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FilterDescriptorLogicalOperator Enumeration

[WCF RIA Services Version 1 Service Pack 2 is compatible with either .NET framework 4 or .NET Framework 4.5, and with either Silverlight 4 or Silverlight 5.]

Defines values that represent logical operators for filter collections.

Namespace:  System.Windows.Controls
Assembly:  System.Windows.Controls.DomainServices (in System.Windows.Controls.DomainServices.dll)

Syntax

'Declaration
Public Enumeration FilterDescriptorLogicalOperator
'Usage
Dim instance As FilterDescriptorLogicalOperator
public enum FilterDescriptorLogicalOperator
public enum class FilterDescriptorLogicalOperator
type FilterDescriptorLogicalOperator
public enum FilterDescriptorLogicalOperator

Members

Member name Description
And Filters are combined by using the AND operator.
Or Filters are combined by using the OR operator.

Remarks

You apply a FilterDescriptorLogicalOperator value to the FilterOperator property on the DomainDataSource class.

Examples

The following example shows two filter descriptors that are connected by a logical AND operator. One filter depends on user input and one filter is specified in the declarative syntax.

<Grid x:Name="LayoutRoot" Background="White">  
    <Grid.RowDefinitions>
        <RowDefinition Height="25" />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <riaControls:DomainDataSource x:Name="source" QueryName="GetProducts" AutoLoad="true">
        <riaControls:DomainDataSource.DomainContext>
            <domain:ProductDomainContext />
        </riaControls:DomainDataSource.DomainContext>   
        <riaControls:DomainDataSource.FilterDescriptors>
            <riaData:FilterDescriptorCollection LogicalOperator="And">
              <riaData:FilterDescriptor PropertyPath="Color" Operator="IsEqualTo" Value="Blue" />
              <riaData:FilterDescriptor PropertyPath="ListPrice" Operator="IsLessThanOrEqualTo">
                  <riaControls:ControlParameter 
                      ControlName="MaxPrice" 
                      PropertyName="SelectedItem.Content" 
                      RefreshEventName="SelectionChanged" />
              </riaData:FilterDescriptor>
            </riaData:FilterDescriptorCollection>
        </riaControls:DomainDataSource.FilterDescriptors>
    </riaControls:DomainDataSource>
    <ComboBox x:Name="MaxPrice" Grid.Row="0" Width="60" SelectedIndex="0">
        <ComboBoxItem Content="100" />
        <ComboBoxItem Content="500" />
        <ComboBoxItem Content="1000" />
    </ComboBox>
    <data:DataGrid Grid.Row="1" ItemsSource="{Binding Data, ElementName=source}" />
</Grid>

See Also

Reference

System.Windows.Controls Namespace