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 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

+ View Code?

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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     } }