GridView items spacing code behind, in CreatePrintPreviewPages event handler

Question

Hello,

I am trying to remowe space between GridView items code behind.

I do it when I create print preview pages.

I cooked such code:

...
        GridView printPageGridView = new GridView();
        List<FrameworkElement> printPreviewPages = new List<FrameworkElement>();

...        
void CreatePrintPreviewPages(object sender, PaginateEventArgs e)
        {
            printPageGridView.Items.Clear();
            
            Style style = new Style();
            style.TargetType = typeof(GridViewItem);
            Setter marginSetter = new Setter();
            marginSetter.Property = GridViewItem.MarginProperty;
            marginSetter.Value = 0;
            style.Setters.Add(marginSetter);
            printPageGridView.ItemContainerStyle = style;
            printPageGridView.UpdateLayout();
            
            printPreviewPages.Clear();
            Rectangle r1 = new Rectangle();
            r1.Width = 400;
            r1.Height = 200;
            r1.StrokeThickness = 1;
            r1.Stroke = new SolidColorBrush(Colors.Red);
            Rectangle r2 = new Rectangle();
            r2.Width = 400;
            r2.Height = 200;
            r2.StrokeThickness = 1;
            r2.Stroke = new SolidColorBrush(Colors.Red);
            printPageGridView.Items.Add(r1);
            printPageGridView.Items.Add(r2);
            printPreviewPages.Add(printPageGridView);
            printDocument.SetPreviewPageCount(printPreviewPages.Count, PreviewPageCountType.Final);
        }

But it doesnt work. My page in print preview appears with spacing.

I test when print preview I generated first time, and when I changed page orientation and preview is generated next time.

Is it possible to remove space between GridView items in my case?

Answer 1

Hi @BitSmithy ,

Welcome to Microsoft Q&A!

According to the document FrameworkElement.Margin,

Property Value Thickness Provides margin values for the object. The default value is a default Thickness with all properties (dimensions) equal to 0.

You need to use Thickness to set the value of MarginProperty.

Setter marginSetter = new Setter();
marginSetter.Property = GridViewItem.MarginProperty;
marginSetter.Value = new Thickness(0);

Thank you.

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