If we want the user to select more than one option, then a CheckBoxList control can be used.
Usefull properties
1. RepeatDirection
2. RepeatColumns
3. Enabled
4. SelectedIndex :- If we select the multiple item It only returns the selected index of the one list item object (lowest level index).
5. SelectedValue :- If we select the multiple item It only returns the selected value of the one list item object (lowest level index).
6. SelectedItem :- It returns only one item.
Example :-
WebForm1.aspx :-
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="_23_CheckBoxList.WebForm1" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:CheckBoxList ID="CheckBoxList1" runat="server" RepeatColumns="2"
RepeatDirection="Horizontal">
<asp:ListItem Value="1">Diploma</asp:ListItem>
<asp:ListItem Value="2">Graduate</asp:ListItem>
<asp:ListItem Value="3">Post Graduate</asp:ListItem>
<asp:ListItem Value="4">Doctrate</asp:ListItem>
</asp:CheckBoxList>
<br />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
<br />
</div>
</form>
</body>
</html>
WebForm1.aspx.cs :-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace _23_CheckBoxList
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (CheckBoxList1.SelectedItem != null)
{
Response.Write(CheckBoxList1.SelectedItem.Text);
}
/*foreach (ListItem li in CheckBoxList1.Items)
{
if (li.Selected)
{
Response.Write("Text = " + li.Text + ", ");
Response.Write("Value = " + li.Value + ", ");
Response.Write("Index = " + CheckBoxList1.Items.IndexOf(li));
Response.Write("<br/>");
}
}*/
}
}
}
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