本篇教你动态添加用户控件。
为了让用户控件能ASP.NET页面实现动态添加,首先写一个接口IGetUCable,这个接口有一个函数,返回对象类型是UserControl。


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
/// <summary>
/// Summary description for IGetUCable
/// </summary>
namespace Insus.NET
{
public interface IGetUCable
{
UserControl GetUC();
}
}
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
/// <summary>
/// Summary description for IGetUCable
/// </summary>
namespace Insus.NET
{
public interface IGetUCable
{
UserControl GetUC();
}
}
有了接口之后,需要创建用户控件Calculator.ascx:


<%
@ Control Language
=
"
C#
"
AutoEventWireup
=
"
true
"
CodeFile
=
"
Calculator.ascx.cs
"
Inherits
=
"
Calculator
"
%>
Number A: < asp:TextBox ID ="TextBox1" runat ="server" ></ asp:TextBox > < br />
+ < br />
Number B: < asp:TextBox ID ="TextBox2" runat ="server" ></ asp:TextBox >< br />
< asp:Button ID ="ButtonEqual" runat ="server" Text ="="
OnClick ="ButtonEqual_Click1" />
< br />
Result: < asp:Label ID ="LabelResult" runat ="server" Text ="" ></ asp:Label >
Number A: < asp:TextBox ID ="TextBox1" runat ="server" ></ asp:TextBox > < br />
+ < br />
Number B: < asp:TextBox ID ="TextBox2" runat ="server" ></ asp:TextBox >< br />
< asp:Button ID ="ButtonEqual" runat ="server" Text ="="
OnClick ="ButtonEqual_Click1" />
< br />
Result: < asp:Label ID ="LabelResult" runat ="server" Text ="" ></ asp:Label >
Calculator.ascx.cs,cs实现接口:


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;
public partial class Calculator : System.Web.UI.UserControl,IGetUCable
{
protected void Page_Load( object sender, EventArgs e)
{
}
protected void ButtonEqual_Click1( object sender, EventArgs e)
{
decimal a = decimal.Parse( this.TextBox1.Text.Trim());
decimal b = decimal.Parse( this.TextBox2.Text.Trim());
this.LabelResult.Text = (a + b).ToString ();
}
public UserControl GetUC()
{
return this;
}
}
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;
public partial class Calculator : System.Web.UI.UserControl,IGetUCable
{
protected void Page_Load( object sender, EventArgs e)
{
}
protected void ButtonEqual_Click1( object sender, EventArgs e)
{
decimal a = decimal.Parse( this.TextBox1.Text.Trim());
decimal b = decimal.Parse( this.TextBox2.Text.Trim());
this.LabelResult.Text = (a + b).ToString ();
}
public UserControl GetUC()
{
return this;
}
}
最后是在需要加载用户控件的aspx的Page_load事件写:


protected
void Page_Load(
object sender, EventArgs e)
{
IGetUCable uc1 = (IGetUCable)LoadControl( " ~/Calculator.ascx ");
this.form1.Controls.Add(uc1.GetUC());
}
{
IGetUCable uc1 = (IGetUCable)LoadControl( " ~/Calculator.ascx ");
this.form1.Controls.Add(uc1.GetUC());
}
用户控件加载之后运行效果:
源程序(.NET3.5 + ASP.NET + C#)
http://download.cnblogs.com/insus/ASPDOTNET/DynamicallyLoadingUserControl.rar