Grid data ghosting problems when scrolling

[Kristjan Einarsson]

Hi,
When I am using a custom column and am scrolling in the treelistview the data seems to move around.
In the screenshot the data that is zero should not be zero. but there are columns that are zero. If I scroll around allot all columns will end up having the same number.

I am using version: 2013.1.311.40

here is my custom column code

public override FrameworkElement CreateCellElement(GridViewCell cell, object dataItem)
        {
            Grid cellGrid = cell.Content as Grid;

            TextBlock primaryText = new TextBlock(){ TextAlignment = System.Windows.TextAlignment.Right };
            TextBlock compareText = new TextBlock() { TextAlignment = System.Windows.TextAlignment.Right, Foreground = new SolidColorBrush(Color.FromRgb(100, 100, 100))};

            if (string.IsNullOrEmpty(this.DataMemberBinding.StringFormat))
            {
                this.ComparedPlanBinding.StringFormat = this.DataFormatString;
                this.DataMemberBinding.StringFormat   = this.DataFormatString;
            }

            primaryText.SetBinding(TextBlock.TextProperty, this.DataMemberBinding);
            compareText.SetBinding(TextBlock.TextProperty, ComparedPlanBinding);

            if (cellGrid == null)
            {
                cellGrid = new Grid();
                cellGrid.ColumnDefinitions.Add(new ColumnDefinition());
                cellGrid.ColumnDefinitions.Add(new ColumnDefinition() { Width = new GridLength(20)});
                cellGrid.ColumnDefinitions.Add(new ColumnDefinition());
                cellGrid.RowDefinitions.Add(new RowDefinition());

                cellGrid.Children.Add(primaryText);
                Grid.SetColumn(primaryText, 0);
                Grid.SetRow(primaryText, 0);

                cellGrid.Children.Add(compareText);
                Grid.SetColumn(compareText, 2);
                Grid.SetRow(compareText, 0);
            }
            return cellGrid;
        }

This only a problem when I scroll. Can you please advice.

Best regards
Kristján

[Dimitrina]

Hello,

Since the virtualization of RadGridView is turned on by default, it is not recommended to work with the visual elements and their properties. You can take a look at this article for a reference on UI Virtualization. 

In your code you work with the Cell.Content. Would it be possible for you to avoid using it and rely on the DataMemberBinding only?
 

Regards,
Didie
the Telerik team

[Kristjan Einarsson]

Hi,
When I disabled the visualization it works.

"In your code you work with the Cell.Content. Would it be possible for you to avoid using it and rely on the DataMemberBinding only?"
Not sure, but I need to have custom cells. Can I accomplish that without doing it the way I'm currently doing ?

[Dimitrina]

Hello,

You can check this help article on how to set a custom content for the cell. 

Kind regards,
Didie
the Telerik team