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Check, Uncheck all checkboxes of a gridview in header checkbox check change in javascript

This is asp.net article shows how to Check/Uncheck select/deselect child checkboxes of a table or gridview on header checkbox check change in asp.net through JavaScript.

Here is two example both are doing different - different work the code given below is for changing the check of all child checkbox of a table, gridview as header checkbox check change and the second code is for changing the check of  all checkboxes of the particular specific column as header checkbox check change.

Select, Deselect all checkbox inside gridview in header checkbox check change - JavaScript

<script>
 function SelectAllCheckboxes(objHeaderChk, grdId) {
 
   var IsChecked = objHeaderChk.checked;
   var tbl = document.getElementById(grdId);
   var items = tbl.getElementsByTagName('input');

   for (i = 0; i < items.length; i++) {
     if (items[i].type == "checkbox")      {
        if (items[i].checked != IsChecked) {
          items[i].click();
        }
      }
    }

 }
</script>

Calling -
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
  <asp:TemplateField>
      <HeaderTemplate>
          <asp:CheckBox ID="chkHeader1" Text="Header1" runat="server" onclick="SelectAllCheckboxes(this,'<%=GridView1.ClientID %>')"  />
      </HeaderTemplate>
      <ItemTemplate>
          <asp:CheckBox ID="chkRow1" runat="server" />
      </ItemTemplate>
  </asp:TemplateField>

   <asp:TemplateField>
      <ItemTemplate>
          <asp:CheckBox ID="chkRow2" runat="server" />
      </ItemTemplate>
  </asp:TemplateField>

  <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="50" />
</Columns>

</asp:GridView>


Try Live demo here :-
Id
111
222

333
444

555
666
777
888
999

Check, Uncheck all checkbox of specific column in header checkbox change of that column - JavaScript


<script>
 function SelectCheckboxes(headerChk, grdId, columnIndex) {
  
  var IsChecked = headerChk.checked;
  var tbl = document.getElementById(grdId);
  
   for (i = 1; i < tbl.rows.length; i++) {
     var curTd = tbl.rows[i].cells[columnIndex];
     var item = curTd.getElementsByTagName('input');
     for (j = 0; j < item.length; j++) {
       if (item[j].type == "checkbox") {
          if (item[j].checked != IsChecked) {
              item[j].click();
          }
      }
    }
   }

 }
</script>

Calling -
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
 <Columns>
  <asp:TemplateField>
      <HeaderTemplate>
          <asp:CheckBox ID="chkHeader1" Text="Header1" runat="server" onclick="SelectCheckboxes(this,'<%=GridView1.ClientID %>', 0)"  />
      </HeaderTemplate>
      <ItemTemplate>
          <asp:CheckBox ID="chkRow1" runat="server" />
      </ItemTemplate>
  </asp:TemplateField>

      <asp:TemplateField>
      <HeaderTemplate>
          <asp:CheckBox ID="chkHeader2" Text="Header2" runat="server" onclick="SelectCheckboxes(this,'<%=GridView1.ClientID %>', 1)"  />
      </HeaderTemplate>
      <ItemTemplate>
          <asp:CheckBox ID="chkRow2" runat="server" />
      </ItemTemplate>
  </asp:TemplateField>

  <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="150" />
 </Columns>

</asp:GridView>

Try live demo here :-
Id
111
222
333
444
555
666
777
888
999

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