=new StringBuilder(); strSql.Append("insert into BlogArticle("); strSql.Append("bsubmitter,btitle,bcategory,bcontent,btraffic,bcommentNum,bUpdateTime,bCreateTime,bRemark)"); strSql.Append(" values ("); strSql.Append("@bsubmitter,@btitle,@bcategory,@bcontent,@btraffic,@bcommentNum,@bUpdateTime,@bCreateTime,@bRemark)"); strSql.Append(";select @@IDENTITY"); SqlParameter[] parameters = { new SqlParameter("@bsubmitter", SqlDbType.NVarChar,60), new SqlParameter("@btitle", SqlDbType.NVarChar,256), new SqlParameter("@bcategory", SqlDbType.NVarChar,-1), new SqlParameter("@bcontent", SqlDbType.Text), new SqlParameter("@btraffic", SqlDbType.Int,4), new SqlParameter("@bcommentNum", SqlDbType.Int,4), new SqlParameter("@bUpdateTime", SqlDbType.DateTime), new SqlParameter("@bCreateTime", SqlDbType.DateTime), new SqlParameter("@bRemark", SqlDbType.NVarChar,-1)}; parameters[0].Value = model.bsubmitter; parameters[1].Value = model.btitle; parameters[2].Value = model.bcategory; parameters[3].Value = model.bcontent; parameters[4].Value = model.btraffic; parameters[5].Value = model.bcommentNum; parameters[6].Value = model.bUpdateTime; parameters[7].Value = model.bCreateTime; parameters[8].Value = model.bRemark; object obj = DbHelperSQL.GetSingle(strSql.ToString(),parameters); if (obj == null) { return 0; } else { return Convert.ToInt32(obj); } } /// <summary> /// 更新一條數據 /// </summary> public bool Update(Maticsoft.Model.BlogArticle model) { StringBuilder strSql=new StringBuilder(); strSql.Append("update BlogArticle set "); strSql.Append("bsubmitter=@bsubmitter,"); strSql.Append("btitle=@btitle,"); strSql.Append("bcategory=@bcategory,"); strSql.Append("bcontent=@bcontent,"); strSql.Append("btraffic=@btraffic,"); strSql.Append("bcommentNum=@bcommentNum,"); strSql.Append("bUpdateTime=@bUpdateTime,"); strSql.Append("bCreateTime=@bCreateTime,"); strSql.Append("bRemark=@bRemark"); strSql.Append(" where bID=@bID"); SqlParameter[] parameters = { new SqlParameter("@bsubmitter", SqlDbType.NVarChar,60), new SqlParameter("@btitle", SqlDbType.NVarChar,256), new SqlParameter("@bcategory", SqlDbType.NVarChar,-1), new SqlParameter("@bcontent", SqlDbType.Text), new SqlParameter("@btraffic", SqlDbType.Int,4), new SqlParameter("@bcommentNum", SqlDbType.Int,4), new SqlParameter("@bUpdateTime", SqlDbType.DateTime), new SqlParameter("@bCreateTime", SqlDbType.DateTime), new SqlParameter("@bRemark", SqlDbType.NVarChar,-1), new SqlParameter("@bID", SqlDbType.Int,4)}; parameters[0].Value = model.bsubmitter; parameters[1].Value = model.btitle; parameters[2].Value = model.bcategory; parameters[3].Value = model.bcontent; parameters[4].Value = model.btraffic; parameters[5].Value = model.bcommentNum; parameters[6].Value = model.bUpdateTime; parameters[7].Value = model.bCreateTime; parameters[8].Value = model.bRemark; parameters[9].Value = model.bID; int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters); if (rows > 0) { return true; } else { return false; } } /// <summary> /// 刪除一條數據 /// </summary> public bool Delete(int bID) { StringBuilder strSql=new StringBuilder(); strSql.Append("delete from BlogArticle "); strSql.Append(" where bID=@bID"); SqlParameter[] parameters = { new SqlParameter("@bID", SqlDbType.Int,4) }; parameters[0].Value = bID; int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters); if (rows > 0) { return true; } else { return false; } } /// <summary> /// 批量刪除數據 /// </summary> public bool DeleteList(string bIDlist ) { StringBuilder strSql=new StringBuilder(); strSql.Append("delete from BlogArticle "); strSql.Append(" where bID in ("+bIDlist + ") "); int rows=DbHelperSQL.ExecuteSql(strSql.ToString()); if (rows > 0) { return true; } else { return false; } } /// <summary> /// 獲得一個對象實體 /// </summary> public Maticsoft.Model.BlogArticle GetModel(int bID) { StringBuilder strSql=new StringBuilder(); strSql.Append("select top 1 bID,bsubmitter,btitle,bcategory,bcontent,btraffic,bcommentNum,bUpdateTime,bCreateTime,bRemark from BlogArticle "); strSql.Append(" where bID=@bID"); SqlParameter[] parameters = { new SqlParameter("@bID", SqlDbType.Int,4) }; parameters[0].Value = bID; Maticsoft.Model.BlogArticle model=new Maticsoft.Model.BlogArticle(); DataSet ds=DbHelperSQL.Query(strSql.ToString(),parameters); if(ds.Tables[0].Rows.Count>0) { return DataRowToModel(ds.Tables[0].Rows[0]); } else { return null; } } /// <summary> /// 獲得一個對象實體 /// </summary> public Maticsoft.Model.BlogArticle DataRowToModel(DataRow row) { Maticsoft.Model.BlogArticle model=new Maticsoft.Model.BlogArticle(); if (row != null) { if(row["bID"]!=null && row["bID"].ToString()!="") { model.bID=int.Parse(row["bID"].ToString()); } if(row["bsubmitter"]!=null) { model.bsubmitter=row["bsubmitter"].ToString(); } if(row["btitle"]!=null) { model.btitle=row["btitle"].ToString(); } if(row["bcategory"]!=null) { model.bcategory=row["bcategory"].ToString(); } if(row["bcontent"]!=null) { model.bcontent=row["bcontent"].ToString(); } if(row["btraffic"]!=null && row["btraffic"].ToString()!="") { model.btraffic=int.Parse(row["btraffic"].ToString()); } if(row["bcommentNum"]!=null && row["bcommentNum"].ToString()!="") { model.bcommentNum=int.Parse(row["bcommentNum"].ToString()); } if(row["bUpdateTime"]!=null && row["bUpdateTime"].ToString()!="") { model.bUpdateTime=DateTime.Parse(row["bUpdateTime"].ToString()); } if(row["bCreateTime"]!