In this article we will discuss how to check all rows in a gridview in asp.net using javascript. When user clicks on the header checkbox it call a javascript function on that we are written logic about checkall/uncheckall for a gridview.
We will be using region table
Step 1: Create a table using the following script with data:
Click the button it will show a popup you can copy the SQL script data.
Step 2: Create a webform as gridview.aspx and copy and paste the following code.
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>check/uncheck all gridview in asp.net </title>
<script type="text/javascript">
function UncheckHeader(headerchk) {
var gvcheck = document.getElementById('gvdetails');
var inputs = gvcheck.rows[0].getElementsByTagName('input');
inputs[0].checked = false;
}
function SelectAll(headerchk) {
var gvcheck = document.getElementById('gvdetails');
var i;
//if true checked all checkboxes
if (headerchk.checked) {
for (i = 0; i < gvcheck.rows.length; i++) {
var inputs =gvcheck.rows[i].getElementsByTagName('input');
inputs[0].checked = true;
}
}
//if condition fails uncheck allcheckboxes in gridview
else {
for (i = 0; i < gvcheck.rows.length; i++) {
var inputs =gvcheck.rows[i].getElementsByTagName('input');
inputs[0].checked = false;
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="gvdetails" runat="server" >
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="chkheader" runat="server" onclick="javascript:SelectAll(this)" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkchild" runat="server" onclick="javascript:UncheckHeader(this)" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</form>
</body>
</html>
Step 3: In code behind gridview.aspx.cs, copy and paste the following code.
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class gridview : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
List<string>result = new List<string>();
using (SqlConnection con = new SqlConnection("Data Source=yourserver;IntegratedSecurity=true;Initial Catalog=Northwind;UserId=yourusername;Password=yourpassword"))
{
DataSet ds = new DataSet();
using (SqlCommand cmd = new SqlCommand("select * from Region", con))
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
}
if (ds.Tables[0].Rows.Count > 0)
{
gvdetails.DataSource = ds;
gvdetails.DataBind();
}
}
}
}
Output: