Problem with Rezising in code behind

[Thomas]

Hello,

i use a print method in my program to print every usercontrol the user want to. this method transforms the usercontrols to the printer-size before the real printing starts.
it seems that the radchart has a problem with rezising. you can see the problem in the attachment.
Everything resizes correctly, exept the ChartArea (ChartArea starts at 2k instead of 0). I've tried to call UpdateLayout or Invalidate... on the Chart and/or ChartArea, but nothing seems to work.
Could anyone please help me?

Best Regards,
Thomas

[Rosko]

Hello Thomas,

You are on the right way of solving this. When you set the height and width, the layout system of WPF is not invoked to do the necessary things to update the layout of the UI control. So, you need to do that manually. You can see in the code snippet what it is need to be done basically in the click event. In case you are interested in how the layout system of WPF works, you see this online reading.

private void ExportClick(object sender, RoutedEventArgs e)
        {
            radChart.DefaultView.ChartArea.EnableAnimations = false;

            SaveFileDialog dialog = new SaveFileDialog();
            dialog.DefaultExt = "png";

            if (!(bool)dialog.ShowDialog())
                return;

            Stream fileStream = dialog.OpenFile();

            radChart.Height = double.Parse(textBox1.Text);
            radChart.Width = double.Parse(textBox2.Text);

            radChart.Measure(new Size(radChart.Width, radChart.Height));
            radChart.Arrange(new Rect(radChart.DesiredSize));

            radChart.UpdateLayout();

            radChart.ExportToImage(fileStream);
            fileStream.Close();
        }

Greetings,

Rosko

the Telerik team