<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>check uncheck all checkboxes in gridview</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>
<script type="text/javascript">
$(document).ready(function() {
$('[id$=chkHeader]').click(function() {
$("[id$='chkChild']").attr('checked', this.checked);
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="gv" runat="server">
<HeaderStyle BackColor="#444" />
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="chkHeader" runat="server" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkChild" runat="server"/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
ADO.net ::
if (!this.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Name"), new DataColumn("Country") });
dt.Rows.Add("John Hammond", "Canada");
dt.Rows.Add("Rick Stewards", "United States");
dt.Rows.Add("Huang He", "China");
dt.Rows.Add("Mudassar Khan", "India");
gvUserInfo.DataSource = dt;
gvUserInfo.DataBind();
}
