Adding checkbox in datagridview

Dear Sumit,

Sometimes this datagridview shows unusual behavior so from my side the solution could be:-

1) check whether the field is not read only.
2) try to unload the application and rebuild it and then re-run it.
3) Try to add new grid with same configuration.(but this must be the last option)

Hope this will help you out.

Thanks

use template field, for this not of inbuilt type check box column.

<asp:GridView ID="grdMain" runat="server" AutoGenerateColumns="False"  OnRowDataBound="grdMain_RowDataBound" OnRowCommand="grdMain_RowCommand">
     <Columns>
        <asp:TemplateField HeaderStyle-Height="25px" ItemStyle-Height="25px">
         <ItemTemplate>
        <asp:CheckBox ID="chkSelect" runat="server" />
     </ItemTemplate>
                           <HeaderStyle CssClass="GreenBorder" HorizontalAlign='left' />

                     </asp:TemplateField>
                      <asp:TemplateField>
                       <HeaderTemplate>
                                      Serial No.
              </HeaderTemplate>
 <ItemTemplate>
       <asp:Label ID="lblSerialNo" runat="server" Text='<%#Eval("Serial_No")%>'></asp:Label>
                            </ItemTemplate>

</asp:TemplateField>
</Columns>
</asp:GridView>

use like this , Hope this will help you.
Don't froget to mark as answer if it helps. :)

Try this URL...............................Selecting multiple checkboxes inside a GridView control[^]