=null && row["bCreateTime"].ToString()!="") { model.bCreateTime=DateTime.Parse(row["bCreateTime"].ToString()); } if(row["bRemark"]!=null) { model.bRemark=row["bRemark"].ToString(); } } return model; } /// <summary> /// 得到數據列表 /// </summary> public DataSet GetList(string strWhere) { StringBuilder strSql=new StringBuilder(); strSql.Append("select bID,bsubmitter,btitle,bcategory,bcontent,btraffic,bcommentNum,bUpdateTime,bCreateTime,bRemark "); strSql.Append(" FROM BlogArticle "); if(strWhere.Trim()!="") { strSql.Append(" where "+strWhere); } return DbHelperSQL.Query(strSql.ToString()); } /// <summary> /// 得到前幾行數據 /// </summary> public DataSet GetList(int Top,string strWhere,string filedOrder) { StringBuilder strSql=new StringBuilder(); strSql.Append("select "); if(Top>0) { strSql.Append(" top "+Top.ToString()); } strSql.Append(" bID,bsubmitter,btitle,bcategory,bcontent,btraffic,bcommentNum,bUpdateTime,bCreateTime,bRemark "); strSql.Append(" FROM BlogArticle "); if(strWhere.Trim()!="") { strSql.Append(" where "+strWhere); } strSql.Append(" order by " + filedOrder); return DbHelperSQL.Query(strSql.ToString()); } /// <summary> /// 獲取記錄總數 /// </summary> public int GetRecordCount(string strWhere) { StringBuilder strSql=new StringBuilder(); strSql.Append("select count(1) FROM BlogArticle "); if(strWhere.Trim()!="") { strSql.Append(" where "+strWhere); } object obj = DbHelperSQL.GetSingle(strSql.ToString()); if (obj == null) { return 0; } else { return Convert.ToInt32(obj); } } /// <summary> /// 分頁獲取數據列表 /// </summary> public DataSet GetListByPage(string strWhere, string orderby, int startIndex, int endIndex) { StringBuilder strSql=new StringBuilder(); strSql.Append("SELECT * FROM ( "); strSql.Append(" SELECT ROW_NUMBER() OVER ("); if (!string.IsNullOrEmpty(orderby.Trim())) { strSql.Append("order by T." + orderby ); } else { strSql.Append("order by T.bID desc"); } strSql.Append(")AS Row, T.* from BlogArticle T "); if (!string.IsNullOrEmpty(strWhere.Trim())) { strSql.Append(" WHERE " + strWhere); } strSql.Append(" ) TT"); strSql.AppendFormat(" WHERE TT.Row between {0} and {1}", startIndex, endIndex); return DbHelperSQL.Query(strSql.ToString()); } /* /// <summary> /// 分頁獲取數據列表 /// </summary> public DataSet GetList(int PageSize,int PageIndex,string strWhere) { SqlParameter[] parameters = { new SqlParameter("@tblName", SqlDbType.VarChar, 255), new SqlParameter("@fldName", SqlDbType.VarChar, 255), new SqlParameter("@PageSize", SqlDbType.Int), new SqlParameter("@PageIndex", SqlDbType.Int), new SqlParameter("@IsReCount", SqlDbType.Bit), new SqlParameter("@OrderType", SqlDbType.Bit), new SqlParameter("@strWhere", SqlDbType.VarChar,1000), }; parameters[0].Value = "BlogArticle"; parameters[1].Value = "bID"; parameters[2].Value = PageSize; parameters[3].Value = PageIndex; parameters[4].Value = 0; parameters[5].Value = 0; parameters[6].Value = strWhere; return DbHelperSQL.RunProcedure("UP_GetRecordByPage",parameters,"ds"); }*/ #endregion BasicMethod #region ExtensionMethod #endregion ExtensionMethod } }
提示:若是你不想下載該軟件,又想看看具體的代碼,我已經提交到我們的git 了,在wwwroot 文件夾中,你們能夠看看
截圖
打開看一下,基本的 CURD 方法都有,也有一些存儲過程的調用等,並且能夠自定義擴展,不得不說是一個神器,若是要開發 ADO.NET 多層,這個方法也不失爲一個好的方案。
優勢你們都看到了,快速,內容簡潔豐富,各類存儲過程分頁方法很方便,不言而喻;
可是缺點也是有的,最大的就是不能像其餘ORM框架那樣,實現 Code First ,只能單純的講數據庫信息提取出來;並且在編輯模板方面也沒有 T4 那麼容易操做,修改模板代碼不是很方便,學習的難度稍微大了一些。
總結:若是不想用 T4 模板手動寫模板代碼,又不想引入框架,只想用 ADO.NET 搭建多層框架,動軟代碼生成器是一個不錯的選擇。
VSTO(Visual Studio Tools For Office)就像名字同樣,是Visual Studio開發Office的工具集。只是一套工具,用於簡化.NET的Office開發。可以生成com組件或者標準dll的都能開發Office,好比c/c++,VB6,Delphi等等。原生.NET固然也能夠。微軟以爲.net開發Office不夠方便,VSTO便誕生了。
1.決定要用.NET開發Office
2.在全部.NET開發Office的途徑(原始,各類工具)中,選擇了VSTO
網上有一個栗子,你們能夠參看着本身玩一玩:http://www.javashuo.com/article/p-melniarj-w.html。 對於這個方法,你們本身玩一玩就行了,這裏就不說具體的教程了,畢竟不是本文重點。
QQ羣裏有一個小夥伴大神,他經過 VSTO 來寫的一個框架,其實就是經過命令來將固定的格式進行輸出,這裏盜用一下他的圖,應該還好吧,由於不知道他的博客園帳號,就先不@他了,我的感受這個仍是很不錯的,看着很溜
這個方法我如今也在學,不過只是作一個知識擴展來用,好處是,咱們本身作一個Excel 工具後,走到哪裏均可以使用,還很方便,本身隨便自定義,不用受項目或者數據庫的環境影響,特別是作展現的時候,很直觀,好比開項目研討會的時候,幾我的討論數據庫表結構呀,生成的方法呀,總不能一個個軟件都打開吧;
可是也有一些問題,畢竟侷限性有些強,好比好像不能直接操做數據庫,在大數據結構中,效率不高,並且不能直接生成文件,須要拷貝操做等;
經過上邊兩個栗子能夠看出來,一個是鏈接數據庫快捷,文件生成方便;一個自定義邏輯性強,展現直觀,那有沒有辦法能夠將兩個優勢結合起來呢,沒錯,就是T4模板了,耐心看完下邊的講解,你會發現很強大。
由於有不少小夥伴問到了這個工具,再經得做者贊成之後(做者地址https://github.com/DevilX5,給大神點 Star !),拿到了工具和Code,有須要的小夥伴能夠玩一玩:
工具:https://files.cnblogs.com/files/laozhang-is-phi/DxAddIn.rar
Github:https://github.com/DevilX5/DxAddIn
工具使用很簡單,下載解壓後,就是執行下這個文件,就會在你的Excel中,添加這個服務
你會在你的Excel中發現這個服務:
具體的操做,能夠按照上邊做者的動圖來操做。
T4 (Text Template Transformation Toolkit) 是微軟官方在 VisualStudio 2008+ 中開始使用的代碼生成引擎。在 Visual Studio 中,「T4 文本模板」是由一些文本塊和控制邏輯組成的混合模板,它能夠生成文本文件。 在 Visual C# 或 Visual Basic 中,控制邏輯編寫爲程序代碼的片斷。生成的文件能夠是任何類型的文本,例如網頁、資源文件或任何語言的程序源代碼。如今的VS中只要與代碼生成相關的場景基本上都能找T4的身影,好比MVC的視圖模板,Entity Framwork的DataContext模板等等。
這裏就不具體講解 T4 語法了,你們能夠自行學習,其實很簡單,主要仍是 C# 代碼,下邊你看過以後就能懂了,我們首先先實現以前留下的一個伏筆 —— 將咱們的數據庫表利用T4 模板生成實體類,也就是 DbFirst。
一、首先在咱們的項目中,新建一個類庫 Blog.Core.FrameWork
二、在該類庫下,新建文件夾 Blog.Core.FrameWork.Entity,用於單獨存放咱們的模板以及生成的實體類文件
三、在類庫的根目錄新建 ModelAuto.ttinclude 模板文件,用來控制咱們的文件生成配置
能夠直接新建一個文本文檔,而後重命名便可
提示:初始狀態下,代碼不是高亮的,你們能夠安裝插件:下載地址,不過我的感受並非很好用。
