1
//UserControl1.aspx
2<%@ Control Language="c#" AutoEventWireup="false" Codebehind="UserControl1.ascx.cs" Inherits="Test.UserControl1.ascx.cs" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%>
3<asp:DropDownList id="drp1" AutoPostBack="True" runat="server"></asp:DropDownList>
4<asp:DropDownList id="drp2" AutoPostBack="True" runat="server"></asp:DropDownList>
5
6//UserControl1.ascx.cs
7using System;
8using System.Collections;
9using System.Data;
10using System.Web.UI;
11using System.Web.UI.WebControls;
12
13using namespace Test
14public class UserContorl1:UserControl
15
{
16
protected DropDownList drp1;
17protected DropDownList drp2;
18
19public void OnInit(int num1,int num2)
20
{
21 BindDrp1(num1);
22 BindDrp2(num2);
23
}
24//绑定drp1
25private void BindDrp1(int num)
26{
27 ArrayList al=new ArrayList();
28 ListItem lst;
29 for(int i=1;i<=num;i++)
30 {
31 lst=new ListItem("第"+i.ToString()+"轮",i.ToString());
32 al.Add(lst);
33 }
34 drp1.DataSource=al;
drp1.DataTextField="Text";
drp1.DataValueField="Value";
35 drp1.DataBind();
drp1.SelectedValue=num.ToString();
36}
37//绑定drp2
38private void BindDrp2(int num)
39{
40 ArrayList al=new ArrayList();
41 ListItem lst;
42 for(int i=1;i<=num;i++)
43 {
44 lst=new ListItem("第"+i.ToString()+"轮",i.ToString());
45 al.Add(lst);
46 }
47 drp2.DataSource=al;
drp2.DataTextField="Text";
drp2.DataValueField="Value";
48 drp2.DataBind();
drp2.SelectedValue=num.ToString();
49 }
50
}
51}
52
//UserControl1.aspx 2
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="UserControl1.ascx.cs" Inherits="Test.UserControl1.ascx.cs" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%> 3
<asp:DropDownList id="drp1" AutoPostBack="True" runat="server"></asp:DropDownList> 4
<asp:DropDownList id="drp2" AutoPostBack="True" runat="server"></asp:DropDownList> 5
6
//UserControl1.ascx.cs 7
using System; 8
using System.Collections; 9
using System.Data; 10
using System.Web.UI; 11
using System.Web.UI.WebControls; 12
13
using namespace Test 14
public class UserContorl1:UserControl 15
{ 
16
protected DropDownList drp1; 17
protected DropDownList drp2; 18
19
public void OnInit(int num1,int num2) 20
{ 
21
BindDrp1(num1); 22
BindDrp2(num2); 23
} 24
//绑定drp1 25
private void BindDrp1(int num) 26
{ 27
ArrayList al=new ArrayList(); 28
ListItem lst; 29
for(int i=1;i<=num;i++) 30
{ 31
lst=new ListItem("第"+i.ToString()+"轮",i.ToString()); 32
al.Add(lst); 33
} 34
drp1.DataSource=al; drp1.DataTextField="Text";
drp1.DataValueField="Value";
35
drp1.DataBind(); drp1.SelectedValue=num.ToString();
36
} 37
//绑定drp2 38
private void BindDrp2(int num) 39
{ 40
ArrayList al=new ArrayList(); 41
ListItem lst; 42
for(int i=1;i<=num;i++) 43
{ 44
lst=new ListItem("第"+i.ToString()+"轮",i.ToString()); 45
al.Add(lst); 46
} 47
drp2.DataSource=al; drp2.DataTextField="Text";
drp2.DataValueField="Value";
48
drp2.DataBind(); drp2.SelectedValue=num.ToString();
49
} 50
} 51
} 52
前面很简单，现在看我们在页面中怎样子调用前面的这个自定义控件了。
<%@ Page language="c#" Codebehind="WebForm2.aspx.cs" AutoEventWireup="false" Inherits="WebForm2" %> <%@ Register TagPrefix="uc1" TagName="UserControl11" Src="UserControl1.ascx" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> <HEAD> <title>WebForm2</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <uc1:UserControl1 id="UserControl11" runat="server"></uc1:UserControl1> </form> </body> </HTML> //部分后台代码 public class WebForm2 : Page protected UserControl1 UserControl11; //这句是重点，默认我们在添加的时候是不会添加的， //要自己手动来添加，而且变量名要跟前面页面中一样 private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 if(!Page.IsPostBack) { UserControl11.OnInit(10，20); } //这样就可以给他传值了 //下面还可以获得自定义控件上的控件 DropDownList drp1=UserControl11.FindControl("drp1") as DropDownList;