GridDropDownColumn displays more space than needed for records

[Rob T]

Why does the GridDropDownColumn display larger than the count of items?

You can see what I mean here http://demos.telerik.com/aspnet-ajax/grid/examples/generalfeatures/columntypes/defaultcs.aspx

Check the RadComboBox Columns example.  You see 5 records in the combo, but the combo drop down extends another 4 or 5 records further of empty white space.

How do I fix this?

[Shinu]

Hello Rob,

You can set the dropdownlist height based on number of items (if it is less than a particular count) in list after accessing the control in ItemDataBound event. Here is an example for setting the dropdownlist height.

CS:

   protected void RadGrid1_ItemDataBound(object sender, Telerik.Web.UI.GridItemEventArgs e)
    {
        if (e.Item is GridEditableItem && e.Item.IsInEditMode)
        {
            GridEditableItem editItem = (GridEditableItem)e.Item;
            RadComboBox combo = (RadComboBox)editItem["dropdowncolumn"].Controls[0];
            int itemsCount = combo.Items.Count;
            combo.Height = Unit.Pixel(itemsCount*12);
        }
    }

-Shinu.

[Ben]

I'm running into this problem right now as well. Manually setting the height of the dropdownlist generally works but I've run into a ​case where it falls short. The drop down is getting populated with items where a few of them have enough text to cause the entry to line wrap, which ends up throwing off the resulting height of the dropdownlist. It's been a few years since this was posted. Is this still considered the best way to approach this problem in general and, if so, how would you recommend approaching this situation?

[Pavlina]

Hello,

If you are using the latest version of Telerik UI for ASP.NET AJAX and you encounter a problem with grid DropDownColumn it will be best to send us a sample project which we can test locally. Another option is to send us the problematic code so we can examine it and advice you further.

Regards,
Pavlina
Telerik