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Exporting a Chart to Image with prefered size

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Chart
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Patric Svensson
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Patric Svensson asked on 07 May 2012, 02:24 PM
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

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Petar Marchev
Telerik team
answered on 10 May 2012, 09:08 AM
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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shankar parshimoni
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answered on 12 Sep 2012, 11:19 AM
hello patric ,can you able to place the code here.
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Petar Marchev
Telerik team
answered on 14 Sep 2012, 08:39 AM
Hello Shukreya,

I have attached a simple project that demonstrates the two approaches.

Kind regards,
Petar Marchev
the Telerik team

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Patric Svensson
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Petar Marchev
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shankar parshimoni
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