相关疑难解决方法(0)

我正在编写捕获此代码的代码OutOfMemoryException并抛出一个新的,更直观的异常:

/// ...
/// <exception cref="FormatException">The file does not have a valid image format.</exception>
public static Image OpenImage( string filename )
{
    try
    {
        return Image.FromFile( filename );
    }
    catch( OutOfMemoryException ex )
    {
        throw new FormatException( "The file does not have a valid image format.", ex );
    }
}

此代码是否为其用户所接受,或者是OutOfMemoryException出于特殊原因故意被抛出？

我需要调整 5000 张图像的大小并将它们保存在一个单独的文件夹中。我有一个这样的代码来创建一张图片的调整大小的副本（在互联网上找到）：

Bitmap ResizeImage(System.Drawing.Image image, int width, int height)
       
 {
            var destRect = new System.Drawing.Rectangle(0, 0, width, height);
            var destImage = new Bitmap(width, height);

            destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);

            using (var graphics = Graphics.FromImage(destImage))
            {
                graphics.CompositingMode = CompositingMode.SourceCopy;
                graphics.CompositingQuality = CompositingQuality.HighQuality;
                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                graphics.SmoothingMode = SmoothingMode.HighQuality;
                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;

                using (var wrapMode = new ImageAttributes())
                {
                    wrapMode.SetWrapMode(WrapMode.TileFlipXY);
                    graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
                }
            }
            
            return destImage;
        }

我有这个代码，它首先创建所有必要的目录来保存图片，然后开始更改所有图像并将它们保存到新文件夹中。在执行程序的过程中，我的内存开始填满，直到达到~590mb（~1800张图像）的标记，然后抛出OutOfMemoryException错误。

void ResizeAllImages()
        {
            var files = Directory.GetFiles(ImagesDirectory, "*", SearchOption.AllDirectories);

            if …