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How to capture a image in WPF application

Posted on 2013-06-25
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Last Modified: 2013-07-20
Hi,
I have WPF application created using .Net 4.0 and VS 2010.
I want to capture the image from the WPF  application.

Please help me in moving the right direction.

Thanks.
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Question by:KavyaVS
  • 3
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6 Comments
 
LVL 42

Assisted Solution

by:sedgwick
sedgwick earned 50 total points
ID: 39277817
what do u mean capture the image?
screenshot of the application?
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LVL 13

Assisted Solution

by:jonnidip
jonnidip earned 450 total points
ID: 39277900
If the meaning of your question is "capturing a screenshot of the application" (as previous comment), then you may use this function:
private static void CaptureScreen()
{
    String FileName = @"c:\temp\screenshot.jpg";
    using (Bitmap screenBmp = new Bitmap((Int32)SystemParameters.PrimaryScreenWidth,
                                            (Int32)SystemParameters.PrimaryScreenHeight,
                                            System.Drawing.Imaging.PixelFormat.Format32bppArgb))
    {
        using (Graphics bmpGraphics = Graphics.FromImage(screenBmp))
        {
            bmpGraphics.CopyFromScreen(0, 0, 0, 0, screenBmp.Size);
            BitmapSource bmpSource = Imaging.CreateBitmapSourceFromHBitmap(
                                                screenBmp.GetHbitmap(),
                                                IntPtr.Zero,
                                                Int32Rect.Empty,
                                                BitmapSizeOptions.FromEmptyOptions());
            BitmapEncoder bmpEncoder = new JpegBitmapEncoder() { QualityLevel = 20 };
            bmpEncoder.Frames.Add(BitmapFrame.Create(bmpSource));
            using (FileStream fs = new FileStream(FileName, FileMode.Create))
                bmpEncoder.Save(fs);
        }
    }
}

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Regards.
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Author Comment

by:KavyaVS
ID: 39278475
It is not capturing the screen shot of the application.It is capturing the image from web cam
or camera.

Thanks.
0
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LVL 13

Accepted Solution

by:
jonnidip earned 450 total points
ID: 39278753
In that case, you will need to enumerate your devices using WIA or WPD (for Vista and later).
In the past I used to develop code for both Twain and WIA, but I preferred to buy a 3rd party component (sorry, can't remember the name).
You may check here for a modern solution.

I hope this can help.

Regards.
0
 

Author Comment

by:KavyaVS
ID: 39278913
I tried the example in codeplex. But I am not sure what else I need to added and how it will work. Please check this http://easywebcam.codeplex.com/

It is compiling but not working.Please let me know what else I need to add for the above example I used. I am testing it in Windows 7.


Thanks
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Author Closing Comment

by:KavyaVS
ID: 39342055
Thanks
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