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  • MongoDB

    1.什么是MongoDB?

    官网介绍:MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need

    维基百科:MongoDB是一种面向文档的数据库管理系统,由C++撰写而成

    百度百科:MongoDB 是一个基于分布式文存储的数据库

    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 https://www.mongodb.com/

    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
    	}
    }   
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  • 原文地址:https://www.cnblogs.com/hanfan/p/9842542.html
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