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    <p>The following code example demonstrates how to create a EncoderParameter using the EncoderParameter constructor. To run this example, paste the code and call the <code>VaryQualityLevel</code> method. </p> <p>This example requires an image file named TestPhoto.jpg located at c:.</p> <pre><code>private void VaryQualityLevel() { // Get a bitmap. Bitmap bmp1 = new Bitmap(@"c:\TestPhoto.jpg"); ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg); // Create an Encoder object based on the GUID // for the Quality parameter category. System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality; // Create an EncoderParameters object. // An EncoderParameters object has an array of EncoderParameter // objects. In this case, there is only one // EncoderParameter object in the array. EncoderParameters myEncoderParameters = new EncoderParameters(1); EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 50L); myEncoderParameters.Param[0] = myEncoderParameter; bmp1.Save(@"c:\TestPhotoQualityFifty.jpg", jgpEncoder, myEncoderParameters); myEncoderParameter = new EncoderParameter(myEncoder, 100L); myEncoderParameters.Param[0] = myEncoderParameter; bmp1.Save(@"c:\TestPhotoQualityHundred.jpg", jgpEncoder, myEncoderParameters); // Save the bitmap as a JPG file with zero quality level compression. myEncoderParameter = new EncoderParameter(myEncoder, 0L); myEncoderParameters.Param[0] = myEncoderParameter; bmp1.Save(@"c:\TestPhotoQualityZero.jpg", jgpEncoder, myEncoderParameters); } private ImageCodecInfo GetEncoder(ImageFormat format) { ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders(); foreach (ImageCodecInfo codec in codecs) { if (codec.FormatID == format.Guid) { return codec; } } return null; } </code></pre> <p>Ref: <a href="http://msdn.microsoft.com/en-us/library/system.drawing.imaging.encoderparameter.aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/system.drawing.imaging.encoderparameter.aspx</a></p>
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    1. POQuality of a saved JPG in C#
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    1. USDustin Getz
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    1. COThat works. It would seems that without all this, a standard quality of 50L is used.
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      1. USKdgDev
    2. COYou have a typo. jgpEncoder when you meant jpgEncoder ;)
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      1. USMarco Luglio
 

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