Question

I have this code in .aspx page

<gridview .....
  <columns>
 ............ 
 ...........
<asp:templatefield Visible="true" headertext="Title" >
<edititemtemplate>
        <asp:checkbox id="chkTitle" runat="server" />
</edititemtemplate>
</asp:templatefield>

<asp:commandfield buttontype="Link" edittext="Edit" showeditbutton="true"/>
 </columns>
 </gridview>

i only want to show the column when the user clicks on Edit button to edit the row.

Answer 1

In your GV Data Bound Event Handler (not row data bound):

For i As Integer = 0 To GridView1.Rows.Count - 1
     If GridView1.EditIndex = -1 Then
         GridView1.Rows(i).Cells(0).Visible = False
     else
         GridView1.Rows(i).Cells(0).Visible = true
     end if
Next

If GridView1.EditIndex = -1 Then
    GridView1.HeaderRow.Cells(0).Visible = False
End If

Source