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<%@ Page Language="VB" %>
<%@ Import Namespace="System.Collections.Generic" %>
<script runat="server">
Private groceries As New List(Of String)()
Sub Page_Load()
groceries.Add("Milk")
groceries.Add("Steak")
groceries.Add("Fish")
End Sub
Sub Sort_Command(ByVal sender As Object, ByVal e As CommandEventArgs)
If e.CommandName = "Sort" Then
Select Case e.CommandArgument.ToString()
Case "ASC"
groceries.Sort(AddressOf SortASC)
Case "DESC"
groceries.Sort(AddressOf SortDESC)
End Select
End If
End Sub
Sub Page_PreRender()
bltGroceries.DataSource = groceries
bltGroceries.DataBind()
End Sub
Function SortASC(ByVal x As String, ByVal y As String) As Integer
Return String.Compare(x, y)
End Function
Function SortDESC(ByVal x As String, ByVal y As String) As Integer
Return String.Compare(x, y) * -1
End Function
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Button Command</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button
id="btnSortAsc"
Text="Sort ASC"
CommandName="Sort"
CommandArgument="ASC"
OnCommand="Sort_Command"
Runat="server" />
<asp:Button
id="btnSortDESC"
Text="Sort DESC"
CommandName="Sort"
CommandArgument="DESC"
OnCommand="Sort_Command"
Runat="server" />
<br /><br />
<asp:BulletedList
id="bltGroceries"
Runat="server" />
</div>
</form>
</body>
</html>
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