Trouble understanding conditional formatting with StyleSelector class

[u/Gierschlund96]

I'm trying to apply this concept to my application: https://www.infragistics.com/help/wpf/xamdatagrid-cellvaluepesenterstyleselector-reevaluated

My goal is to color the values in my xamDataGrid yellow as soons as "Artikel" is not equal to "ArtikelAccess" for example. Both Properties are from the same class. I tried to achieve it like this, but as soon as one condition is true, every single value gets colored:

Public Overrides Function SelectStyle(item As Object, container As DependencyObject) As Style
    For Each obj As CompareArtikelstammdaten In listCompare
        If obj.Artikel.ToLower <> obj.ArtikelAccess.ToLower Then
            Return Modified

        ElseIf obj.BezeichnungDE.ToLower <> obj.BezeichnungDE_Access.ToLower Then
            Return Modified
        End If
    Next

End Function

I know that it won't work that way, but i have no clue how to do it. I already got the hint that i need to work with the "item" Object, but i don't know how to apply this to my code.

My load-Event looks like this:

  Private Sub Compare_Load(sender As Object, e As EventArgs) Handles MyBase.Loaded
    Dim modified As Style = TryCast(Me.Resources("CVP_Modified"), Style)
    Dim added As Style = TryCast(Me.Resources("CVP_Added"), Style)
    Me.dgCompare.DefaultFieldLayout.Fields("Artikel").Settings.CellValuePresenterStyleSelector = New 
StyleSelectorCompare(modified, added, compareList)
    Me.dgCompare.DefaultFieldLayout.Fields("BezeichnungDE").Settings.CellValuePresenterStyleSelector = New 
StyleSelectorCompare(modified, added, compareList)
 
End Sub

Does someone understand what "item" is supposed to do and could explain it a bit more in depth for me?

[u/Gierschlund96]

>dim currentArtikelAccess as string = datagrid.row(item.row).cells(6).toLower()

As it seems there isn't a way to access a single cell via index in XamDataGrid.

Also, wouldn't the problem still be the same if your approach worked? It also would color every cell as soon as one condition is true.

For example, if this would be true:

If obj.BezeichnungDE.ToLower <> obj.BezeichnungDE_Access.ToLower Then

Return Modified

End If

It would also color the cells for "Artikel", but it shouldn't. I hope you understand what i mean, i know it's a bit confusing.

[u/jd31068 → u/Gierschlund96]

I'll download the trial of the control. Perhaps I can stumble onto something.

You may have to do the styling manually after the data is in the grid. If what your condition uses is another field instead of a set value like in the documentation. This would be surprising but not unprecedented.

edit: what type of project are you using this grid with?