//引入命名空間 <#@ assembly name="System.Core"#> <#@ assembly name="EnvDTE"#> <#@ import namespace="System.Collections.Generic"#> <#@ import namespace="System.IO"#> <#@ import namespace="System.Text"#> <#@ import namespace="Microsoft.VisualStudio.TextTemplating"#> <#+ //定義管理者 manager 實體類 class Manager { //定義一個 block 塊,主要是應用在批量生產中 public struct Block { public String Name; public int Start, Length; } public List<Block> blocks = new List<Block>(); public Block currentBlock; public Block footerBlock = new Block(); public Block headerBlock = new Block(); public ITextTemplatingEngineHost host; public ManagementStrategy strategy; public StringBuilder template; public String OutputPath { get; set; } //構造函數,包含 host主機,模板,輸出路徑,建立管理策略 public Manager(ITextTemplatingEngineHost host, StringBuilder template, bool commonHeader) { this.host = host; this.template = template; OutputPath = String.Empty; strategy = ManagementStrategy.Create(host); } //開闢一個 block 塊 public void StartBlock(String name) { currentBlock = new Block { Name = name, Start = template.Length }; } public void StartFooter() { footerBlock.Start = template.Length; } public void EndFooter() { footerBlock.Length = template.Length - footerBlock.Start; } public void StartHeader() { headerBlock.Start = template.Length; } public void EndHeader() { headerBlock.Length = template.Length - headerBlock.Start; } public void EndBlock() { currentBlock.Length = template.Length - currentBlock.Start; blocks.Add(currentBlock); } //定義進程,用來將全部的 blocks 塊執行出來 public void Process(bool split) { String header = template.ToString(headerBlock.Start, headerBlock.Length); String footer = template.ToString(footerBlock.Start, footerBlock.Length); blocks.Reverse(); foreach(Block block in blocks) {//遍歷 //輸出文件 String fileName = Path.Combine(OutputPath, block.Name); if (split) { String content = header + template.ToString(block.Start, block.Length) + footer; strategy.CreateFile(fileName, content); template.Remove(block.Start, block.Length); } else { strategy.DeleteFile(fileName); } } } } //定義管理策略類 class ManagementStrategy { internal static ManagementStrategy Create(ITextTemplatingEngineHost host) { return (host is IServiceProvider) ? new VSManagementStrategy(host) : new ManagementStrategy(host); } internal ManagementStrategy(ITextTemplatingEngineHost host) { } internal virtual void CreateFile(String fileName, String content) { File.WriteAllText(fileName, content); } internal virtual void DeleteFile(String fileName) { if (File.Exists(fileName)) File.Delete(fileName); } } class VSManagementStrategy : ManagementStrategy { private EnvDTE.ProjectItem templateProjectItem; internal VSManagementStrategy(ITextTemplatingEngineHost host) : base(host) { IServiceProvider hostServiceProvider = (IServiceProvider)host; if (hostServiceProvider == null) throw new ArgumentNullException("Could not obtain hostServiceProvider"); EnvDTE.DTE dte = (EnvDTE.DTE)hostServiceProvider.GetService(typeof(EnvDTE.DTE)); if (dte == null) throw new ArgumentNullException("Could not obtain DTE from host"); templateProjectItem = dte.Solution.FindProjectItem(host.TemplateFile); } //建立文件 internal override void CreateFile(String fileName, String content) { base.CreateFile(fileName, content); ((EventHandler)delegate { templateProjectItem.ProjectItems.AddFromFile(fileName); }).BeginInvoke(null, null, null, null); } //刪除文件 internal override void DeleteFile(String fileName) { ((EventHandler)delegate { FindAndDeleteFile(fileName); }).BeginInvoke(null, null, null, null); } //根據文件名刪除文件 private void FindAndDeleteFile(String fileName) { foreach(EnvDTE.ProjectItem projectItem in templateProjectItem.ProjectItems) { if (projectItem.get_FileNames(0) == fileName) { projectItem.Delete(); return; } } } }#>
四、仍是在類庫根目錄下新建 DbHelper.ttinclude 模板,主要是數據庫操做類
<#+ class DbHelper { #region 獲取數據庫表結構 public static List<DbTable> GetDbTables(string connectionString, string database, string tables = null) { if (!string.IsNullOrEmpty(tables)) { tables = string.Format(" and obj.name in ('{0}')", tables.Replace(",", "','")); } #region 執行sql命令 string sql = string.Format(@"SELECT obj.name tablename, schem.name schemname, idx.rows, CAST ( CASE WHEN (SELECT COUNT(1) FROM sys.indexes WHERE object_id= obj.OBJECT_ID AND is_primary_key=1) >=1 THEN 1 ELSE 0 END AS BIT) HasPrimaryKey from {0}.sys.objects obj inner join {0}.dbo.sysindexes idx on obj.object_id=idx.id and idx.indid<=1 INNER JOIN {0}.sys.schemas schem ON obj.schema_id=schem.schema_id where type='U' {1} order by obj.name", database, tables); #endregion DataTable dt = GetDataTable(connectionString, sql); return dt.Rows.Cast<DataRow>().Select(row => new DbTable { TableName = row.Field<string>("tablename"), SchemaName = row.Field<string>("schemname"), Rows = row.Field<int>("rows"), HasPrimaryKey = row.Field<bool>("HasPrimaryKey") }).ToList(); } #endregion #region 獲取表字段信息 public static List<DbColumn> GetDbColumns(string connectionString, string database, string tableName, string schema = "dbo") { #region 執行sql命令 string sql = string.Format(@" WITH indexCTE AS ( SELECT ic.column_id, ic.index_column_id, ic.object_id FROM {0}.sys.indexes idx INNER JOIN {0}.sys.index_columns ic ON idx.index_id = ic.index_id AND idx.object_id = ic.object_id WHERE idx.object_id =OBJECT_ID(@tableName) AND idx.is_primary_key=1 ) select colm.column_id ColumnID, CAST(CASE WHEN indexCTE.column_id IS NULL THEN 0 ELSE 1 END AS BIT) IsPrimaryKey, colm.name ColumnName, systype.name ColumnType, colm.is_identity IsIdentity, colm.is_nullable