IncludeUniqueValues プロパティ

データ プレゼンターは、フィルター ドロップダウンリストにデータ ソースからの固有フィールド値を含む必要があるかどうかを指定します。

シンタックス

Visual Basic

'宣言
 
Public Property IncludeUniqueValues As Boolean

C#

public bool IncludeUniqueValues {get; set;}

解説

このプロパティを False に設定して、データ プレゼンターがフィルター ドロップダウン リストにフィールド値を含めないことができます。

使用例

Visual Basic

Imports Infragistics.Windows
Imports Infragistics.Windows.Controls
Imports Infragistics.Windows.Editors
Imports Infragistics.Windows.DataPresenter
Imports Infragistics.Windows.DataPresenter.Events

    Private Sub Dp_RecordFilterDropDownPopulating(ByVal sender As Object, ByVal e As RecordFilterDropDownPopulatingEventArgs)
        If e.Field.EditAsTypeResolved Is GetType(String) Then
            ' At this point, e.DropDownItems will be pre-populated with special operands, like
            ' (Custom), (Blanks), (NonBlanks) etc... You can remove them if you don't want to
            ' display those options.
            ' 
            ' Remove all but (All) and (Custom) items from the drop-down.
            ' 
            Dim i As Integer
            For i = e.DropDownItems.Count - 1 To 0 Step -1
                ' Remove all but (All) and (Custom) items from the list.
                ' 
                If Not e.DropDownItems(i).DisplayText.StartsWith("(All)") _
                  AndAlso Not e.DropDownItems(i).DisplayText.StartsWith("(Custom)") Then
                    e.DropDownItems.RemoveAt(i)
                End If
            Next


            ' After this event is raised, data presenter will populate the drop-down with
            ' field values. If you don't want to display field values in the filter drop-down
            ' then set IncludeUniqueValues to false, which will prevent the data presenter
            ' from adding field values to the drop-down.
            ' 
            e.IncludeUniqueValues = False

            ' Add custom items. Items can be ICondition derived class (here we are using built-in
            ' ComparisonCondition), or a SpecialFilterBase derived class, or a ICommand (which
            ' lets you to take an action, like show a dialog). You can even implement your own 
            ' ICondition to provide completely custom logic.
            ' 
            Dim item As FilterDropDownItem
            item = New FilterDropDownItem(New ComparisonCondition(ComparisonOperator.Match, "^[A-F]"), "A-F")
            e.DropDownItems.Add(item)

            item = New FilterDropDownItem(New ComparisonCondition(ComparisonOperator.Match, "^[G-K]"), "G-K")
            e.DropDownItems.Add(item)

            item = New FilterDropDownItem(New ComparisonCondition(ComparisonOperator.Match, "^[L-P]"), "L-P")
            e.DropDownItems.Add(item)

            item = New FilterDropDownItem(New ComparisonCondition(ComparisonOperator.Match, "^[Q-Z]"), "Q-Z")
            e.DropDownItems.Add(item)
        End If
    End Sub

C#

using Infragistics.Windows;
using Infragistics.Windows.Controls;
using Infragistics.Windows.Editors;
using Infragistics.Windows.DataPresenter;
using Infragistics.Windows.DataPresenter.Events;

		private void dp_RecordFilterDropDownPopulating( object sender, RecordFilterDropDownPopulatingEventArgs e )
		{
			if ( e.Field.EditAsTypeResolved == typeof( string ) )
			{
				// At this point, e.DropDownItems will be pre-populated with special operands, like
				// (Custom), (Blanks), (NonBlanks) etc... You can remove them if you don't want to
				// display those options.
				// 
				// Remove all but (All) and (Custom) items from the drop-down.
				// 
				for ( int i = e.DropDownItems.Count - 1; i >= 0; i-- )
				{
					// Remove all but (All) and (Custom) items from the list.
					// 
					if ( ! e.DropDownItems[i].DisplayText.StartsWith( "(All)" )
						&& ! e.DropDownItems[i].DisplayText.StartsWith( "(Custom)" ) )
					{
						e.DropDownItems.RemoveAt( i );
					}
				}

				// After this event is raised, data presenter will populate the drop-down with
				// field values. If you don't want to display field values in the filter drop-down
				// then set IncludeUniqueValues to false, which will prevent the data presenter
				// from adding field values to the drop-down.
				// 
				e.IncludeUniqueValues = false;

				// Add custom items. Items can be ICondition derived class (here we are using built-in
				// ComparisonCondition), or a SpecialFilterBase derived class, or a ICommand (which
				// lets you to take an action, like show a dialog). You can even implement your own 
				// ICondition to provide completely custom logic.
				// 
				FilterDropDownItem item;
				item = new FilterDropDownItem( new ComparisonCondition( ComparisonOperator.Match, "^[A-F]" ), "A-F" );
				e.DropDownItems.Add( item );

				item = new FilterDropDownItem( new ComparisonCondition( ComparisonOperator.Match, "^[G-K]" ), "G-K" );
				e.DropDownItems.Add( item );

				item = new FilterDropDownItem( new ComparisonCondition( ComparisonOperator.Match, "^[L-P]" ), "L-P" );
				e.DropDownItems.Add( item );

				item = new FilterDropDownItem( new ComparisonCondition( ComparisonOperator.Match, "^[Q-Z]" ), "Q-Z" );
				e.DropDownItems.Add( item );
			}
		}