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我需要从文件夹中读取所有图像文件并将其保存到另一个具有压缩大小的文件夹中。但是我的代码很好地压缩了这些图像，但是在 695 个图像文件“内存不足异常”之后会出错。这是我的代码。大约有 2000 张图片

List<string> files = new List<string>();
files = Directory.GetFiles(Server.MapPath("../imgres") + "\\products\\", "*.jpg").ToList();
for (int k = 0; k < files.Count; k++)
{
  if (File.Exists(files[k].ToString()))
  {
    string SaveLocation1 = "";
    System.Drawing.Image thumbnail;
    System.Drawing.Image smallsize;
    System.Drawing.Image originalimg;

    originalimg = System.Drawing.Image.FromFile(files[k].ToString());
    thumbnail = originalimg.GetThumbnailImage(110, 110, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);
    smallsize = originalimg.GetThumbnailImage(47, 47, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);

    SaveLocation1 = Server.MapPath("../imgres/products") + "\\Thumbnail\\" + Path.GetFileName(files[k].ToString());
    thumbnail.Save(SaveLocation1);
    thumbnail.Dispose();

    SaveLocation1 = Server.MapPath("../imgres/products") + "\\smallsize\\" + Path.GetFileName(files[k].ToString());
    smallsize.Save(SaveLocation1);
    smallsize.Dispose();

  }
}
4

2 回答 2

4

问题是您没有originalimg像处理其他图像参考那样处理。您应该在 if 语句的末尾添加以下内容：

originalimg.Dispose();

但是，我建议您使用using块，这些将帮助您更好地管理此类资源的处置，因为您不必隐式调用该Dispose方法，并且即使在调用之前发生异常，它也会处理处置Dispose，所以您可以肯定它会被正确清理。

像这样的东西：

if (File.Exists(files[k].ToString()))
{
    using(System.Drawing.Image originalimg = System.Drawing.Image.FromFile(files[k].ToString()))
    {
        using(System.Drawing.Image thumbnail = originalimg.GetThumbnailImage(110, 110, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero))
        {
            using(System.Drawing.Image smallsize = originalimg.GetThumbnailImage(47, 47, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero))
            {
                string SaveLocation1 = Server.MapPath("../imgres/products") + "\\Thumbnail\\" + Path.GetFileName(files[k].ToString());
                thumbnail.Save(SaveLocation1);

                SaveLocation1 = Server.MapPath("../imgres/products") + "\\smallsize\\" + Path.GetFileName(files[k].ToString());
                smallsize.Save(SaveLocation1);
            }
        }
    }
}
于 2013-09-30T09:58:01.467 回答
4

我建议使用 using 块对其进行修改，以避免任何需要调用（或忘记调用）该Dispose方法：

using (Image originalimg = Image.FromFile(files[k].ToString()))
{
   using (Image thumbnail = originalimg.GetThumbnailImage(110, 110, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero))
   {
      thumbnail.Save(...);
   }

   using (Image smallsize = originalimg.GetThumbnailImage(47, 47, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero))
   {
      smallsize.Save(...);
   }
}
于 2013-09-30T10:00:24.210 回答