Hi there, I need your appreciated help.

My problem is show always to all the GridView and the column HeaderText="Image" show exclusively for the users with Cookies is not 'null' and have `1` value.

I follow this approch: would be to give a HeaderText for TemplateField, say Image, and then find using that and try this code.

I don't have error but the `TemplateField` Image is always visible.

Thanks for your time and hints.

Code:
<script runat="server">
public void Page_Load (Object sender, EventArgs e)
{
    OdbcConnection myConnectionString = new OdbcConnection(
   ConfigurationManager.ConnectionStrings["ConnMySQL"].ConnectionString);
    myConnectionString.Open();

    myConnectionString.Close();
    myConnectionString.Dispose();
    
    lblMessage.Text = "";

    if (Request.Cookies["name"] != null)
    {
        string fld = Request.Cookies["name"].Value;
        Response.Write("My Cookie is ...<br>");
        Response.Write(fld + "<br>");

    }
    else
    {
        Response.Write("Cookie not valid ...<br>");
    }

 }

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
    
    (
       (DataControlField)GridView1.Columns
             .Cast<DataControlField>()
             .Where(fld => fld.HeaderText == "Image")
             .SingleOrDefault()
    ).Visible = false;
} 
</script>

<asp:TemplateField HeaderText="Image"> 

    <ItemTemplate>
      <asp:ImageButton ID="ImageButton1" CommandName="Edit" Runat="Server"
      ImageUrl="/Images/edit.gif" ToolTip="edit" 
      OnClientClick="return confirm('Confirm?.');" />
    </ItemTemplate>

    <EditItemTemplate>
      <asp:ImageButton ID="ImageButton2" CommandName="Update" Runat="Server"
      ImageUrl="/Images/update.gif" ToolTip="update"
      OnClientClick="return confirm('Confirm?.');" /> 

      <asp:ImageButton ID="ImageButton3" CommandName="Delete" Runat="Server"
      ImageUrl="/Images/delete.gif" ToolTip="delete"
      OnClientClick="return confirm('Confirm?.');" />
    </EditItemTemplate>

  </asp:TemplateField>