Checkbox column checkall uncheckall in DataGrid C#

Posted Date: 23 Aug 2008	Resource Type: Code Snippets	Category: DataGridView
Author: Tamanna	Member Level: Silver
Rating:	Points: 10

Following code will create a checkbox in HeaderTemplate and 1 checkbox in ItemTemplate.

<asp:DataGrid ID="DataGrid1" runat="server" AutoGenerateColumns="false" Width="100%" OnItemCommand="DataGrid1_ItemCommand1" OnSelectedIndexChanged="DataGrid1_SelectedIndexChanged1" Height="181px">
<Columns>
<asp:TemplateColumn>
<HeaderTemplate>
<input id="chkAll" type="checkbox" onclick="CheckAllDataGridCheckBoxes('chkItem',this)"/>
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkItem" runat="server"></asp:CheckBox>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>

Following code is to be written under head tag.
<script type="text/javascript">
function CheckAllDataGridCheckBoxes(aspCheckBoxID,checkVal)
{
var len=document.getElementsByTagName("input").length;
for(i = 0; i < len; i++)
{

if (document.getElementsByTagName("input")[i].type == 'checkbox')
{
document.getElementsByTagName("input")[i].checked=checkVal.checked

}
}
}
</script>

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