在下面的代码中，封装了一个ASP的textbox控件。我将我的控件名属性与textbox的内容挂钩。

events.ascx
<script language="VB" runat="server">
Sub Page_Load(Src As Object, E As EventArgs)
Dim strInitialText As String = "Please Enter a Name!"

If Page.IsPostBack Then
If txtName.Text = strInitialText
txtName.Text = ""
End If
Else
txtName.Text = strInitialText
End If
End Sub

Public Property Name As String
Get
Return txtName.Text
End Get
Set
txtName.Text = Value
End Set
End Property
</script>

Name: <asp:textbox id="txtName" runat="server" />

<asp:RequiredFieldValidator ControlToValidate="txtName"
id="valtxtName" Display="Dynamic" runat=server>
Please Enter a Name!
</asp:RequiredFieldValidator>

events.aspx
<%@ Page Language="VB" ClientTarget="downlevel" %>
<%@ Register TagPrefix="asp101samps" TagName="SomeText"
Src="properties.ascx" %>
<%@ Register TagPrefix="asp101samps" TagName="TextBox"
Src="events.ascx" %>

<script language="VB" runat="server">
Sub Page_Load(Sender As Object, E As EventArgs)
txtLabel.Text = ""

' The textbox control handles it's own stuff
' in it's own Page_Load event handler.
End Sub

Sub btnSubmit_Click(Sender As Object, E As EventArgs)
' Sets the label to the textbox's text
txtLabel.Text = txtName.Name

' I don't need to worry about validation since
' my user control does it for me.
End Sub
</script>

<html>
<head>
<title>ASP.NET User Control Sample - Validation & Events</title>
</head>
<body bgcolor="#FFFFFF">

<form runat="server">

<asp101samps:TextBox id="txtName" runat="server" />

<br />

<asp:button id="btnSubmit" onClick="btnSubmit_Click"
text="Submit" runat="server" />

</form>

<asp101samps:SomeText id="txtLabel" runat="server" />

</body>
</html>

这就是关于用户控件和应用的说明。无论你认为它是否简单，它肯定比使用传统ASP要容易。