IsNullable, cast(colm.max_length as int) ByteLength, ( case when systype.name='nvarchar' and colm.max_length>0 then colm.max_length/2 when systype.name='nchar' and colm.max_length>0 then colm.max_length/2 when systype.name='ntext' and colm.max_length>0 then colm.max_length/2 else colm.max_length end ) CharLength, cast(colm.precision as int) Precision, cast(colm.scale as int) Scale, prop.value Remark from {0}.sys.columns colm inner join {0}.sys.types systype on colm.system_type_id=systype.system_type_id and colm.user_type_id=systype.user_type_id left join {0}.sys.extended_properties prop on colm.object_id=prop.major_id and colm.column_id=prop.minor_id LEFT JOIN indexCTE ON colm.column_id=indexCTE.column_id AND colm.object_id=indexCTE.object_id where colm.object_id=OBJECT_ID(@tableName) order by colm.column_id", database); #endregion SqlParameter param = new SqlParameter("@tableName", SqlDbType.NVarChar, 100) { Value = string.Format("{0}.{1}.{2}", database, schema, tableName) }; DataTable dt = GetDataTable(connectionString, sql, param); return dt.Rows.Cast<DataRow>().Select(row => new DbColumn() { ColumnID = row.Field<int>("ColumnID"), IsPrimaryKey = row.Field<bool>("IsPrimaryKey"), ColumnName = row.Field<string>("ColumnName"), ColumnType = row.Field<string>("ColumnType"), IsIdentity = row.Field<bool>("IsIdentity"), IsNullable = row.Field<bool>("IsNullable"), ByteLength = row.Field<int>("ByteLength"), CharLength = row.Field<int>("CharLength"), Scale = row.Field<int>("Scale"), Remark = row["Remark"].ToString() }).ToList(); } #endregion #region 獲取 DataTable public static DataTable GetDataTable(string connectionString, string commandText, params SqlParameter[] parms) { using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = connection.CreateCommand(); command.CommandText = commandText; command.Parameters.AddRange(parms); SqlDataAdapter adapter = new SqlDataAdapter(command); DataTable dt = new DataTable(); adapter.Fill(dt); return dt; } } #endregion #region 獲取主鍵 public static string GetPrimaryKey(List<DbColumn> dbColumns) { string primaryKey = string.Empty; if (dbColumns!=null&&dbColumns.Count>0) { foreach (var item in dbColumns) { if (item.IsPrimaryKey==true) { primaryKey = item.ColumnName; } } } return primaryKey; } #endregion } class DbTable { /// <summary> /// 表名稱 /// </summary> public string TableName { get; set; } /// <summary> /// 表的架構 /// </summary> public string SchemaName { get; set; } /// <summary> /// 表的記錄數 /// </summary> public int Rows { get; set; } /// <summary> /// 是否含有主鍵 /// </summary> public bool HasPrimaryKey { get; set; } } class DbColumn { /// <summary> /// 字段ID /// </summary> public int ColumnID { get; set; } /// <summary> /// 是否主鍵 /// </summary> public bool IsPrimaryKey { get; set; } /// <summary> /// 字段名稱 /// </summary> public string ColumnName { get; set; } /// <summary> /// 字段類型 /// </summary> public string ColumnType { get; set; } /// <summary> /// 數據庫類型對應的C#類型 /// </summary> public string CSharpType { get { return SqlServerDbTypeMap.MapCsharpType(ColumnType); } } /// <summary> /// /// </summary> public Type CommonType { get { return SqlServerDbTypeMap.MapCommonType(ColumnType); } } /// <summary> /// 字節長度 /// </summary> public int ByteLength { get; set; } /// <summary> /// 字符長度 /// </summary> public int CharLength { get; set; } /// <summary> /// 小數位 /// </summary> public int Scale { get; set; } /// <summary> /// 是否自增列 /// </summary> public bool IsIdentity { get; set; } /// <summary> /// 是否容許空 /// </summary> public bool IsNullable { get; set; } /// <summary> /// 描述 /// </summary> public string Remark { get; set; } } class SqlServerDbTypeMap { public static string MapCsharpType(string dbtype) { if (string.IsNullOrEmpty(dbtype)) return dbtype; dbtype = dbtype.ToLower(); string csharpType = "object"; switch (dbtype) { case "bigint": csharpType = "long"; break; case "binary": csharpType = "byte[]"; break; case "bit": csharpType = "bool"; break; case "char": csharpType = "string"; break; case "date": csharpType = "DateTime"; break; case "datetime": csharpType = "DateTime"; break; case "datetime2": csharpType = "DateTime"; break; case "datetimeoffset": csharpType = "DateTimeOffset"; break; case "decimal": csharpType = "decimal"; break; case "float": csharpType = "double"; break; case "image": csharpType = "byte[]"; break; case "int": csharpType = "int"; break; case "money": csharpType = "decimal"; break; case "nchar": csharpType = "string"; break; case "ntext": csharpType = "string"; break; case "numeric": csharpType = "decimal"; break; case "nvarchar": csharpType = "string"; break; case "real": csharpType = "Single"; break; case "smalldatetime": csharpType = "DateTime"; break; case "smallint": csharpType = "short"; break; case "smallmoney": csharpType = "decimal"; break; case "sql_variant": csharpType = "object"; break; case "sysname": csharpType = "object"; break; case "text": csharpType = "string"; break; case "time": csharpType = "TimeSpan"; break; case "timestamp": csharpType = "byte[]"; break; case "tinyint": csharpType = "byte"; break; case "uniqueidentifier": csharpType = "Guid"; break; case "varbinary": csharpType = "byte[]"; break; case "varchar": csharpType = "string"; break; case "xml": csharpType = "string"; break; default: csharpType = "object"; break; } return