RadComboBox dynamic multicolumn in user control for radgrid

[Kevin]

Okay so here's the problem I am having.  I am wanting to show a multicolumn radcombobox in a radgrid from a custom inline edit form (user control).  I can get it to work fine on a page but from what I can tell when you run the same code from a user control that is being referenced by a radgrid for CRUD.  What is happening is that the dynamic template that I am creating doesn't get applied until after that data is bound.  From the looks of it the page load doesn't get touched at all.  So from what I can tell I am trying to call a databind within a databind which is my problem.

So for the radgrid when you use a custom form you call most of your bindings in the

private void InitializeComponent()
{
    this.DataBinding += new System.EventHandler(this.RandomName_DataBound);
}

and then you can bind lists etc. in there.  This is not a problem.  I can even databind the combobox.  Where the problem comes in is when I want to databind with a multicolumn format on the combobox. 

ComboBox.ItemTemplate = new ItemTemplate();
ComboBox.ItemDataBound += ComboBox_ItemDataBound;
ComboBox.Width = Unit.Pixel(500);
ComboBox.AllowCustomText = true;
ComboBox.MarkFirstMatch = true;

ComboBox.DataSource = GetVendorList();
ComboBox.DataTextField = "Name";
ComboBox.DataBind();
foreach (RadComboBoxItem item in ComboBox.Items)
{
    item.DataBind();
}

The above code is in the system event handler databound method.

protected void RandomName_DataBound(object sender, EventArgs e)
{
    // do stuff here
}

The problem from what I can see is that the Template that I am creating isn't firing until after the data is bound to the grid so it doesn't format the multicolumns properly.

class ItemTemplate : ITemplate
{
    public void InstantiateIn(Control container)
    {
        Table table = new Table();
        table.Width = Unit.Percentage(100);
        TableRow mainRow = new TableRow();
        TableCell cell1 = new TableCell();
        cell1.Width = Unit.Percentage(40);
        cell1.DataBinding += new EventHandler(cell1_DataBinding);

        mainRow.Cells.Add(cell1);
        TableCell cell2 = new TableCell();
        cell2.DataBinding += new EventHandler(cell2_DataBinding);
        cell2.Width = Unit.Percentage(30);
        mainRow.Cells.Add(cell2);

        TableCell cell3 = new TableCell();
        cell3.DataBinding += new EventHandler(cell3_DataBinding);
        cell3.Width = Unit.Percentage(30);
        mainRow.Cells.Add(cell3);
        table.Rows.Add(mainRow);
        container.Controls.Add(table);
    }

    private void cell1_DataBinding(object sender, EventArgs e)
    {

        TableCell target = (TableCell)sender;
        RadComboBoxItem item = (RadComboBoxItem)target.BindingContainer;
        target.Text = (string)DataBinder.Eval(item, "Text");
    }

    private void cell2_DataBinding(object sender, EventArgs e)
    {
        TableCell target = (TableCell)sender;
        RadComboBoxItem item = (RadComboBoxItem)target.BindingContainer;
        target.Text = (string)DataBinder.Eval(item, "Attributes[\"Type\"]");
    }

    private void cell3_DataBinding(object sender, EventArgs e)
    {
        TableCell target = (TableCell)sender;
        RadComboBoxItem item = (RadComboBoxItem)target.BindingContainer;
        target.Text = (string)DataBinder.Eval(item, "Attributes[\"Phone\"]");
    }

}

Any help on a work around would be great.  I have gone through all of the forums and all of the different sections of the radgrid and radcombobox api to see if this was addressed and I didn't find anything.

Thanks,
Kevin

[Kevin]

bump for an answer

[Nencho]

Hello Kevin,

Unfortunately, we are unable to determine what might cause the experienced issue from the provided snippet of code. For that matter, I would like to ask you to open a support ticket, along with a runnable sample attached, reproducing the experienced issue.

Greetings,
Nencho
the Telerik team