Export RadChartView with SeriesProvider in Code

Environment

Product Version	2019.2.618
Product	RadChartView for WPF

Description

How to export RadChartView with a dynamic number of series (SeriesProvider) to a picture without adding it to the visual tree.

Solution

Set the Width and Height of the chart and then manually measure and arrange it. If the chart is hosted in a UserControl you will need to measure and arrange it as well.

Then use the ExportExtensions.ExportToImage method to export the chart.

private void ExportChartToImage() 
{ 
    var chartUserControl = new ChartUserControl(); // this UserControl is the view where the RadCartesianChart control is defined. 
    PrepareElementForExport(chartUserControl); 
 
    using (Stream fileStream = File.Open("../../myChartPicture.png", FileMode.OpenOrCreate)) 
    { 
        Telerik.Windows.Media.Imaging.ExportExtensions.ExportToImage(chartUserControl, fileStream, new PngBitmapEncoder()); 
    } 
 
} 
 
private static void PrepareElementForExport(ChartControl userControl) 
{ 
    var measureSize = new Size(500, 500); 
    userControl.Measure(measureSize); 
    userControl.Arrange(new Rect(measureSize)); 
    userControl.UpdateLayout(); 
 
    var chart = userControl.ChildrenOfType<RadCartesianChart>().FirstOrDefault(); 
    if (chart != null) 
    { 
        chart.Width = chart.RenderSize.Width; 
        chart.Height = chart.RenderSize.Height; 
        chart.OnApplyTemplate(); 
        chart.UpdateLayout(); 
    } 
}