Custom grouping and sorting

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#17801 |

This example demonstrates how to create a custom group description by deriving from the DataGridGroupDescription class and overriding the GroupNameFromItem method. The custom group description will group items according to the first letter in the value received as a parameter.

The implementation for the custom sort comparer assigned to the group description’s SortComparer property is provided below.

VB.NET Imports System Imports System.Collections.Generic Imports System.Text Imports Xceed.Wpf.DataGrid Imports System.Collections Imports System.Globalization; Namespace Xceed.Wpf.Documentation   Public Class AlphabeticalGroupDescription          Inherits DataGridGroupDescription     Public Sub New()       MyBase.New()     End Sub     Public Sub New(ByVal propertyName As String)      MyBase.New(propertyName)     End Sub     Public Overrides Function GroupNameFromItem(ByVal item As Object, _                                                 ByVal level As Integer, _                                                 ByVal culture As CultureInfo) As Object       Dim value As Object = MyBase.GroupNameFromItem(item, level, culture)       Try         Dim content As String = Convert.ToString(value)         value = content.ToUpper().Substring(0, 1)       Catch e1 As InvalidCastException       End Try       Return value     End Function   End Class End Namespace C# using System; using System.Collections.Generic; using System.Text; using Xceed.Wpf.DataGrid; using System.Collections; namespace Xceed.Wpf.Documentation {   public class AlphabeticalGroupDescription : DataGridGroupDescription   {     public AlphabeticalGroupDescription()       : base()     {     }     public AlphabeticalGroupDescription( string propertyName )       : base( propertyName )     {     }         public override object GroupNameFromItem( object item, int level,                                               System.Globalization.CultureInfo culture )     {       object value = base.GroupNameFromItem( item, level, culture );       try       {         string content = Convert.ToString( value );    &nbsp Imported from legacy forums. Posted by Xceed admin (had 1341 views)

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