封装一个MongoDB的 asp.net 链接类
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using MongoDB;
- /// <summary>
- /// 对Mongo和MongoDatabase的包装类
- /// </summary>
- public class MyMongoDb : IDisposable
- {
- private Mongo _mongo;
- private IMongoDatabase _db;
- private static string connectionString = "Server=127.0.0.1;mydb";
- private static readonly string _connectionString = connectionString.Split(‘;‘)[0];// "Server=127.0.0.1";
- private static readonly string _dbName = connectionString.Split(‘;‘)[1];
- public MyMongoDb()
- : this(_connectionString, _dbName)
- {
- }
- public MyMongoDb(string dbName)
- : this(_connectionString, dbName)
- {
- }
- /// <summary>
- /// 构造函数。根据指定连接字符串和数据库名
- /// </summary>
- /// <param name="connectionString">连接字符串</param>
- /// <param name="dbName">数据库名,可为空,但必须在任何操作数据库之前要调用UseDb()方法</param>
- public MyMongoDb(string connectionString, string dbName)
- {
- if( string.IsNullOrEmpty(connectionString) )
- throw new ArgumentNullException("connectionString");
- _mongo = new Mongo(connectionString);
- // 立即连接 MongoDB
- _mongo.Connect();
- if( string.IsNullOrEmpty(dbName) == false )
- _db = _mongo.GetDatabase(dbName);
- }
- /// <summary>
- /// 切换到指定的数据库
- /// </summary>
- /// <param name="dbName"></param>
- /// <returns></returns>
- public IMongoDatabase UseDb(string dbName)
- {
- if( string.IsNullOrEmpty(dbName) )
- throw new ArgumentNullException("dbName");
- _db = _mongo.GetDatabase(dbName);
- return _db;
- }
- /// <summary>
- /// 获取当前连接的数据库
- /// </summary>
- public IMongoDatabase CurrentDb
- {
- get
- {
- if( _db == null )
- throw new Exception("当前连接没有指定任何数据库。请在构造函数中指定数据库名或者调用UseDb()方法切换数据库。");
- return _db;
- }
- }
- /// <summary>
- /// 获取当前连接数据库的指定集合【依据类型】
- /// </summary>
- /// <typeparam name="T"></typeparam>
- /// <returns></returns>
- public IMongoCollection<T> GetCollection<T>() where T : class
- {
- return this.CurrentDb.GetCollection<T>();
- }
- /// <summary>
- /// 获取当前连接数据库的指定集合【根据指定名称】
- /// </summary>
- /// <typeparam name="T"></typeparam>
- /// <param name="name">集合名称</param>
- /// <returns></returns>
- public IMongoCollection<T> GetCollection<T>(string name) where T : class
- {
- return this.CurrentDb.GetCollection<T>(name);
- }
- public void Dispose()
- {
- if( _mongo != null ) {
- _mongo.Dispose();
- _mongo = null;
- }
- }
- }
使用链接类
- public void Insert(USER user)
- {
- using (MyMongoDb mdb = new MyMongoDb())
- {
- var collection = mdb.GetCollection<USER>();
- collection.Insert(user);
- }
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