Sorting Value Converted Template Columns

3 posts, 0 answers
  1. Brian
    Brian avatar
    2 posts
    Member since:
    May 2009

    Posted 04 Jun 2012 Link to this post

    I have successfully bound a template column with some value conversion. The value converter extracts a value from the raw string to display in the column template.

    The problem is - if I sort the grid by this column or any other column the converted value does not change. Basically - the display doesnt change. The underlying value (Raw) does change....

    Is there a way to force a refresh of the display in the cell template?

    Couple of restrictions - the dataset and its contents are 100% dynamic, I do not know at run time if I'm going to use this column/cell template.

    Here is the code behind for my column binding:

    Dim sStyleString As String
                        sStyleString = "<Style TargetType=""grid:GridViewCell"" xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation"" " & _
                                        "xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml"" " & _
                                        "xmlns:Results=""clr-namespace:SL.Product.ReportResult;assembly=SL.Product.ReportResult"" " & _
                                        "xmlns:grid=""clr-namespace:Telerik.Windows.Controls.GridView;assembly=Telerik.Windows.Controls.GridView"" >" & _
                                        "<Setter Property=""Template"">" & _
                                        "<Setter.Value>" & _
                                        "<ControlTemplate>" & _
                                        "<Border BorderThickness=""0,0,1,1"" BorderBrush=""#FFD2CFCF"">" & _
                                        "<Results:GridDrillDownButton SourceReportID=""" & ReportID & """ DisplayContent=""{Binding " & repfield.RenamedField & "}"" />" & _
                                        "</Border>" & _
                                        "</ControlTemplate>" & _
                                        "</Setter.Value>" & _
                                        "</Setter>" & _
                                        "</Style>"
                        Dim s1 As System.Windows.Style = DirectCast(System.Windows.Markup.XamlReader.Load(sStyleString), System.Windows.Style)
                        column.SortMemberPath = repfield.RenamedField
                        column.CellStyle = s1


    Here is the code behind on GridDrillDownButton

    Imports Telerik.Windows.Controls
    Imports SL.Product.UIHelper
     
     
    Partial Public Class GridDrillDownButton
        Inherits UserControl
        Public DisplayContentProperty As DependencyProperty = DependencyProperty.Register("DisplayContent", GetType(String), GetType(GridDrillDownButton), Nothing)
        Public SourceReportProperty As DependencyProperty = DependencyProperty.Register("SourceReportID", GetType(String), GetType(GridDrillDownButton), Nothing)
     
     
        Private switch As Boolean
        Private oRadWindow As Telerik.Windows.Controls.RadWindow
     
     
        Public Property SourceReportID() As String
            Get
                Return GetValue(SourceReportProperty)
            End Get
            Set(ByVal value As String)
                SetValue(SourceReportProperty, value)
            End Set
        End Property
     
     
        Public Property DisplayContent() As String
            Get
                Return GetValue(DisplayContentProperty)
            End Get
            Set(ByVal value As String)
                SetValue(DisplayContentProperty, value)
            End Set
        End Property
     
     
        Public Sub New()
            InitializeComponent()
        End Sub
     
     
     
     
        Private Sub lnkDisplay_Click(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles lnkDisplay.Click
            Try
                If Not String.IsNullOrEmpty(DisplayContent) Then
                    If SourceReportID = "" Then
                        MessageBox.Show("You must save your report first before you can click the Drill Down field.", "Warning", MessageBoxButton.OK)
                        Exit Sub
                    End If
                    Dim oResultWindow As New SL.Product.ReportResult.ReportResult(SourceReportID, DisplayContent)
                    oRadWindow = New RadWindow
                    oRadWindow.Style = SL.Product.SharedDataLibrary.GlobalUIElements.ProductRadWindowTransparentStyle
     
     
                    oRadWindow.Height = UIElementHelper.MainGrid.ActualHeight - 50
                    oRadWindow.Width = UIElementHelper.MainGrid.ActualWidth - 50
                    oRadWindow.WindowState = WindowState.Normal
                    oRadWindow.ResizeMode = ResizeMode.NoResize
                    oRadWindow.CanMove = False
                    oRadWindow.WindowStartupLocation = WindowStartupLocation.CenterOwner
     
     
                    oRadWindow.Content = oResultWindow
     
     
                    oRadWindow.ShowDialog()
                    ' oResultWindow.ShowResultWindow()
                End If
            Catch ex As Exception
     
     
            End Try
        End Sub
     
     
        Private Sub lnkDisplay_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles lnkDisplay.Loaded
            Try
                Dim aryBoundString() As String = Split(DisplayContent, "||")
                'validate
                '0 = TargetReportID
                '1 = Fields Array
                '2 = Use Criteria
                '3 = Display Value
                Dim aryTemp() As String = Split(aryBoundString(3), "=")
                lnkDisplay.Content = String.Empty
                If aryTemp(0).ToUpper = "DISPLAY" Then lnkDisplay.Content = aryTemp(1).ToString
            Catch ex As Exception
                lnkDisplay.Content = String.Empty
                ToolTipService.SetToolTip(lnkDisplay, "Error Processing Display Value: " & ex.Message)
            End Try
        End Sub
     
     
        
       
    End Class



    I would appreciate any tips to get me moving in the right direction
  2. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 05 Jun 2012 Link to this post

    Hi,

     You should implement INotifyPropertyChanged for your data items and raise PropertyChanged when you change a property value. If the UI is TwoWay bound to this property you will get immediate refresh. 

    Greetings,
    Vlad
    the Telerik team

    Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>

  3. Brian
    Brian avatar
    2 posts
    Member since:
    May 2009

    Posted 05 Jun 2012 Link to this post

    So far this has not been the solution as it appears the property value "DisplayContent" of the Cell Item doesn't change....it is apparently sorted as it should (without re-assignment of the property in the cell item template for each row)

    The issue looks higher up...the grid does not seem to be redrawing the column contents. All other cells in the row sort and visibly change order....but these template bound cells appear the same...even though the underlying object reflects the change in sort.



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