csharpType; } public static Type MapCommonType(string dbtype) { if (string.IsNullOrEmpty(dbtype)) return Type.Missing.GetType(); dbtype = dbtype.ToLower(); Type commonType = typeof(object); switch (dbtype) { case "bigint": commonType = typeof(long); break; case "binary": commonType = typeof(byte[]); break; case "bit": commonType = typeof(bool); break; case "char": commonType = typeof(string); break; case "date": commonType = typeof(DateTime); break; case "datetime": commonType = typeof(DateTime); break; case "datetime2": commonType = typeof(DateTime); break; case "datetimeoffset": commonType = typeof(DateTimeOffset); break; case "decimal": commonType = typeof(decimal); break; case "float": commonType = typeof(double); break; case "image": commonType = typeof(byte[]); break; case "int": commonType = typeof(int); break; case "money": commonType = typeof(decimal); break; case "nchar": commonType = typeof(string); break; case "ntext": commonType = typeof(string); break; case "numeric": commonType = typeof(decimal); break; case "nvarchar": commonType = typeof(string); break; case "real": commonType = typeof(Single); break; case "smalldatetime": commonType = typeof(DateTime); break; case "smallint": commonType = typeof(short); break; case "smallmoney": commonType = typeof(decimal); break; case "sql_variant": commonType = typeof(object); break; case "sysname": commonType = typeof(object); break; case "text": commonType = typeof(string); break; case "time": commonType = typeof(TimeSpan); break; case "timestamp": commonType = typeof(byte[]); break; case "tinyint": commonType = typeof(byte); break; case "uniqueidentifier": commonType = typeof(Guid); break; case "varbinary": commonType = typeof(byte[]); break; case "varchar": commonType = typeof(string); break; case "xml": commonType = typeof(string); break; default: commonType = typeof(object); break; } return commonType; } } class config { //public static readonly string ConnectionString = "Data Source=.;Initial Catalog=WMBlogDB;User ID=sa;Password=666;"; public static readonly string ConnectionString = File.ReadAllText(@"D:\my-file\dbCountPsw2.txt").Trim(); public static readonly string DbDatabase = ""; public static readonly string TableName = ""; }#>
具體的代碼就不細講了,直接拷貝,或者下載我寫好的代碼便可。再次說明下,本文不會對 T4 語法繼續深刻研究。
五、實現生成所有實體類的模型設計,在Blog.Core.FrameWork.Entity文件夾下,新建 Blog.Core.FrameWork.Entity.tt 模板
填寫代碼
//若是要獲取主機信息,記得把 hostspecific 設置成true <#@ template debug="false" hostspecific="True" language="C#" #> <#@ output extension=".cs" #> //導入命名空間組件 <#@ assembly name="System.Data" #> <#@ assembly name="System.xml" #> <#@ import namespace="System.Collections.Generic" #> <#@ import namespace="System.Data.SqlClient" #> <#@ import namespace="System.Data" #> <#@ assembly name="System.Core.dll" #> <#@ assembly name="System.Data.DataSetExtensions.dll" #> <#@ import namespace="System" #> <#@ import namespace="System.Xml" #> <#@ import namespace="System.Linq" #> <#@ import namespace="System.Collections.Generic" #> <#@ import namespace="System.IO" #> //引入咱們的公共模板文件 <#@ include file="$(ProjectDir)DbHelper.ttinclude" #> <#@ include file="$(ProjectDir)ModelAuto.ttinclude" #> //定義咱們的輸出文件夾 <# var OutputPath1 = Path.GetDirectoryName(Host.TemplateFile)+"\\work"; if (!Directory.Exists(OutputPath1)) { Directory.CreateDirectory(OutputPath1); } var manager = new Manager(Host, GenerationEnvironment, true) { OutputPath = OutputPath1 }; #> //-------------------------------------------------------------------- // 此代碼由T4模板自動生成 // 老張的哲學 生成時間 <#=DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")#> // 注意更新後會改變相應代碼。 //-------------------------------------------------------------------- <# var tableName=config.TableName;//獲取config配置中的表名,爲單一輩子產使用 #> <# if(tableName!=""){//若是表名有值,表示是生成單一文件 #> //引用命名空間 using System; namespace Blog.Core.FrameWork.Entity { /// <summary> /// <#=tableName#> /// </summary> public class <#=tableName#>//能夠在這裏加上基類等 { //將所有字段遍歷出來 <# foreach(DbColumn column in DbHelper.GetDbColumns(config.ConnectionString, config.DbDatabase, config.TableName)){#> public <#= column.CSharpType#><# if(column.CommonType.IsValueType && column.IsNullable){#>?<#}#> <#=column.ColumnName#> { get; set; } <#}#> } } //若是爲空,表示要將整個數據庫都生成出來 <# } else{ #> //鏈接數據庫,打開 connect 鏈接 <# SqlConnection conn = new SqlConnection(config.ConnectionString); conn.Open(); System.Data.DataTable schema = conn.GetSchema("TABLES"); #> //遍歷所有數據庫表 <# foreach(System.Data.DataRow row in schema.Rows) { #> //開始啓動block塊,參數是實體類文件名 <# manager.StartBlock(row["TABLE_NAME"]+".cs"); #> //----------<#=row["TABLE_NAME"].ToString()#>開始---------- using System; namespace Blog.Core.FrameWork.Entity { /// <summary> /// <#=tableName#> /// </summary> public class <#=row["TABLE_NAME"].ToString()#>//能夠在這裏加上基類等 { //將該表下的字段都遍歷出來,能夠自定義獲取數據描述等信息 <# foreach(DbColumn column in DbHelper.GetDbColumns(config.ConnectionString, config.DbDatabase, row["TABLE_NAME"].ToString() )){ #> public <#= column.CSharpType#> <# if(column.CommonType.IsValueType && column.IsNullable){#> ?<#}#> <#=column.ColumnName #> { get; set; } <#}#> } } //----------<#=row["TABLE_NAME"].ToString()#>結束---------- <# manager.EndBlock(); } manager.Process(true); } #>
這裏我寫的比較凌亂,大概就是這個邏輯,其實和 C# 特別相像,主要簡單的看一看,就都會明白,這個時候咱們保存文件 ctrl+S,若是你鏈接數據庫正確的話,會發現已經生成了所有實體類文件。
隨便打開一個實體類,就能夠發現,和咱們本身寫的是同樣的:是否是很方便!
