Get Selected Checkboxes in ASP Repeater

Question

3.00/5 (2 votes)

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Hi,
thhis is my asp page

ASP.NET

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Repeater ID="Repeater1" runat="server" >
            <ItemTemplate>
                <div>
                    <asp:CheckBox ID="CategoryID" runat="server" Text='<%# Eval("val") %>' />
                </div>
            </ItemTemplate>
        </asp:Repeater>
        <asp:Button Text="Click" OnClick="Button2_Click" runat="server" />
    </form>
</body>
</html>

C#

using System;
using System.Data;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("val", typeof(string));
        for (int i = 0; i < 10; i++)
            dt.Rows.Add("testing" + i.ToString());
        Repeater1.DataSource = dt;
        Repeater1.DataBind();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        string Rpt = "Repeater Items Checked:<br />";
        for (int i = 0; i < Repeater1.Items.Count; i++)
        {
            CheckBox chk = (CheckBox)Repeater1.Items[i].FindControl("CategoryID");
            if (chk.Checked)
            {
                Rpt += (chk.Text + "<br />");
            }
        }
        Response.Write(Rpt);
    }
}

i want to get the value of selected check boxes, but it doesn't work!!!!!!

Posted 26-Jan-13 2:35am

shajarian_lover

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Comments

Sandeep Mewara 26-Jan-13 12:43pm

Code looks fine. What do you see when you debug? Not running as expected?
How do you show associated data as checkbox?

1 solution

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Taha Akhtar · Accepted Answer · 2013-01-26T22:07:00

I assume you are a beginner
when you press click button it fires postback event and call Page_Load event, which rebind the repeater and calls Button2_Click therefore no items is checked use the following in page load method.

C#

if (!IsPostBack)
       {
           DataTable dt = new DataTable();
           dt.Columns.Add("val", typeof(string));
           for (int i = 0; i < 10; i++)
               dt.Rows.Add("testing" + i.ToString());
           Repeater1.DataSource = dt;
           Repeater1.DataBind();
       }