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Saturday, 31 January 2015

Detect Checked CheckBox Indise GridView on Button Click In Asp.Net Using C#.Net

1/31/2015 - By Pranav Singh 0

This article will show you how you can detect the checkbox check inside gridview on button click on asp.net using c#.net.


So for this article first we will create a new asp.net application and add the below code into the aspx page.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.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>Detect Checked CheckBox Indise GridView on Button Click In Asp.Net Using C#.Net
    </title>
</head>
<body>
    <form id="form1" runat="server">
    <table width="100%" cellpadding="4" cellspacing="4">
        <tr>
            <td align="left">
                <asp:GridView ID="GridView1" runat="server" Width="100%" AutoGenerateColumns="False"
                    AllowPaging="True">
                    <Columns>
                        <asp:TemplateField HeaderText="">
                            <ItemTemplate>
                                <asp:CheckBox ID="CheckBox1" runat="server" />                            
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Name">
                         <ItemTemplate>
                             <asp:Label ID="lblName" runat="server" Text='<%# Eval("Name") %>'></asp:Label>
                         </ItemTemplate>
                        </asp:TemplateField>
                        <asp:BoundField DataField="Address" HeaderText="Address" />
                        <asp:BoundField DataField="UserType" HeaderText="UserType" />
                    </Columns>
                </asp:GridView>
            </td>
        </tr>
    </table>
    <asp:Label ID="lblSelectedName" runat="server" Style="color: #FF0000" Text=""></asp:Label>
    <br />
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Submit" />
    </form>
</body>
</html>

In this I have added gridview and a button control and label control. So when user click on button checkbox selected row name we will display on the label control.

Now please check the code which we will used for managing the checkbox control detection inside gridview.

using System;
using System.Data.SqlClient;
using System.Data;
using System.Web.UI.WebControls;
using System.Collections;
namespace WebApplication1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                GetDistinctValue();
            }
        }
        private void GetDistinctValue()
        {
            SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["con"].ToString());
            try
            {
                DataTable objdt = new DataTable();
                string query = "select * from UserDetail;";
                SqlDataAdapter da = new SqlDataAdapter(query, con);
                con.Open();
                da.Fill(objdt);
                con.Close();
                if (objdt.Rows.Count > 0)
                {
                    GridView1.DataSource = objdt;
                    GridView1.DataBind();
                }
            }
            catch
            {
                con.Close();
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string SelectedName = "";
            foreach (GridViewRow item in GridView1.Rows)
            {
                CheckBox checkbox1 = (CheckBox)item.FindControl("CheckBox1");              
                if (checkbox1.Checked == true)
                {
                    Label lblName = (Label)item.FindControl("lblName");
                    SelectedName = SelectedName + lblName.Text + ",";
                }
            }
            lblSelectedName.Text = SelectedName;
        }
    }
}

In above code I have first bind the grid view and then on button click event I have detected checkbox control and on the bases of selection I have detected the name of label control to check the name to display.

Have a look of the code to detect the checkbox checked.

protected void Button1_Click(object sender, EventArgs e)
        {
            string SelectedName = "";
            foreach (GridViewRow item in GridView1.Rows)
            {
                CheckBox checkbox1 = (CheckBox)item.FindControl("CheckBox1");              
                if (checkbox1.Checked == true)
                {
                    Label lblName = (Label)item.FindControl("lblName");
                    SelectedName = SelectedName + lblName.Text + ",";
                }
            }
            lblSelectedName.Text = SelectedName;
        }

Now we have done the application to check the output.


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