ASP.NET: Get a list of all selected items in a CheckBoxList

Summary: Get a list of each item that was checked in a CheckBoxList

An example page with a CheckBoxList:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default1.aspx.vb" Inherits="Default1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:CheckBoxList ID="CheckBoxList1" runat="server">
<asp:ListItem Text="1" Value="1"></asp:ListItem>
<asp:ListItem Text="2" Value="2"></asp:ListItem>
<asp:ListItem Text="3" Value="3"></asp:ListItem>
</asp:CheckBoxList>
<asp:Button ID="Button1" runat="server" Text="Button" />
</div>
</form>
</body>
</html>

How to retrieve each selected value:

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
For Each li As ListItem In CheckBoxList1.Items
If li.Selected = True Then Response.Write(li.Value & "<br>")
Next
End Sub

This Hack is part of the ASP.NET Hacks collection

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