SQL Server編程系列(2):SMO經常使用對象的有關操做

在上一篇周公簡單講述了SMO的一些基本概念，實際上SMO體系結構遠不止周公在上一篇中講述的那麼簡單，下圖是MSDN上給出的一個完整的結構圖：

上圖是一個完整的涉及到各類關係的結構圖。不過它們之間的層次結構關係周公已經在上一篇作了簡單概述。

在本篇中周公仍是在上一篇的基礎上再作稍微深刻一點的介紹，在本篇中主要講述如何獲取數據庫常見對象信息，而且如何利用SMO來進行一些平常操做：如建立Login，建立數據庫、備份數據庫和還原數據庫。執行上面這些操做的SQL語句也許咱們已經寫過，下面咱們來看看利用SMO來操做的代碼將如何寫。

代碼以下：

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SqlServer.Management.Smo.RegisteredServers;//在microsoft.sqlserver.smo.dll中
using Microsoft.SqlServer.Management.Smo;//需添加microsoft.sqlserver.smo.dll的引用
using Microsoft.SqlServer.Management.Common;//需添加microsoft.sqlserver.connectioninfo.dll的引用
namespace SSISStudy
{
    /// <summary>
    /// SQL Server編程些列文章(2):SMO經常使用對象的有關操做
    /// 做者：周公
    /// 建立日期：2012-05-23
    /// 博客地址：http://blog.csdn.net/zhoufoxcn http://zhoufoxcn.blog.51cto.com
    /// 新浪微博地址：http://weibo.com/zhoufoxcn
    class SMODemo02
    {
        /// <summary>
        /// 顯示數據庫常見對象信息示例
        /// </summary>
        public static void ShowSMOObjects()
        {
            Console.WriteLine("Server Group Information");
            foreach (ServerGroup serverGroup in SmoApplication.SqlServerRegistrations.ServerGroups)
            {
                Console.WriteLine("Group Name:{0},Path:{1},ServerType:{2},State:{3},Urn:{4}", serverGroup.Name, serverGroup.Path, serverGroup.ServerType, serverGroup.State, serverGroup.Urn);
            }
            Console.WriteLine("Registered Server Information");
            foreach (RegisteredServer regServer in SmoApplication.SqlServerRegistrations.RegisteredServers)
            {
                Console.WriteLine("Server Name:{0},Login:{1},State:{2},Urn:{3}", regServer.Name, regServer.Login, regServer.State, regServer.Urn);
            }
            //建立ServerConnection的實例
            ServerConnection connection = new ServerConnection();
            //指定鏈接字符串
            connection.ConnectionString = "Data Source=goodapp;Initial Catalog=master;User ID=sa;Password=root;";
            //實例化Server
            Server server = new Server(connection);
            Console.WriteLine("ActiveDirectory:{0},InstanceName:{1}", server.ActiveDirectory, server.InstanceName);
            //下面列出每一個數據庫的具體信息
            foreach (Database db in server.Databases)
            {
                Console.WriteLine("Database Name:{0},ActiveDirectory:{1},ActiveConnections:{2},DataSpaceUsage:{3},PrimaryFilePath:{4}", db.Name, db.ActiveDirectory, db.ActiveConnections, db.DataSpaceUsage, db.PrimaryFilePath);
                //列出數據庫的數據文件文件組信息
                foreach (FileGroup fileGroup in db.FileGroups)
                {
                    Console.WriteLine("\tFileGroup Name:{0},Size:{1},State:{2},Urn:{3}", fileGroup.Name, fileGroup.Size, fileGroup.State, fileGroup.Urn);
                    //列出每一個文件組中的數據文件信息
                    foreach (DataFile dataFile in fileGroup.Files)
                    {
                        Console.WriteLine("\t\tDataFile Name:{0},Size:{1},State:{2},Urn:{3},FileName:{4}", dataFile.Name, dataFile.Size, dataFile.State, dataFile.Urn, dataFile.FileName);
                    }
                }
                //列出數據庫日誌文件信息
                foreach (LogFile logFile in db.LogFiles)
                {
                    Console.WriteLine("\tLogFile Name:{0},Size:{1},State:{2},Urn:{3},FileName:{4}", logFile.Name, logFile.Size, logFile.State,logFile.Urn,logFile.FileName);
                }
            }
        }
        /// <summary>
        /// 利用SMO建立SQL登陸
        /// </summary>
        public static void CreateLogin()
        {
            string loginName = "zhoufoxcn";//要建立的數據庫登陸名
            string loginPassword = "C#.NET";//登陸密碼
            //建立ServerConnection的實例
            ServerConnection connection = new ServerConnection();
            //指定鏈接字符串
            connection.ConnectionString = "Data Source=goodapp;Initial Catalog=master;User ID=sa;Password=root;";
            //實例化Server
            Server server = new Server(connection);
            #region [建立數據庫登陸對象]
            //檢查在數據庫是否已經存在該登陸名
            var queryLogin = from Login temp in server.Logins
                             where string.Equals(temp.Name, loginName, StringComparison.CurrentCultureIgnoreCase)
                             select temp;
            Login login = queryLogin.FirstOrDefault<Login>();
            //若是存在就刪除
            if (login != null)
            {
                login.Drop();
            }
            login = new Login(server, loginName);
            login.LoginType = LoginType.SqlLogin;//指定登陸方式爲SQL認證
            login.PasswordPolicyEnforced = true;
            login.DefaultDatabase = "master";//默認數據庫
            login.Create(loginPassword);
            #endregion
        }
        /// <summary>
        /// 利用SMO建立數據庫
        /// </summary>
        public static void CreateDatabase()
        {
            string databaseName = "SMODemo";
