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Extensions.SaveJpeg Method

July 26, 2012

Encodes a WriteableBitmap object into a JPEG stream, with parameters for setting the target width and height of the JPEG file.

Namespace: System.Windows.Media.Imaging
Assembly: Microsoft.Phone (in Microsoft.Phone.dll)

Syntax

public static void SaveJpeg(
	this WriteableBitmap bitmap,
	Stream targetStream,
	int targetWidth,
	int targetHeight,
	int orientation,
	int quality
)

Parameters

bitmap: Type: System.Windows.Media.Imaging.WriteableBitmap
The WriteableBitmap object.

targetStream: Type: System.IO.Stream
The image data stream.

targetWidth: Type: System.Int32
The target width of the file.

targetHeight: Type: System.Int32
The target height of the file.

orientation: Type: System.Int32
This parameter is not currently used by this method. Use a value of 0 as a placeholder.

quality: Type: System.Int32
This parameter represents the quality of the JPEG photo with a range between 0 and 100, with 100 being the best photo quality. We recommend that you do not fall lower than a value of 70. because JPEG picture quality diminishes significantly below that level.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type WriteableBitmap. When you use instance method syntax to call this method, omit the first parameter.

Remarks

Note:
The position of targetStream cannot be used to determine the size of the encoded data. Further use of targetStream can have unpredictable results if the position of the stream is not explicitly set.

Version Information

Windows Phone OS

Supported in: 7.1, 7.0

Platforms

Windows Phone

Reference

Extensions Class

System.Windows.Media.Imaging Namespace

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