匿名方法

匿名方法优点：减少系统开销，在真正委托调用时才定义。

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
using System.Collections;

public partial class _Default : System.Web.UI.Page
{
    delegate string Getdelegate(string s);

    protected void Page_Load(object sender, EventArgs e)
    {

        Getdelegate ons = delegate(string s)
        {
            return s;
        };

        Response.Write(ons("haha"));


    }

}

 

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;
using System.Collections;

public partial class _Default : System.Web.UI.Page
{
    delegate double Getdelegate(double s);

    protected void Page_Load(object sender, EventArgs e)
    {

        Getdelegate ons = delegate(double s) { return s * 9; };
        Getdelegate ons2 = delegate(double i) { return i * 8; };

        Getdelegate[] gets ={ ons, ons2 };

        foreach (Getdelegate ss in gets)
        {
            Response.Write(ss(3));
        }
    }

}

 

评论

1 楼 wangyazhen 2010-04-23  

在.Net3.5中有Func<T, TResult>和System.Action 也是更方便的实现这些！可惜在。net2.0中不支持！在.net2.0同样不支持的还有匿名类，。net3.5不知道支持了没，前段时间似乎在哪里看过说vs2010会支持的....