            //建立ServerConnection的實例
            ServerConnection connection = new ServerConnection();
            //指定鏈接字符串
            connection.ConnectionString = "Data Source=goodapp;Initial Catalog=master;User ID=sa;Password=root;";
            //實例化Server
            Server server = new Server(connection);
            #region [建立數據庫對象]
            //檢查在數據庫是否已經存在該數據庫
            var queryDatabase = from Database temp in server.Databases
                                where string.Equals(temp.Name, databaseName, StringComparison.CurrentCultureIgnoreCase)
                                select temp;
            Database database = queryDatabase.FirstOrDefault<Database>();
            //若是存在就刪除
            if (database != null)
            {
                database.Drop();
            }
            database = new Database(server, databaseName);
            //指定數據庫數據文件細節
            FileGroup fileGroup = new FileGroup { Name = "PRIMARY", Parent = database, IsDefault = true };
            DataFile dataFile = new DataFile
            {
                Name = databaseName + "_data",
                Parent = fileGroup,
                FileName = @"F:\SQLData2005\" + databaseName + ".mdf"
            };
            fileGroup.Files.Add(dataFile);
            //指定數據庫日誌文件細節
            LogFile logFile = new LogFile
            {
                Name = databaseName + "_log",
                Parent = database,
                FileName = @"F:\SQLData2005\" + databaseName + ".ldf"
            };
            database.FileGroups.Add(fileGroup);
            database.LogFiles.Add(logFile);
            database.Create();
            #endregion
        }
        /// <summary>
        /// 利用SMO備份數據庫
        /// </summary>
        public static void BackupDatabase()
        {
            string databaseName = "msdb";//備份的數據庫名
            string bkPath = @"C:\";//存放備份後的數據的文件夾
            //建立ServerConnection的實例
            ServerConnection connection = new ServerConnection();
            //指定鏈接字符串
            connection.ConnectionString = "Data Source=goodapp;Initial Catalog=master;User ID=sa;Password=root;";
            //實例化Server
            Server server = new Server(connection);
            #region [建立數據庫備份對象]
            Backup backup = new Backup();
            backup.Action = BackupActionType.Database;//徹底備份
            backup.Database = databaseName;
            backup.BackupSetDescription = "Full backup of master";
            backup.BackupSetName = "master Backup";
            //建立備份設備
            BackupDeviceItem bkDeviceItem = new BackupDeviceItem();
            bkDeviceItem.DeviceType = DeviceType.File;
            bkDeviceItem.Name = bkPath+databaseName+".bak";
            backup.Devices.Add(bkDeviceItem);
            backup.Incremental = false;
            backup.LogTruncation = BackupTruncateLogType.Truncate;
            backup.SqlBackup(server);
            #endregion
        }
        /// <summary>
        /// 備份數據庫
        /// </summary>
        public static void RestoreDatabase()
        {
            string databaseName = "SMODemo";//備份的數據庫名
            string bkPath = @"C:\";//存放備份後的數據的文件夾
            //建立ServerConnection的實例
            ServerConnection connection = new ServerConnection();
            //指定鏈接字符串
            connection.ConnectionString = "Data Source=goodapp;Initial Catalog=master;User ID=sa;Password=root;";
            //實例化Server
            Server server = new Server(connection);
            Restore restore = new Restore();
            restore.NoRecovery = false;
            restore.NoRewind = false;
            restore.Action = RestoreActionType.Database;
            restore.Database = databaseName;
            //建立備份設備
            BackupDeviceItem bkDeviceItem = new BackupDeviceItem();
            bkDeviceItem.DeviceType = DeviceType.File;
            bkDeviceItem.Name = bkPath + databaseName + ".bak";
            //若是須要從新制定Restore後的數據庫的物理文件位置，須要知道數據庫文件的邏輯文件名
            //能夠RESTORE FILELISTONLY 來列出邏輯文件名，若是覆蓋已有數據庫能夠經過SMO來獲取
            //因本處使用的是剛剛備份的msdb數據庫來Restore，因此其分別爲"MSDBData"和"MSDBLog"
            //若是不指定Restore路徑則默認恢復到數據庫服務器存放數據的文件夾下
            RelocateFile relocateDataFile = new RelocateFile { LogicalFileName = "MSDBData", PhysicalFileName = bkPath + databaseName + ".mdf" };//(databaseName + "_data", bkPath + databaseName + ".mdf");
            RelocateFile relocateLogFile = new RelocateFile { LogicalFileName = "MSDBLog", PhysicalFileName = bkPath + databaseName + ".ldf" };//(databaseName + "_log", bkPath + databaseName + ".ldf");
            restore.Devices.Add(bkDeviceItem);
            restore.RelocateFiles.Add(relocateDataFile);
            restore.RelocateFiles.Add(relocateLogFile);
            restore.SqlRestore(server);
        }
    }
}

執行結果在這裏就不貼圖了，反正是是在周公家裏的中文環境和辦公室英文環境中測試經過。預先透漏一下，下一篇將講述如何獲取SQL Server的對象的建立SQL語句，好比表、存儲過程、函數等。

2012-05-23

周公