梦想飞的鱼

摘要：usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingCRM.Model;usingSystem.Configuration;usingSystem.Linq.Expressions;usingSystem.Data.SqlClient;usingSystem.Data.Linq;namespaceCRM.DAL{///<summary>///Linq数据访问层///</summary>publicclassLinqHelper{///<summary& 阅读全文

摘要：异步回调是指异步执行一个带回调函数的方法；代码如下classProgram{staticvoidMain(string[]args){Action<string>A1=newAction<string>(Show);A1.BeginInvoke("Hello",Callback,"回调参数");Console.Read();}//回调方法publicstaticvoidCallback(IAsyncResultar){objectstr=ar.AsyncStateasstring;Console.WriteLine(str);}/ 阅读全文