Class GroupDescriptorBase

Serves as a base class for group descriptors. Holds SortDirection that will be used to sort the groups created from the descriptor.

Inheritance
System.Object
InheritanceContextPropagator
DescriptorBase
GroupDescriptorBase
ColumnGroupDescriptor
AggregatedGroupDescriptorBase
Inherited Members
Namespace: Telerik.Windows.Data
Assembly: Telerik.Windows.Data.dll

Syntax

public abstract class GroupDescriptorBase : DescriptorBase, ISuspendNotifications, IGroupDescriptor, INotifyPropertyChanged

Constructors

GroupDescriptorBase()

Declaration
protected GroupDescriptorBase()

Fields

DisplayContentProperty

Identifies the DisplayContent dependency property.

Declaration
public static readonly DependencyProperty DisplayContentProperty
Field Value
System.Windows.DependencyProperty

Properties

DisplayContent

Gets or sets the content which will be used to visually represent this descriptor.

Declaration
public virtual object DisplayContent { get; set; }
Property Value
System.Object

SortDirection

Gets or sets the sort direction for this descriptor. If the value is null no sorting will be applied.

Declaration
public virtual ListSortDirection? SortDirection { get; set; }
Property Value
System.Nullable<System.ComponentModel.ListSortDirection>

The sort direction. The default value is null.
Implements

Methods

CreateGroupKeyExpression(Expression)

Creates a group expression by delegating its creation to CreateGroupKeyExpression(ParameterExpression), if itemExpression is System.Linq.Expressions.ParameterExpression, otherwise throws System.ArgumentException

Declaration
public virtual Expression CreateGroupKeyExpression(Expression itemExpression)
Parameters
System.Linq.Expressions.Expression itemExpression

The instance expression, which will be used for grouping.
Returns
System.Linq.Expressions.Expression

Expression that creates group key for the given item.
Implements
Exceptions
System.ArgumentException

Parameter should be of type System.Linq.Expressions.ParameterExpression

CreateGroupKeyExpression(ParameterExpression)

Creates a group expression that returns the grouping key for each item in a collection.

Declaration
protected virtual Expression CreateGroupKeyExpression(ParameterExpression parameterExpression)
Parameters
System.Linq.Expressions.ParameterExpression parameterExpression

The parameter expression, which will be used for grouping.
Returns
System.Linq.Expressions.Expression

Expression that creates group key for the given item.

CreateGroupSortExpression(Expression)

Creates sorting key expression that sorts the groups created from this descriptor using the group's key.

Declaration
public virtual Expression CreateGroupSortExpression(Expression groupingExpression)
Parameters
System.Linq.Expressions.Expression groupingExpression

The grouping expression, which represents the grouped items created from the CreateGroupKeyExpression(Expression).
Returns
System.Linq.Expressions.Expression

Expression that represents the sort criteria for each group.
Implements

CycleSortDirection()

Changes the SortDescriptor to the next logical value.

Declaration
public void CycleSortDirection()

Extension Methods