UserControl causing loss of textbox content in Gridview header

Question

All,

My problem is that my gridview header that contains textboxes etc. that users can type into is somehow losing the content of those textboxes when the user forces a postback - but only if I have a user control in the header. This is using .NET 2.0.

I've created a basic gridview that binds to a generic list datasource. I've added a simple user control (wrap a text box) into the header and I update the text of this this during the RowCreated event (my actual code is not that simple, this is just a test).

In the RowCreated event I can reference my user control fine and the normal textboxes retain values (regardless of whether the gridview as Viewstate on or off NB: I rebind each time if viewstate is off). However, the moment I access the usercontrol properties the normal textboxes lose any content and are redisplayed as empty.

I am totally stumped. This must be a bug, but I can't find it anywhere.

Example code:

    protected void grdList_RowCreated(object sender, GridViewRowEventArgs e)
    {
        switch (e.Row.RowType)
        {
            case DataControlRowType.Header:
                TextBoxWrapper tbw = (TextBoxWrapper)e.Row.FindControl("utxWrapper");
                TextBox txn = (TextBox)e.Row.FindControl("txtClientId");
                txn.Text = tbw.ClientId;

                break;
        }
    }

Remove the "txn.Text = tbw.ClientId;" and the code is fine. NB: tbw is not null, i.e. it does contain a reference.

Grid definition:

<asp:GridView ID="grdList" runat="server" DataKeyNames="Id" AutoGenerateColumns="false" OnRowCreated="grdList_RowCreated" OnRowCommand="grdList_RowCommand" ShowFooter="true" EnableViewState="false">

Answer 1

Having the same issue, I believe this is a MS bug, they don't persist these items. And why should they want to.