ItemsProvider プロパティ

Visual Basic
C#

'宣言
 
Public Property ItemsProvider As ComboBoxItemsProvider

public ComboBoxItemsProvider ItemsProvider {get; set;}

ItemsProvider プロパティはドロップダウンに表示される項目を指定するために使用されます。の新しいまたは既存のインスタンスにこのプロパティを設定できます。表示される項目を ComboBoxItemsProvider インスタンスに移植します。ドロップダウン項目がこれらの XamComboEditors で同じ場合、ComboBoxItemsProvider インスタンスは効率性のために複数の XamComboEditor インスタンスに指定できます。ComboBoxItemsProvider オブジェクトは項目と項目ソースへのバインディングを管理するオブジェクトです。

ComboBoxItemsProvider

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

参照

XamComboEditor クラス
 XamComboEditor メンバ

WPF | ヘルプ トピック

参照

WPF | ヘルプトピック