ComboBox not displaying concatenated columns

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I'm using the following code to load a combobox:

C#

string sql = @"SELECT FilmID, Vendor.VendorName || ' ' || Film.Model, Film.Active ";
           sql = sql + @"FROM Film JOIN Vendor ";
           sql = sql + @"USING (VendorID) ";
           sql = sql + @"WHERE Film.Active = 1 OR Film.Active = 'True' ";
           sql = sql + @"ORDER BY Vendor.VendorName, Film.Model";

           SQLiteCommand com = new SQLiteCommand(sql, conn);
           dataTable = new DataTable("Film");
           SQLiteDataAdapter ad = new SQLiteDataAdapter(sql, conn);
           ad.Fill(dataTable);
           dataTable.Rows.Add(99999, eesConstants.EESADDEDIT);
           this._dataSet.Tables.Add(dataTable);
           this.comboboxSessionAnalogFilm.ItemsSource = this._dataSet.Tables["Film"].DefaultView;
           this.comboboxSessionAnalogFilm.DisplayMemberPath = this._dataSet.Tables["Film"].Columns[1].ToString();

I have verified that Column[1] is Vendor.VendorName || ' ' || Film.Model

If I change the DisplayMemberPath to Column[0] (FilmID), or Column[2] (Active) the combobox is updated with that data.

I'm not having any problem with tables that don't have concatenated columns.

Is there a way around this?

Thank you.

Posted 30-Sep-15 9:41am

Robert Kamarowski

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Wendelius · Accepted Answer · 2015-09-30T09:49:00

You didn't post the XAML but based on the query I'd say the problem is that you don't define an alias for the concatenated column. Because of this it will have some default name.

Try the following query

C#

string sql = @"
SELECT FilmID, 
       Vendor.VendorName || ' ' || Film.Model AS CompleteName, 
       Film.Active 
FROM Film JOIN Vendor 
USING (VendorID) 
WHERE Film.Active = 1 
OR    Film.Active = 'True' 
ORDER BY Vendor.VendorName, Film.Model";

and in XAML define the DisplayMemberPath to "CompleteName"