Class GroupDescription

Base class for group descriptions. A GroupDescription describes how to divide the items in a collection into groups.

Inheritance
System.Object
GroupDescription
PropertyGroupDescription
Implements
System.ComponentModel.INotifyPropertyChanged
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: System.ComponentModel
Assembly: OpenSilver.dll
Syntax
public abstract class GroupDescription : INotifyPropertyChanged

Constructors

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GroupDescription()

Initializes a new instance of GroupDescription.

Declaration
protected GroupDescription()

Properties

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CustomSort

Set a custom comparer to sort groups using an object that implements IComparer.

Declaration
public IComparer CustomSort { get; set; }
Property Value
Type Description
System.Collections.IComparer
Remarks

Note: Setting the custom comparer object will clear previously set SortDescriptions.

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GroupNames

This list of names is used to initialize a group with a set of subgroups with the given names. (Additional subgroups may be added later, if there are items that don't match any of the names.)

Declaration
public ObservableCollection<object> GroupNames { get; }
Property Value
Type Description
System.Collections.ObjectModel.ObservableCollection<System.Object>
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SortDescriptions

Collection of Sort criteria to sort the groups.

Declaration
public SortDescriptionCollection SortDescriptions { get; }
Property Value
Type Description
SortDescriptionCollection

Methods

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GroupNameFromItem(Object, Int32, CultureInfo)

Return the group name(s) for the given item

Declaration
public abstract object GroupNameFromItem(object item, int level, CultureInfo culture)
Parameters
Type Name Description
System.Object item
System.Int32 level
System.Globalization.CultureInfo culture
Returns
Type Description
System.Object
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NamesMatch(Object, Object)

Return true if the names match (i.e the item should belong to the group).

Declaration
public virtual bool NamesMatch(object groupName, object itemName)
Parameters
Type Name Description
System.Object groupName
System.Object itemName
Returns
Type Description
System.Boolean
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OnPropertyChanged(PropertyChangedEventArgs)

A subclass can call this method to raise the PropertyChanged event.

Declaration
protected virtual void OnPropertyChanged(PropertyChangedEventArgs e)
Parameters
Type Name Description
System.ComponentModel.PropertyChangedEventArgs e

Events

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PropertyChanged

PropertyChanged event (per System.ComponentModel.INotifyPropertyChanged).

Declaration
protected virtual event PropertyChangedEventHandler PropertyChanged
Event Type
Type Description
System.ComponentModel.PropertyChangedEventHandler

Explicit Interface Implementations

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INotifyPropertyChanged.PropertyChanged

This event is raised when a property of the group description has changed.

Declaration
event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged
Returns
Type Description
System.ComponentModel.PropertyChangedEventHandler

Implements

System.ComponentModel.INotifyPropertyChanged

Extension Methods