Home / Community & Support / Developer Productivity Tools Forums / Silverlight > Chart > Exporting a Chart to Image with prefered size

• Patric Svensson

  Posted on May 7, 2012 (permalink)

  Hi,
  
  I am trying to export a RadChart to an image using myRadChart.ExportToImage(stream). This all works very well but I want to change the size of the output image.
  
  So I tried doing:
  
  myChart.Width = 800;
  myChart.Height = 600;
  myChart.ExportToImage(stream);
  
  However, the output image is still as big as the current browser view is.
  
  Is there a way around this?
  
  Thanks

  Reply

• Petar Marchev Petar Marchev

  Posted on May 10, 2012 (permalink)

  Hello Patric,
  
  This is more of a architecture's limitation. If you attempted the same with any other Silverlight control (such as Button) then you would get the same result. This is because even though you are changing the size - a layout pass has not been performed. This is the reason we do not support such a functionality out-of-the-box.
   
  However, I can suggest that you try this: wrap the export (and the dispose) in a Dispatcher Invoke. This will delay the export and may be a layout update pass will occur. I have tried this in a simple example and it works. Code below should help:
  

  myChart.Width = 800;

  myChart.Height = 600;

   

  Dispatcher.BeginInvoke(() =>

  {

    myChart.ExportToImage(stream);
   // stream.Close();

  });

  
  Another thing you can try is to force the LayoutUpdate:
  

  myChart.Width = 800;

  myChart.Height = 600;

   

  myChart.UpdateLayout();

  myChart.ExportToImage(stream);

  
  I would like to note again that this is a framework's limitation and this is really a hacky way to go around it, so make sure you test this thoroughly before you ship your product.
  
  All the best,
  Petar Marchev
  the Telerik team

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  Reply



• shankar parsanamoni

  Posted on Sep 12, 2012 (permalink)

  hello patric ,can you able to place the code here.

  Reply

• Petar Marchev Petar Marchev

  Posted on Sep 14, 2012 (permalink)

  Hello Shukreya,
  
  I have attached a simple project that demonstrates the two approaches.
  
  Kind regards,
  Petar Marchev
  the Telerik team

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  Attached files

  • sl-Chart-ticket-541545-ExportWithChangedSize.zip

  Reply

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