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我得到了一些從數據庫中檢索圖像的代碼,然後重新調整大小以便在特定頁面上顯示。 但是,在某些圖像上出現「內存不足」錯誤。內存不足 - Graphics.DrawImage
在我目前的情況下,我只在一個圖像上得到它,其餘的圖像工作正常。
請參閱下面的代碼。我錯過了什麼嗎?我不正確地釋放對象嗎?或者我的一些使用聲明應該改進? canvas.DrawImage行給出錯誤。 任何幫助定位我的代碼中的錯誤將不勝感激。
平臺版本是:任何CPU 我的操作系統:Win 7的64位
private byte[] SaveResizedImage(byte[] origImageBytes, int targetSize)
{
using (MemoryStream ms = new MemoryStream(origImageBytes))
using (Image origImage = Image.FromStream(ms))
{
Size newSize = CalculateDimensions(origImage.Size, targetSize);
using (Bitmap newImage = new Bitmap(newSize.Width, newSize.Height, PixelFormat.Format24bppRgb))
using (Graphics canvas = Graphics.FromImage(newImage))
{
canvas.SmoothingMode = SmoothingMode.AntiAlias;
canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
canvas.PixelOffsetMode = PixelOffsetMode.HighQuality;
canvas.DrawImage(origImage, new Rectangle(new Point(0, 0), newSize)); <--- This line give the exception error
ImageCodecInfo codecInfo = GetEncoderInfo(ImageFormat.Jpeg);
EncoderParameters encoderParams = new EncoderParameters(1);
encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, 75L);
using (MemoryStream newms = new MemoryStream())
{
newImage.Save(newms, codecInfo, encoderParams);
return newms.ToArray();
}
}
}
}
public static ImageCodecInfo GetEncoderInfo(ImageFormat format)
{
return ImageCodecInfo.GetImageEncoders().ToList().Find(delegate(ImageCodecInfo codec)
{
return codec.FormatID == format.Guid;
});
}
private static Size CalculateDimensions(Size oldSize, int targetSize)
{
Size newSize = new Size();
if (oldSize.Height > oldSize.Width)
{
newSize.Width = (int)(oldSize.Width * ((float)targetSize/(float)oldSize.Height));
newSize.Height = targetSize;
}
else
{
newSize.Width = targetSize;
newSize.Height = (int)(oldSize.Height * ((float)targetSize/(float)oldSize.Width));
}
return newSize;
}
感謝
GDI已知會在轉換過程中拋出錯誤的OOM。您的問題可能是損壞的BMP文件或不支持的格式。或... –
圖像有多大,即targetSize和origImage.Size的值是多少?你在32位或64位上運行?閱讀:http://blogs.msdn.com/b/ericlippert/archive/2009/06/08/out-of-memory-does-not-refer-to-physical-memory.aspx –
@KrisVandermotten那篇文章是不管怎樣與這個問題有關。這是gdi +問題。 –