Composite DisplayMember for ComboBox

I need to display multiple pieces of data in a combobox, but I can't figure out how to do it.

Here's the code I'm trying to make work:

        innerBox.DisplayMember = @"t => t.TenantName + ""\t"" + t.Property.PropertyName + ""\t"" + t.RentalUnit.UnitNumber ";

But it doesn't work, this does though:

        innerBox.DisplayMem开发者_Python百科ber = @"t => t.TenantName";

How can I get the composite one to work?

This is not possible.

Instead, you should add a property to your underlying objects.

DisplayMember can contain only single property name! If you want composite output, you should subscribe to Format event and compose output string in code.

I wanted to have "[code] [text]' in DisplayMember and solved it by adding a property using linq:

var actionCodes = pps.GetAllActionCodes();
if (actionCodes != null)
{
    var actionCodesNew = (from c in actionCodes
                                select new
                                {
                                    c.Code,
                                    c.Text,
                                    CodeAndDesc = string.Format("{0} {1}", c.Code, c.Text).Trim()
                                }).ToArray();
            comboBox.Items.AddRange(actionCodesNew);
            comboBox.DisplayMember = "CodeAndDesc";
        }
}

Works ok when performance is not an issue. :)