Question

这是我调整图片大小的代码。它工作正常，但当我尝试删除以前创建的时，我有一个错误＆＃34;文件被另一个进程＆＃34;使用。这是代码：

try
{
    int newHeight = width * fromStream.Height / fromStream.Width;

    Image newImage = new Bitmap(width, newHeight);
    using (Graphics graphicsHandle = Graphics.FromImage(newImage))
    {
        graphicsHandle.InterpolationMode = InterpolationMode.HighQualityBicubic;
        graphicsHandle.DrawImage(fromStream, 0, 0, width, newHeight);
    }
    string processedFileName = String.Concat(Configuration.CoverLocalPath, @"\Processed\res_", Path.GetFileName(imageFile));
    newImage.Save(processedFileName, ImageFormat.Jpeg);
    newImage.Dispose();

    return processedFileName;
}
catch (Exception ex)
{
    Configuration.Log.Debug("Utility.cs", "ResizeMainCover", ex.Message);
    return string.Empty;
}

我试图处理Image对象但没有成功。任何提示？

Answer 1

如果没有更多的代码，很难说，但很可能罪魁祸首是你的fromStream没有被关闭和妥善处理。我假设“先前创建”表示您的源流。尝试将其包装在using语句中，注意我还包装了newImage，以便在出现异常时将其正确处理。

using(var fromStream = GetSourceImageStream()) 
{ 
    try 
    {
      int newHeight = width * fromStream.Height / fromStream.Width;

      using(Image newImage = new Bitmap(width, newHeight))
      {
        using (Graphics graphicsHandle = Graphics.FromImage(newImage))
        {
          graphicsHandle.InterpolationMode = InterpolationMode.HighQualityBicubic;
          graphicsHandle.DrawImage(fromStream, 0, 0, width, newHeight);
        }
        string processedFileName = String.Concat(Configuration.CoverLocalPath, @"\Processed\res_", Path.GetFileName(imageFile));
        newImage.Save(processedFileName, ImageFormat.Jpeg);
      }    
      return processedFileName; 
    } 
    catch (Exception ex) 
    {
       Configuration.Log.Debug("Utility.cs", "ResizeMainCover", ex.Message);
       return string.Empty; 
    }
    finally
    {
      fromStream.Close();
    } 
 }

调整大小的图像锁定文件

1 个答案: