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WriteableBitmap.WritePixels Method (Int32Rect, IntPtr, Int32, Int32, Int32, Int32)

Updates the pixels in the specified region of the bitmap.

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

public void WritePixels(
	Int32Rect sourceRect,
	IntPtr sourceBuffer,
	int sourceBufferSize,
	int sourceBufferStride,
	int destinationX,
	int destinationY
You cannot use methods in XAML.


Type: System.Windows.Int32Rect

The rectangle in sourceBuffer to copy.

Type: System.IntPtr

The input buffer used to update the bitmap.

Type: System.Int32

The size of the input buffer.

Type: System.Int32

The stride of the input buffer, in bytes.

Type: System.Int32

The destination x-coordinate of the left-most pixel in the back buffer.

Type: System.Int32

The destination y-coordinate of the top-most pixel in the back buffer.


One or more of the following conditions is true.

sourceRect falls outside the bounds of the WriteableBitmap.

destinationX or destinationY is outside the bounds of the WriteableBitmap.

sourceBufferSize < 1

sourceBufferStride < 1


sourceBuffer is null.

Call the WritePixels method to update the WriteableBitmap automatically with the contents of sourceBuffer. Calling this method is the equivalent of using the Lock and Unlock workflow described in the WriteableBitmap class remarks.


In partial trust, use the WritePixels(Int32Rect, Array, Int32, Int32, Int32) overload.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5 SP1, 3.0 SP2