ComboBox dynamic adding checkboxes to template

[Henrik Tegman]

Hello,

I've been searching the forums and found some similar topics but I still can't get it to work so I thought I'd post my own to see what I'm doing wrong.

My situation is simple, I have a ComboBox and I want the dropdown to have checkboxes, as I understand there is no easy way to just add a checkbox to a ComboBox, instead I have to use the ItemTemplate.

At the moment I have a class that uses the ITemplate, it has a InstantiateIn method and there it gets the "dynamic" data from a DB.

It looks something like this, don't mind the extra code it's still very early and just trying to get things to work:

public void InstantiateIn(Control container)
        {
            object[] searchoptions = GetProxy().GetSearchOptionList();
            DataSet so = (DataSet)searchoptions[0];
            List<SearchOption> searchOpt = new List<SearchOption>();
            for (int k = 0; k < so.Tables.Count; k++)
                for (int j = 0; j < so.Tables[k].Rows.Count; j++)
                {
                    SearchOption search = new SearchOption();
                    search.ID = so.Tables[k].Rows[j].ItemArray[0].ToString();
                    search.name = so.Tables[k].Rows[j].ItemArray[1].ToString();
                    searchOpt.Add(search);
                    CheckBox box = new CheckBox();
                    box.Text = search.name;
                    box.ID = search.ID;
                    box.DataBinding += new EventHandler(box_DataBinding);
                    container.Controls.Add(box);
                }
}

It simply loops over it and takes out all the data, and attaches a Eventhandler

private void box_DataBinding(object sender, EventArgs e)
        {
            CheckBox target = (CheckBox)sender;
            RadComboBoxItem item = (RadComboBoxItem)target.BindingContainer;
            string itemText = (string)DataBinder.Eval(item, "Text");
            target.Text = itemText;
        }

But this doesn't work, the biggest problem is that I don't really get it myself why I have to go on with Templates and all this, I just want a dropdown with checkboxes, so maybe I'm overcomplicating things here or maybe I just don't understand.

Any help is welcome.

[Helen]

Hi Henrik,

Did you review the following help topic:

http://www.telerik.com/help/aspnet-ajax/combo_templatesaddingtemplates.html?

Did you try to follow the code in the "Assigning ItemTemplate at runtime" section?

Regards,
Helen
the Telerik team