private void SetSource(System.Windows.Controls.Image image, string fileName)

{

System.Drawing.Image sourceImage = System.Drawing.Image.FromFile(fileName);

int imageWidth = 0, imageHeight = 0;

InitializeImageSize(sourceImage, image, out imageWidth, out imageHeight);

Bitmap sourceBmp = new Bitmap(sourceImage, imageWidth, imageHeight);

IntPtr hBitmap = sourceBmp.GetHbitmap();

BitmapSource bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

bitmapSource.Freeze();

WriteableBitmap writeableBmp = new WriteableBitmap(bitmapSource);

sourceImage.Dispose();

sourceBmp.Dispose();

image.Source = writeableBmp;

}

/// <summary>

/// Initialize ImageSize.

/// </summary>

/// <param name="sourceImage"></param>

/// <param name="image"></param>

/// <param name="imageWidth"></param>

/// <param name="imageHeight"></param>

private static void InitializeImageSize(System.Drawing.Image sourceImage, System.Windows.Controls.Image image,

out int imageWidth, out int imageHeight)

{

int width = sourceImage.Width;

int height = sourceImage.Height;

float aspect = (float)width / (float)height;

if (image.Height != double.NaN)

{

imageHeight = Convert.ToInt32(image.Height);

imageWidth = Convert.ToInt32(aspect * imageHeight);

}

else if (image.Width != double.NaN)

{

imageWidth = Convert.ToInt32(image.Width);

imageHeight = Convert.ToInt32(image.Width / aspect);

}

else

{

imageHeight = 100;

imageWidth = Convert.ToInt32(aspect * imageHeight);

}

}

 

调用：  SetSource(this.imageCur, “C:\1.png”);

 

http://www.cnblogs.com/yunyou/archive/2013/01/25/2876054.html