用户控件事件使用delegate

用户控件事件使用delegate

1.在我们写一个用户控件时需要考虑到重用得问题,如果控件中包含按钮事件,

我们不可能将点击事件写到控件里,而是我们想吧事件处理得过程写在

调用控件的页面中,这是该怎么处理呢?

我的做法时使用delegate来实现这个功能!

具体做法如下:
下面是控件的html部分

 1 <% @ Control Language="C#" AutoEventWireup="true" CodeFile="ctlForm.ascx.cs" Inherits="ctlForm"  %>
 2 < table >
 3      < tr >
 4          < td  style ="width: 100px" >
 5             name </ td >
 6          < td  style ="width: 100px" >
 7              < asp:TextBox  ID ="TextBox1"  runat ="server" ></ asp:TextBox ></ td >
 8      </ tr >
 9      < tr >
10          < td  style ="width: 100px" >
11             sex </ td >
12          < td  style ="width: 100px" >
13              < asp:TextBox  ID ="TextBox2"  runat ="server" ></ asp:TextBox ></ td >
14      </ tr >
15      < tr >
16          < td  style ="width: 100px" >
17          </ td >
18          < td  style ="width: 100px" >
19              < asp:Button  ID ="Button1"  runat ="server"  OnClick ="Button1_Click"  Text ="测试"   /></ td >
20      </ tr >
21 </ table >
22

控件的cs部分

 1 using  System;
 2 using  System.Data;
 3 using  System.Configuration;
 4 using  System.Collections;
 5 using  System.Web;
 6 using  System.Web.Security;
 7 using  System.Web.UI;
 8 using  System.Web.UI.WebControls;
 9 using  System.Web.UI.WebControls.WebParts;
10 using  System.Web.UI.HtmlControls;
11
12 public  partial  class  ctlForm : System.Web.UI.UserControl
13 {
14    protected void Page_Load(object sender, EventArgs e)
15    {
16
17    }
18
19    public delegate void ClickHander();
20
21    public ClickHander MyClickHandler = null;
22
23    public void Button1_Click(object sender, EventArgs e)
24    {
25        if (MyClickHandler != null)
26        {
27            MyClickHandler();
28        }
29    }
30}
31

我们调用这个控件的页面写法如下:

 1 <% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " testForm.aspx.cs "  Inherits = " testForm "   %>
 2
 3 <% @ Register Src = " ctlForm.ascx "  TagName = " ctlForm "  TagPrefix = " uc1 "   %>
 4
 5 <! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >
 6
 7 < html xmlns = " http://www.w3.org/1999/xhtml "   >
 8 < head runat = " server " >
 9      < title > 无标题页 </ title >
10 </ head >
11 < body >
12      < form id = " form1 "  runat = " server " >
13      < div >
14          < uc1:ctlForm ID = " CtlForm1 "  runat = " server "   />
15     
16      </ div >
17      </ form >
18 </ body >
19 </ html >
20

调用控件的cs代码如下

 1 using  System;
 2 using  System.Data;
 3 using  System.Configuration;
 4 using  System.Collections;
 5 using  System.Web;
 6 using  System.Web.Security;
 7 using  System.Web.UI;
 8 using  System.Web.UI.WebControls;
 9 using  System.Web.UI.WebControls.WebParts;
10 using  System.Web.UI.HtmlControls;
11
12 public  partial  class  testForm : System.Web.UI.Page
13 {
14    protected void Page_Load(object sender, EventArgs e)
15    {
16        CtlForm1.MyClickHandler = new ctlForm.ClickHander(this.Test);
17    }
18
19    public void Test()
20    {
21        Response.Write("ok");
22    }
23
24    
25}

转载于:https://www.cnblogs.com/lindayyh/archive/2008/11/27/1342579.html