ConditionGroup クラス

複数の条件のグループ化に使用されるクラスです。

シンタックス

Visual Basic

'宣言
 
Public Class ConditionGroup 
   Inherits System.Collections.ObjectModel.ObservableCollection(Of ICondition)
   Implements ICondition 

C#

public class ConditionGroup : System.Collections.ObjectModel.ObservableCollection<ICondition>, ICondition  

解説

複数の条件のグループ化に使用される ConditionGroup クラスです。ConditionGroup 自身が ICondition インターフェイスを実装するため、条件がネスト化されたグループを任意に作成できます。

条件グループに含まれる条件は、LogicalOperator プロパティによって指定された論理演算子を使用して統合されます。

使用例

The following code adds a RecordFilter for 'Percent' field. The record filter is populated with two conditions. The 'Conditions' property of the RecordFilter is of ConditionGroup type, which has a 'LogicalOperator' property that specifies whether to combine the conditions in the group using 'Or' or 'And' logical operation. The following code snippet sets the LogicalOperator to 'Or'.

Visual Basic

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

    Private Sub Window1_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
        
        Dim fieldLayout As FieldLayout = _dp.FieldLayouts(0)

        ' Create a filter that shows 'Percent' field where the values are less than 0
        ' or greater than 100.
        Dim filter As RecordFilter = New RecordFilter()
        filter.FieldName = "Percent"
        filter.Conditions.Add(New ComparisonCondition(ComparisonOperator.LessThan, 0))
        filter.Conditions.Add(New ComparisonCondition(ComparisonOperator.GreaterThan, 100))

        ' By default the LogicalOperator is 'And'. Since we want to 'Or' the above two
        ' conditions, set the LogicalOperator on the condition group to 'Or'.
        filter.Conditions.LogicalOperator = LogicalOperator.Or

        ' Apply the filter to the data presenter.
        fieldLayout.RecordFilters.Add(filter)

    End Sub

The following code adds a RecordFilter for 'Percent' field. The record filter is populated with two conditions. The 'Conditions' property of the RecordFilter is of ConditionGroup type, which has a 'LogicalOperator' property that specifies whether to combine the conditions in the group using 'Or' or 'And' logical operation. The following code snippet sets the LogicalOperator to 'Or'.

C#

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

		public void Window1_Loaded( object sender, RoutedEventArgs e )
		{
			FieldLayout fieldLayout = _dp.FieldLayouts[0];

			// Create a filter that shows 'Percent' field where the values are less than 0
			// or greater than 100.
			RecordFilter filter = new RecordFilter( );
			filter.FieldName = "Percent";
			filter.Conditions.Add( new ComparisonCondition( ComparisonOperator.LessThan, 0 ) );
			filter.Conditions.Add( new ComparisonCondition( ComparisonOperator.GreaterThan, 100 ) );

			// By default the LogicalOperator is 'And'. Since we want to 'Or' the above two
			// conditions, set the LogicalOperator on the condition group to 'Or'.
			filter.Conditions.LogicalOperator = LogicalOperator.Or;

			// Apply the filter to the data presenter.
			fieldLayout.RecordFilters.Add( filter );
		}

The following code snippet adds a ConditionGroup with two conditions to the RecordFilter of 'Percent' field. The LogicalOperator on the condition group is set to 'Or' to combine the conditions using 'Or' instead of the default 'And' logical operation.

XAML

        <igDP:XamDataGrid x:Name="_dp" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" >

            <igDP:XamDataGrid.FieldLayouts>
                
                <igDP:FieldLayout IsDefault="true">

                    <igDP:FieldLayout.RecordFilters>
                        <igDP:RecordFilter FieldName="Percent">
                            <!--Add a condition group with two conditions. By default the conditions will be
                            combined using 'And' logical operator. Set LogicalOperator to 'Or' to combine the
                            conditions in the group using 'Or' logical operator.-->
                            <igWindows:ConditionGroup LogicalOperator="Or">
                                <igWindows:ComparisonCondition Operator="LessThan" Value="0" />
                                <igWindows:ComparisonCondition Operator="GreaterThan" Value="100" />
                            </igWindows:ConditionGroup>
                        </igDP:RecordFilter>
                    </igDP:FieldLayout.RecordFilters>
                    
                </igDP:FieldLayout>
                
            </igDP:XamDataGrid.FieldLayouts>
            
        </igDP:XamDataGrid>