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<%@ Page Language="VB" %>
<%@ Register TagPrefix="Control" Namespace="Control" Assembly="Control" %>
<script language="vb" runat="server">
Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
listControl.DataSource = New String() {"Test 1", "Test 2", "Test 3"}
listControl.DataBind()
End Sub
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<html>
<head>
<title>Creating a Databound Control</title>
</head>
<body>
<Control:CustomBulletedList id="listControl" runat="server" />
</body>
</html>
File: Control.vb
Imports System
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.ComponentModel
Imports System.Collections
Imports System.Text
Namespace Control
Public Class CustomBulletedList
Inherits System.Web.UI.WebControls.WebControl
Private _html As New StringBuilder()
Private _dataSource As IEnumerable
Public Property DataSource() As IEnumerable
Get
Return _dataSource
End Get
Set(ByVal value As IEnumerable)
_dataSource = value
End Set
End Property
Private Sub CreateBulletedList()
Dim dataSource As IEnumerable = Nothing
Try
dataSource = Me._dataSource
Catch
End Try
If Not (dataSource Is Nothing) Then
_html.Append("<ul>")
Dim dataObject As Object
For Each dataObject In dataSource
_html.Append("<li>")
_html.Append(dataObject)
_html.Append("</li>")
Next dataObject
_html.Append("</ul>")
End If
End Sub
Public Overrides Sub DataBind()
MyBase.OnDataBinding(EventArgs.Empty)
CreateBulletedList()
End Sub
Protected Overrides Sub Render(ByVal output As HtmlTextWriter)
output.Write(_html)
End Sub
End Class
End Namespace
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