using Export in RadCartesianChart

2 posts, 1 answers
  1. Shin
    Shin avatar
    1 posts
    Member since:
    Feb 2015

    Posted 09 Nov 2015 Link to this post

    first forgive poor my english written

     

    I Export to PNG before setting Zoom property is 5, 1 => 1, 1

    but Export image is still 5, 1 Zoom setting

     

     in XAML Code

    1.<!-- already Zoom property is 5,1 setting-->
    2.<telerik:RadCartesianChart Grid.Column="0" Grid.Row="1" x:Name="trfChart1" Palette="Windows8" Zoom="5,1">

     

    in cs Code

    1.// this.myChart.Zoom = new Size(5, 1) already setting Zoom property     
    2.string filename = "C:\\ExportedChart.png";
    3.using (System.IO.Stream fileStream = System.IO.File.Open(filename, System.IO.FileMode.OpenOrCreate))
    4.{
    5.   this.trfChart1.Zoom = new Size(1, 1); // When before Export Zoom Property set Zoom 1, 1
    6.   Telerik.Windows.Media.Imaging.ExportExtensions.ExportToImage(this.trfChart1, fileStream, new System.Windows.Media.Imaging.PngBitmapEncoder());
    7.
    8.// But Export result is still Zoom 5, 1 setting

     

     please give advise 

     

     

     

     

  2. Answer
    Martin
    Admin
    Martin avatar
    1101 posts

    Posted 10 Nov 2015 Link to this post

    Hello Shin,

    The chart is not exported with the new zoom level because it is not yet measure and arranged with the e Measure() and Arrange() methods of the chart right before the Exnew zoom. In order to achieve the desired effect you can manually call thportToImage() call.
    this.trfChart1.Zoom = new Size(1, 1);
     
    var size = trfChart1.RenderSize;
    this.trfChart1.Measure(Size.Empty);
    this.trfChart1.Measure(size);
    this.trfChart1.Arrange(new Rect(size));
    this.trfChart1.UpdateLayout();
     
    Telerik.Windows.Media.Imaging.ExportExtensions.ExportToImage(this.trfChart1, fileStream, new System.Windows.Media.Imaging.PngBitmapEncoder());

    I hope this helps.

    Regards,
    Martin
    Telerik
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