MongoDB

1.什麼是MongoDB？

官網介紹：MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need

維基百科：MongoDB是一種面向文檔的數據庫管理系統，由C++撰寫而成

百度百科：MongoDB 是一個基於分佈式文件存儲的數據庫

2.爲何我要使用MongoDB

最近寫一個項目，不少業務須要在調度中多線程處理。使用的是LINQ+EF，數據庫是msSQL，中間業務不算複雜，關係七八張表，中間有IO操做，GIT操做，CMD命令操做等  ..速度實在是沒有辦法忍受.

大概幾千個文件提交須要執行30分鐘。。。。  

後來瞭解到有MongoDB這種數據庫，性能高，靈活，擴展性高等等，再根據咱們代碼和業務的實際狀況，就用準備測試一下實際狀況

而後根據業務和一些性能考慮將調度代碼分紅三部分，

再次測速的幾個文件提交只花了十幾秒鐘的時間。

MongoDB功不可沒。

 3.下載

官網下載就能夠了 https://www.mongodb.com/

4.安裝

一直點下一步就行了

5.使用

貼一點代碼，非真實項目中代碼，還有須要修改的地方，好比反射沒使用委託等

using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;
using MongoDB.Driver;

namespace Model
{
	public static class MongoDBHelperNow<T>
	{

		/// <summary>
		/// 數據庫鏈接
		/// </summary> 
		static MongoClient client = new MongoClient("mongodb://127.0.0.1:27017");//ConstDefine.MongoDBConnectionString 
		/// <summary>
		/// 數據庫名
		/// </summary>
		private static readonly IMongoDatabase _gitDatabase = client.GetDatabase("Blog");//"Git"ConstDefine.MongoDBGitTableName

		public static IMongoDatabase GitDb { get { return _gitDatabase; } }

		public static IMongoCollection<T> GitTable(string keyname) => _gitDatabase.GetCollection<T>(keyname);

		private static string GetTableName() => typeof(T).ToString().Split('_')[1];

		#region 增   
		public static void InsertOne(T entity) => GitTable(GetTableName()).InsertOne(entity);
		public static void InsertOneAsync(T entity) => GitTable(GetTableName()).InsertOneAsync(entity); 
		public static void InsertList(List<T> entity) => GitTable(GetTableName()).InsertMany(entity);
		public static void InsertListAsync(List<T> entity) => GitTable(GetTableName()).InsertManyAsync(entity); 
		#endregion  
		#region 刪 
		public static void DeleteOne(Expression<Func<T, bool>> whereLambda) => GitTable(GetTableName()).FindOneAndDelete(whereLambda);
		public static void DeleteOneAsync(Expression<Func<T, bool>> whereLambda) => GitTable(GetTableName()).FindOneAndDeleteAsync(whereLambda); 
		public static void DeleteList(Expression<Func<T, bool>> whereLambda) => GitTable(GetTableName()).DeleteMany(whereLambda);
		public static void DeleteListAsync(Expression<Func<T, bool>> whereLambda) => GitTable(GetTableName()).DeleteManyAsync(whereLambda);
		#endregion
		#region 查
		public static T FindOne(Expression<Func<T, bool>> whereLambda) => GitTable(GetTableName()).Find(whereLambda).FirstOrDefault();
		public static List<T> FindList(Expression<Func<T, bool>> whereLambda) => GitTable(GetTableName()).Find(whereLambda).ToList();
		#endregion
		#region 改
		public static T ReplaceOne(Expression<Func<T, bool>> whereLambda,T entity) => GitTable(GetTableName()).FindOneAndReplace(whereLambda, entity);  
		public static Task<T> ReplaceOneAsync(Expression<Func<T, bool>> whereLambda, T entity) => GitTable(GetTableName()).FindOneAndReplaceAsync(whereLambda, entity);  
		#endregion
	}
}