//----------BlogArticle開始---------- using System; namespace Blog.Core.FrameWork.Entity { /// <summary> /// BlogArticle /// </summary> public class BlogArticle//能夠在這裏加上基類等 { //將該表下的字段都遍歷出來,能夠自定義獲取數據描述等信息 public int bID { get; set; } public string bsubmitter { get; set; } public string btitle { get; set; } public string bcategory { get; set; } public string bcontent { get; set; } public int btraffic { get; set; } public int bcommentNum { get; set; } public DateTime bUpdateTime { get; set; } public DateTime bCreateTime { get; set; } public string bRemark { get; set; } } } //----------BlogArticle結束----------
這個時候你會問,這個既然這麼好,能所有生成其餘層麼?沒錯,答案固然是確定的!
由於篇幅的問題,這裏就不把代碼粘貼出來了,你們本身去Github 上獲取便可,最終的效果是醬紫的:
是否是很神奇!整個系統框架就在一瞬間就加載出來了,你們下載好後,只須要 ctrl + S 保存一下 tt 模板文件,就能所有生成,只須要把精力放到 Base 基類/基接口便可,之後數據庫表結構不管如何變化都不怕!
注意:上邊是整個項目都生成出來了,也成功的產生了 work 文件夾下,看似一切很天然,可是不當心就遇到了其餘的問題:
咱們打開 DbHelper.ttinclude 模板的最下邊:
public static readonly string ConnectionString = File.Exists(@"D:\my-file\dbCountPsw2.txt") ? File.ReadAllText(@"D:\my-file\dbCountPsw2.txt").Trim(): "server=.;uid=sa;pwd=sa;database=WMBlogDB"; public static readonly string DbDatabase = ""; public static readonly string TableName = "";//單獨生成一個表
就是上邊,剛剛咱們生成整個庫的時候,這裏是空的,若是如今填寫了一個代表,好比 BlogArticle ,好吧,work 文件夾有了,可是沒有生成指定的 cs 文件類,尷尬,而後就懷疑有 bug,
這個時候請打開 Blog.Core.FrameWork.tt 研究下生成的邏輯代碼,簡單的 if else:
這裏只有 Model 層的,其餘的自行復制便可。
ModelAuto.ttinclude ,
<#@ assembly name="System.Core"#> <#@ assembly name="EnvDTE"#> <#@ import namespace="System.Collections.Generic"#> <#@ import namespace="System.IO"#> <#@ import namespace="System.Text"#> <#@ import namespace="Microsoft.VisualStudio.TextTemplating"#> <#+ class Manager { public struct Block { public String Name; public int Start, Length; } public List<Block> blocks = new List<Block>(); public Block currentBlock; public Block footerBlock = new Block(); public Block headerBlock = new Block(); public ITextTemplatingEngineHost host; public ManagementStrategy strategy; public StringBuilder template; public String OutputPath { get; set; } public Manager(ITextTemplatingEngineHost host, StringBuilder template, bool commonHeader) { this.host = host; this.template = template; OutputPath = String.Empty; strategy = ManagementStrategy.Create(host); } public void StartBlock(String name) { currentBlock = new Block { Name = name, Start = template.Length }; } public void StartFooter() { footerBlock.Start = template.Length; } public void EndFooter() { footerBlock.Length = template.Length - footerBlock.Start; } public void StartHeader() { headerBlock.Start = template.Length; } public void EndHeader() { headerBlock.Length = template.Length - headerBlock.Start; } public void EndBlock() { currentBlock.Length = template.Length - currentBlock.Start; blocks.Add(currentBlock); } public void Process(bool split) { String header = template.ToString(headerBlock.Start, headerBlock.Length); String footer = template.ToString(footerBlock.Start, footerBlock.Length); blocks.Reverse(); foreach(Block block in blocks) { String fileName = Path.Combine(OutputPath, block.Name); if (split) { String content = header + template.ToString(block.Start, block.Length) + footer; strategy.CreateFile(fileName, content); template.Remove(block.Start, block.Length); } else { strategy.DeleteFile(fileName); } } } } class ManagementStrategy { internal static ManagementStrategy Create(ITextTemplatingEngineHost host) { return (host is IServiceProvider) ? new VSManagementStrategy(host) : new ManagementStrategy(host); } internal ManagementStrategy(ITextTemplatingEngineHost host) { } internal virtual void CreateFile(String fileName, String content) { File.WriteAllText(fileName, content); } internal virtual void DeleteFile(String fileName) { if (File.Exists(fileName)) File.Delete(fileName); } } class VSManagementStrategy : ManagementStrategy { private EnvDTE.ProjectItem templateProjectItem; internal VSManagementStrategy(ITextTemplatingEngineHost host) : base(host) { IServiceProvider hostServiceProvider = (IServiceProvider)host; if (hostServiceProvider == null) throw new ArgumentNullException("Could not obtain hostServiceProvider"); EnvDTE.DTE dte = (EnvDTE.DTE)hostServiceProvider.GetService(typeof(EnvDTE.DTE)); if (dte == null) throw new ArgumentNullException("Could not obtain DTE from host"); templateProjectItem = dte.Solution.FindProjectItem(host.TemplateFile); } internal override void CreateFile(String fileName, String content) { base.CreateFile(fileName, content); ((EventHandler)delegate { templateProjectItem.ProjectItems.AddFromFile(fileName); }).BeginInvoke(null, null, null, null); } internal override void DeleteFile(String fileName) { ((EventHandler)delegate { FindAndDeleteFile(fileName); }).BeginInvoke(null, null, null, null); } private void FindAndDeleteFile(String fileName) { foreach(EnvDTE.ProjectItem projectItem in templateProjectItem.ProjectItems) { if (projectItem.get_FileNames(0) == fileName) { projectItem.Delete(); return; } } } }#>
生成 model 層 的代碼
感謝小夥伴 @博客園董事長的測試和指正,如下代碼正確,能夠成功導出 Oracle,
<#@ template debug="true" hostspecific="true" language="C#" #> <#@ output extension=".cs" #> <#@ assembly name="System.Data" #> <#@ assembly name="System.Data.OracleClient" #> <#@ assembly name="System.Xml" #> <#@ import namespace="System" #> <#@ import namespace="System.Xml" #> <#@ import namespace="System.Data" #> <#@ import namespace="System.Data.OracleClient" #> <#@ import namespace="System.Collections.Generic"#> <#@ include file="$(ProjectDir)ModelAuto.ttinclude" #> <# var manager2 = new Manager(Host, GenerationEnvironment, true) { OutputPath = Path.GetDirectoryName(Host.TemplateFile)}; #> <# ModelManager manager = new ModelManager(); List<string> list=manager.GetTableList(); #> <# foreach (var item in list) { string tableName=item; DataTable table= manager.GetTableSchema(tableName); #> <# manager2.StartBlock(tableName+".cs"); #> using System; using System.Data; using