Items Property (ComboBoxItemsProvider)

Visual Basic
C#

'Declaration
 
Public ReadOnly Property Items As ItemCollection

public ItemCollection Items {get;}

See ItemsSource for more information on how to specify items for the XamComboEditor's drop-down.

The following shows how to use the XamComboEditor in various ways

XAML

C#

using Infragistics.Windows.Editors;
using Infragistics.Windows.DataPresenter;


    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();

            // the first XamComboEditor is using the ItemsProvider defined as a shared 
            // resource in xaml

            this.XamComboEditor1.ItemsProvider = this.Resources["ComboItemsProvider"] as ComboBoxItemsProvider;
            this.XamComboEditor1.DropDownButtonDisplayMode = DropDownButtonDisplayMode.Always;
            this.XamComboEditor1.SelectedItemChanged += new RoutedPropertyChangedEventHandler<object>(XamComboEditor1_SelectedItemChanged);

            // the second XamComboEditor is defining its own ItemsProvider and
            // making use of the ComboBoxDataItem helper class to easily define
            // a separate DisplayText and Value for each item. Alternatively,
            // you can set the ItemsSource to any IEnumerable and set the 
            // DisplayMemberPath and ValuePath properties to achieve the same effect. 

            ComboBoxItemsProvider provider = new ComboBoxItemsProvider();
            for (int i = 0; i < 6; i++)
                provider.Items.Add( new ComboBoxDataItem(i, "Item " + i.ToString()));

            this.XamComboEditor2.ValueType = typeof(int);
            this.XamComboEditor2.ItemsProvider = provider;

            // The following shows a XamDataGrid that adds an unbound field that
            // sets its EditorStyle to a XamComboEditor that uses the same shared
            // ItemsProvider that was defined in xaml. This leverages the significant 
            // speed and memory footprint advantages of using a single shared 
            // ItemsProvider for each record in the XamDataGrid. Note: this can
            // also be used for standard bound Fields as well.

            UnboundField fld = new UnboundField();
            fld.Name = "Visibility Setting";
 
            Style style = new Style(typeof(XamComboEditor));
            style.Setters.Add(new Setter(XamComboEditor.ItemsProviderProperty, new DynamicResourceExtension("ComboItemsProvider")));
            fld.Settings.EditorStyle = style;
            fld.Settings.EditorType = typeof(XamComboEditor);

            FieldLayout fieldLayout = new FieldLayout();
            fieldLayout.Fields.Add(fld);
            this.XamDataGrid1.FieldLayouts.Add(fieldLayout);
            this.XamDataGrid1.BindToSampleData = true;
        }

        private void XamComboEditor1_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
        {

        }
    }

Visual Basic

Imports Infragistics.Windows.Editors
Imports Infragistics.Windows.DataPresenter


Class Window1

    Public Sub New()

        ' This call is required by the Windows Form Designer.
        InitializeComponent()

        ' Add any initialization after the InitializeComponent() call.

        ' the first XamComboEditor is using the ItemsProvider defined as a shared 
        ' resource in xaml
        Me.XamComboEditor1.ItemsProvider = TryCast(Me.Resources("ComboItemsProvider"), ComboBoxItemsProvider)
        Me.XamComboEditor1.DropDownButtonDisplayMode = DropDownButtonDisplayMode.Always
        AddHandler Me.XamComboEditor1.SelectedItemChanged, AddressOf XamComboEditor1_SelectedItemChanged

        ' the second XamComboEditor is defining its own ItemsProvider and
        ' making use of the ComboBoxDataItem helper class to easily define
        ' a separate DisplayText and Value for each item. Alternatively,
        ' you can set the ItemsSource to any IEnumerable and set the 
        ' DisplayMemberPath and ValuePath properties to achieve the same effect. 

        Dim provider As ComboBoxItemsProvider = New ComboBoxItemsProvider()
        For i As Int32 = 0 To 8
            provider.Items.Add(New ComboBoxDataItem(i, "Item " + i.ToString()))
        Next
        Me.XamComboEditor2.ValueType = GetType(Integer)
        Me.XamComboEditor2.ItemsProvider = provider

        ' The following shows a XamDataGrid that adds an unbound field that
        ' sets its EditorStyle to a XamComboEditor that uses the same shared
        ' ItemsProvider that was defined in xaml. This leverages the significant 
        ' speed and memory footprint advantages of using a single shared 
        ' ItemsProvider for each record in the XamDataGrid. Note: this can
        ' also be used for standard bound Fields as well.

        Dim fld As UnboundField = New UnboundField()
        fld.Name = "Visibility Setting"

        Dim styl As Style = New Style(GetType(XamComboEditor))
        styl.Setters.Add(New Setter(XamComboEditor.ItemsProviderProperty, New DynamicResourceExtension("ComboItemsProvider")))
        fld.Settings.EditorStyle = styl
        fld.Settings.EditorType = GetType(XamComboEditor)

        Dim fl As FieldLayout = New FieldLayout()
        fl.Fields.Add(fld)
        Me.XamDataGrid1.FieldLayouts.Add(fl)
        Me.XamDataGrid1.BindToSampleData = True

    End Sub

    Private Sub XamComboEditor1_SelectedItemChanged(ByVal sender As System.Object, ByVal e As System.Windows.RoutedPropertyChangedEventArgs(Of System.Object))

    End Sub
End Class

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

ComboBoxItemsProvider Class
ComboBoxItemsProvider Members
ItemsSource Property
XamComboEditor Class

WPF | Help Topics

Reference