MongoDB

1.什么是mongodb？

：mongodb is a document database with the scalability and flexibility that you want with the querying and indexing that you need

*：mongodb是一种面向文档的数据库管理系统，由c++撰写而成

：mongodb 是一个基于分布式文件存储的数据库

2.为什么我要使用mongodb

最近写一个项目，很多业务需要在调度中多线程处理。使用的是linq+ef，数据库是mssql，中间业务不算复杂，关系七八张表，中间有io操作，git操作，cmd命令操作等  ..速度实在是没有办法忍受.

大概几千个文件提交需要执行30分钟。。。。  

后来了解到有mongodb这种数据库，性能高，灵活，扩展性高等等，再根据我们代码和业务的实际情况，就用准备测试一下实际情况

然后根据业务和一些性能考虑将调度代码分成三部分，

再次测速的几个文件提交只花了十几秒钟的时间。

mongodb功不可没。

 3.下载

官网下载就可以了 

4.安装

一直点下一步就好了

5.使用

贴一点代码，非真实项目中代码，还有需要修改的地方，比如反射没使用委托等

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>
		/// 数据库连接
		/// </summary> 
		static mongoclient client = new mongoclient("mongodb://127.0.0.1:27017");//constdefine.mongodbconnectionstring 
		/// <summary>
		/// 数据库名
		/// </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 删 
		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
	}
}