System.Data.OracleClient; namespace Model { /// <summary> /// 數據表實體類:<#= tableName #> /// </summary> [Serializable()] public class <#= tableName #> { <# foreach(DataRow row in table.Rows) { #> /// <summary> /// <#=row["備註"]#> /// </summary> public <#= manager.TransFromSqlType(row["數據類型"].ToString())#> <#=row["字段名"]#>{ get; set; } <#} #> } } <# manager2.EndBlock(); #> <# } #> <# manager2.Process(true); #> <#+ public class ModelManager { /// <summary> /// 數據庫鏈接字符串 /// </summary> private const string CONNECTION_STRING = "Data Source=orcl;Persist Security Info=True;User ID=jjmis;Password=jjmis;Unicode=True"; /// <summary> /// 用戶信息表名 /// </summary> private const string PERSONINFO_TABLE_NAME = "USERINFO"; /// <summary> /// 根據表名查詢表結構信息 /// </summary> private const string SELECT_SCHEMA_BY_TABLE_NAME = @"SELECT A.column_name 字段名, A.data_type 數據類型, A.data_length 長度, A.data_precision 整數位, A.Data_Scale 小數位, A.nullable 容許空值, A.Data_default 缺省值, B.comments 備註, A.TABLE_NAME 表名 FROM user_tab_columns A, user_col_comments B WHERE a.COLUMN_NAME = b.column_name AND A.Table_Name = B.Table_Name AND A.Table_Name = '{0}'"; /// <summary> /// 得到數據鏈接 /// </summary> /// <returns></returns> private OracleConnection GetConnection() { return new OracleConnection(CONNECTION_STRING); } /// <summary> /// 獲得當前用戶的全部表名 /// </summary> /// <returns></returns> public List<string> GetTableList() { string sql = "SELECT * FROM USER_TABLES"; DataTable dt = OracleHelper.ExecuteDataTable(sql); List<string> list = new List<string>(); if (dt!=null&&dt.Rows.Count>0) { for (int i = 0; i < dt.Rows.Count; i++) { list.Add(dt.Rows[i]["TABLE_NAME"].ToString()); } } return list; } /// <summary> /// 釋放鏈接 /// </summary> /// <param name="con"></param> private void ReleaseConnection(OracleConnection con) { if (con != null) { if (con.State == ConnectionState.Open) { con.Close(); } } } public DataTable GetTableSchema(string tableName) { DataTable dt; using (OracleConnection con = GetConnection()) { con.Open(); OracleCommand cmd = con.CreateCommand(); cmd.CommandText = string.Format(SELECT_SCHEMA_BY_TABLE_NAME,tableName); cmd.CommandType = CommandType.Text; OracleDataAdapter adapter = new OracleDataAdapter(cmd); DataSet ds = new DataSet(); adapter.Fill(ds); dt = ds.Tables[0]; } return dt; } /// <summary> /// SQL[不完善,須要的本身改造] /// </summary> /// <param name="type"></param> /// <returns></returns> public string TransFromSqlType(string type) { if (string.IsNullOrEmpty(type)) { return string.Empty; } if (string.Equals(type, "number", StringComparison.OrdinalIgnoreCase)) { return "int"; } if (string.Equals(type, "date", StringComparison.OrdinalIgnoreCase)) { return "DateTime"; } else if (string.Equals(type, "nvarchar2", StringComparison.OrdinalIgnoreCase)) { return "string"; } return "string"; } } #> <#+ public class OracleHelper { private static string oracleConnectionStr = "Data Source=orcl;Persist Security Info=True;User ID=jjmis;Password=jjmis;Unicode=True"; public static DataTable ExecuteDataTable(string sql, params OracleParameter[] paramList) { using (OracleConnection conn = new OracleConnection(oracleConnectionStr)) { conn.Open(); using (OracleCommand command = conn.CreateCommand()) { command.CommandText = sql; command.Parameters.AddRange(paramList); DataTable dt = new DataTable(); OracleDataAdapter adapter = new OracleDataAdapter(command); adapter.Fill(dt); return dt; } } } public static int ExecuteNonQuery(string sql, params OracleParameter[] paramList) { using (OracleConnection conn = new OracleConnection(oracleConnectionStr)) { conn.Open(); using (OracleCommand command = conn.CreateCommand()) { command.CommandText = sql; command.Parameters.AddRange(paramList); return command.ExecuteNonQuery(); } } } public static object ExecuteScalar(string sql, params OracleParameter[] paramList) { using (OracleConnection conn = new OracleConnection(oracleConnectionStr)) { conn.Open(); using (OracleCommand command = conn.CreateCommand()) { command.CommandText = sql; command.Parameters.AddRange(paramList); return command.ExecuteScalar(); } } } } #>
一、若是MySQL要生成大寫的話,須要在my.ini中添加 lower_case_table_names=2,讓mysql區分大小寫,生成出來的就跟所設置的表名,字段名同樣了,默認mysql在windows下不區分大小寫。
二、能夠看看下邊評論區 吉喆吉 博友的意見。
對應的 Mysql 的 ModelAuto.ttinclude 內容:
//引入命名空間 <#@ assembly name="System.Core"#> <#@ assembly name="EnvDTE"#> <#@ import namespace="System.Collections.Generic"#> <#@ import namespace="System.IO"#> <#@ import namespace="System.Text"#> <#@ import namespace="Microsoft.VisualStudio.TextTemplating"#> <#+ //定義管理者 manager 實體類 class Manager { //定義一個 block 塊,主要是應用在批量生產中 public struct Block { public String Name; public int Start, Length; } public List<Block> blocks = new List<Block>(); public Block currentBlock; public Block footerBlock = new Block(); public Block headerBlock = new Block(); public ITextTemplatingEngineHost host; public ManagementStrategy strategy; public StringBuilder template; public String OutputPath { get; set; } //構造函數,包含 host主機,模板,輸出路徑,建立管理策略 public Manager(ITextTemplatingEngineHost host, StringBuilder template, bool commonHeader) { this.host = host; this.template = template; OutputPath = String.Empty; strategy = ManagementStrategy.Create(host); } //開闢一個 block 塊 public void StartBlock(String name) { currentBlock = new Block { Name = name, Start = template.Length }; } public void StartFooter() { footerBlock.Start = template.Length; } public void EndFooter() { footerBlock.Length = template.Length - footerBlock.Start; } public void StartHeader() { headerBlock.Start = template.Length; } public void EndHeader() { headerBlock.Length = template.Length - headerBlock.Start; } public void EndBlock() { currentBlock.Length = template.Length - currentBlock.Start; blocks.Add(currentBlock); } //定義進程,用來將全部的 blocks 塊執行出來 public void Process(bool split) { String header = template.ToString(headerBlock.Start, headerBlock.Length); String footer = template.ToString(footerBlock.Start, footerBlock.Length); blocks.Reverse(); foreach(Block