Sorting on Object columns

[Carl Rippon]

Sorting on Object columns doesn't seem to work. To recreate the problem:

• Paste the following code into the code behind of MainPage in a blank silverlight project
• Run the application
• Click on the header of the Name column (which is of type Object) - this does NOT work
• Click on the header of the NameString column (which is of type String) - this does work

Is this a bug or am I missing something?

Partial Public Class MainPage
    Inherits UserControl

    Public Sub New()
        InitializeComponent()

        Dim RadGridView1 As New Telerik.Windows.Controls.RadGridView
        RadGridView1.AutoGenerateColumns = False
        RadGridView1.Columns.Add(New GridViewDataColumn With {.DataMemberBinding = New Binding("Name"), .Header = "Name"})
        RadGridView1.Columns.Add(New GridViewDataColumn With {.DataMemberBinding = New Binding("NameString"), .Header = "NameString"})
        RadGridView1.ItemsSource = GetListData()
        LayoutRoot.Children.Add(RadGridView1)
    End Sub

    Private Function GetListData() As List(Of Item)
        Dim build As New List(Of Item)
        build.Add(New Item With {.Name = "Tom", .NameString = "Tom"})
        build.Add(New Item With {.Name = "Fred", .NameString = "Fred"})
        build.Add(New Item With {.Name = "Bill", .NameString = "Bill"})
        Return build
    End Function

    Public Class Item
        Public Property Name As Object
        Public Property NameString As String
    End Class

End Class

[Maya]

Hi Carl Rippon,

 
That is the expected behavior as in order to enable sorting, the source for the column should implement either IComparable Interface or IEquatable Interface.

Kind regards,
Maya
the Telerik team

[Carl Rippon]

Thanks, that makes sense!