我正在裁剪圖像,並希望使用ashx處理程序返回它。作物代碼如下:將位圖動態返回給瀏覽器
public static System.Drawing.Image Crop(string img, int width, int height, int x, int y)
{
try
{
System.Drawing.Image image = System.Drawing.Image.FromFile(img);
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bppRgb);
bmp.SetResolution(image.HorizontalResolution, image.VerticalResolution);
Graphics gfx = Graphics.FromImage(bmp);
gfx.SmoothingMode = SmoothingMode.AntiAlias;
gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;
gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;
gfx.DrawImage(image, new Rectangle(0, 0, width, height), x, y, width, height, GraphicsUnit.Pixel);
// Dispose to free up resources
image.Dispose();
bmp.Dispose();
gfx.Dispose();
return bmp;
}
catch (Exception ex)
{
return null;
}
}
位圖被返回,而現在需要發送通過上下文流,其返回給瀏覽器,因爲我不希望創建一個物理文件。