block in blocks) {//遍歷 //輸出文件 String fileName = Path.Combine(OutputPath, block.Name); if (split) { String content = header + template.ToString(block.Start, block.Length) + footer; strategy.CreateFile(fileName, content); template.Remove(block.Start, block.Length); } else { strategy.DeleteFile(fileName); } } } } //定義管理策略類 class ManagementStrategy { internal static ManagementStrategy Create(ITextTemplatingEngineHost host) { return (host is IServiceProvider) ? new VSManagementStrategy(host) : new ManagementStrategy(host); } internal ManagementStrategy(ITextTemplatingEngineHost host) { } internal virtual void CreateFile(String fileName, String content) { File.WriteAllText(fileName, content); } internal virtual void DeleteFile(String fileName) { if (File.Exists(fileName)) File.Delete(fileName); } } class VSManagementStrategy : ManagementStrategy { private EnvDTE.ProjectItem templateProjectItem; internal VSManagementStrategy(ITextTemplatingEngineHost host) : base(host) { IServiceProvider hostServiceProvider = (IServiceProvider)host; if (hostServiceProvider == null) throw new ArgumentNullException("Could not obtain hostServiceProvider"); EnvDTE.DTE dte = (EnvDTE.DTE)hostServiceProvider.GetService(typeof(EnvDTE.DTE)); if (dte == null) throw new ArgumentNullException("Could not obtain DTE from host"); templateProjectItem = dte.Solution.FindProjectItem(host.TemplateFile); } //建立文件 internal override void CreateFile(String fileName, String content) { base.CreateFile(fileName, content); ((EventHandler)delegate { templateProjectItem.ProjectItems.AddFromFile(fileName); }).BeginInvoke(null, null, null, null); } //刪除文件 internal override void DeleteFile(String fileName) { ((EventHandler)delegate { FindAndDeleteFile(fileName); }).BeginInvoke(null, null, null, null); } //根據文件名刪除文件 private void FindAndDeleteFile(String fileName) { foreach(EnvDTE.ProjectItem projectItem in templateProjectItem.ProjectItems) { if (projectItem.get_FileNames(0) == fileName) { projectItem.Delete(); return; } } } }#>
對應的 Mysql 的 MySqlHelper.ttinclude 內容:
<#+ public class EntityHelper { public static List<Entity> GetEntities(string connectionString, List<string> databases) { var list = new List<Entity>(); var conn = new MySqlConnection(connectionString); try { conn.Open(); var dbs = string.Join("','", databases.ToArray()); var cmd = string.Format(@"SELECT `information_schema`.`COLUMNS`.`TABLE_SCHEMA` ,`information_schema`.`COLUMNS`.`TABLE_NAME` ,`information_schema`.`COLUMNS`.`COLUMN_NAME` ,`information_schema`.`COLUMNS`.`DATA_TYPE` ,`information_schema`.`COLUMNS`.`COLUMN_COMMENT` FROM `information_schema`.`COLUMNS` WHERE `information_schema`.`COLUMNS`.`TABLE_SCHEMA` IN ('{0}') ", dbs); using (var reader = MySqlHelper.ExecuteReader(conn, cmd)) { while (reader.Read()) { var db = reader["TABLE_SCHEMA"].ToString(); var table = reader["TABLE_NAME"].ToString(); var column = reader["COLUMN_NAME"].ToString(); var type = reader["DATA_TYPE"].ToString(); var comment = reader["COLUMN_COMMENT"].ToString(); var entity = list.FirstOrDefault(x => x.EntityName == table); if(entity == null) { entity = new Entity(table); entity.Fields.Add(new Field { Name = column, Type = GetCLRType(type), Comment = comment }); list.Add(entity); } else { entity.Fields.Add(new Field { Name = column, Type = GetCLRType(type), Comment = comment }); } } } } finally { conn.Close(); } return list; } public static string GetCLRType(string dbType) { switch(dbType) { case "tinyint": case "smallint": case "mediumint": case "int": case "integer": return "int"; case "double": return "double"; case "float": return "float"; case "decimal": return "decimal"; case "numeric": case "real": return "decimal"; case "bit": return "bool"; case "date": case "time": case "year": case "datetime": case "timestamp": return "DateTime"; case "tinyblob": case "blob": case "mediumblob": case "longblog": case "binary": case "varbinary": return "byte[]"; case "char": case "varchar": case "tinytext": case "text": case "mediumtext": case "longtext": return "string"; case "point": case "linestring": case "polygon": case "geometry": case "multipoint": case "multilinestring": case "multipolygon": case "geometrycollection": case "enum": case "set": default: return dbType; } } } public class Entity { public Entity() { this.Fields = new List<Field>(); } public Entity(string name) : this() { this.EntityName = name; } public string EntityName { get;set; } public List<Field> Fields { get;set; } } public class Field { public string Name { get;set; } public string Type { get;set; } public string Comment { get;set; } } class config { public static readonly string ConnectionString = "Database=appsoft;Data Source=127.0.0.1;User Id=root;Password=123456;pooling=false;CharSet=utf8;port=3306"; public static readonly string DbDatabase = ""; public static readonly string TableName = ""; public static readonly string ModelNameSpace = "App.Entities"; public static readonly string IRepositoryNameSpace = "App.IRepository"; public static readonly string RepositoryNameSpace = "App.Repository"; public static readonly string IServicesNameSpace = "App.IServices"; public static readonly string ServicesNameSpace = "App.Services"; }#>
具體的Demo項目詳情,能夠下載:https://files.cnblogs.com/files/laozhang-is-phi/App.T4.MySql.rar
一、<#@ assembly name="C:\Users\youga\.nuget\packages\mysql.data\8.0.14\lib\net452\MySql.Data.dll" #> 修改成你的引用;
二、MySqlHelper.ttinclude 修改ConnectionString變量;
三、App.Entities.tt 修改connectionString變量;
四、能夠根據本身的需求修改T4模板;
五、生成的類名都是小寫,能否轉化爲帕斯卡命名規範(待解決);
通常的ORM都會有這個功能,不管是Code First ,仍是根據數據庫DB來生成 .cs 實體類,個人項目用的是Sqlsugar,因此也封裝了響應的方法,
具體代碼,能夠參考 blog.core層下的 Controllers / DbFirst / DbFirstController.cs 文件,裏邊有對Repository、IRepository、Service、IService、Model層的自動生成接口,
代碼很簡單,看看就好了。
今天也是在忙碌中,抽出時間寫了寫,主要是給你們分享了下,如何快速的半自動化的實現項目搭建,也算是一個小技巧了,重點說明了下 T4模板搭建所有層文件,我的感受仍是可行的,主要是靈活性很強,須要的小夥伴能夠好好的研究一下,繼續奮鬥中!!!
感謝羣內大神提供開源資料: