Question

I have a gridview that I have added a checkbox column using a templatefield (I want the user to be able to check/uncheck the box. I want to be able to populate the checkboxes, but when I try to cast the column as a Checkbox on the RowDataBound event, it errors. I also can’t do a FindControl due to the Masterpage (I think)

Any help would be appreciated!

The RowDataBound:

if (e.Row.RowType == DataControlRowType.DataRow) {

  var RowData = (ResponderResultViewClass)e.Row.DataItem;    // This control never gets found (due to the Masterpage I think)   CheckBox chkBox = (CheckBox)e.Row.FindControl('chkCertified');    // This throws an error saying 'Can't convert LiteralControl to Checkbox   CheckBox cb = (CheckBox)e.Row.Cells[4].Controls[0]; 

Here is the aspx code:

<asp:BoundField DataField='AnswerID' ControlStyle-Width='0' /> <asp:BoundField DataField='QuestionText' HeaderText='Question' /> <asp:BoundField DataField='AnswerText' HeaderText='Answer' ItemStyle-HorizontalAlign='Center' /> <asp:BoundField DataField='QualifyingGroupName' HeaderText='Qualifying Group' /> <asp:TemplateField HeaderText='Cert'>     <ItemStyle HorizontalAlign='Center' />         <ItemTemplate>             <asp:CheckBox ID='chkCertified' runat='server' />     </ItemTemplate> </asp:TemplateField> 

Answer 1

Controls[0] isn’t the checkbox. ASP.NET will stick some HTML content in there as a LiteralControl, you’ll need to look to see which index is your checkbox or stick with FindControl.

If you are just trying to bind the true/false to the checkbox, you can do so like this in your template column:

<asp:TemplateField HeaderText='Cert'>     <ItemStyle HorizontalAlign='Center' />     <ItemTemplate>         <asp:CheckBox ID='chkCertified' runat='server' Checked='<%# Eval('IsChecked') %>' />     </ItemTemplate> </asp:TemplateField> 

Where IsChecked is a property on your bound object.