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//this.ultraCombo1.DataBindings.Add("Enabled", _viewModel, "ComboboxEnabled", true, DataSourceUpdateMode.OnPropertyChanged);
      
var columns = new NameValueCollection();
// ultraCombo1
this.ultraCombo1.DataSource = _viewModel.Personen.Where(row => (row.Id != 0)).ToList();
this.ultraCombo1.ValueMember = "Id";
this.ultraCombo1.DisplayMember = "Name";
this.ultraCombo1.SyncWithCurrencyManager = true;
this.ultraCombo1.DataBindings.Add("Value", _viewModel, "Id", true, DataSourceUpdateMode.OnPropertyChanged);

spalten.Clear();
spalten.Add("Code", "Code");
spalten.Add("Name", "Name");

UltraComboHandler.SetColumnsFilter(this.ultraCombo1, columns, false, true);
this.ultraCombo1.DisplayLayout.Bands[0].SortedColumns.Add("Code", false);
this.ultraCombo1.DropDownWidth = this.ultraCombo1.Right - ultraCombo1.Left;
this.ultraCombo1.DisplayLayout.AutoFitStyle = Infragistics.Win.UltraWinGrid.AutoFitStyle.ExtendLastColumn;