单声道流问题

Question

我想使用NancyFX在服务器上上传文件。我这样做:

var fileStream = File.Create(path_to_file);
file.Value.Seek(0, SeekOrigin.Begin);
file.Value.CopyTo(fileStream);
fileStream.Close();

Also i tried:

byte[] buffer;
using (var memoryStream = new MemoryStream())
{
   file.Value.Seek(0, SeekOrigin.Begin);
   file.Value.CopyTo(memoryStream);
   buffer = memoryStream.ToArray();
}
MemoryStream ms = new MemoryStream(buffer, 0, buffer.Length);
ms.Position = 0;
Image img = Image.FromStream(ms, true);
img.Save(path);

:

File.WriteAllBytes(coverPath, buffer);

在我的Windows电脑上，它工作得很好。在Linux服务器上，镜像正在保存，但是镜像内容与原始镜像不匹配。这里是图片:原始图像，即上传:https://i.stack.imgur.com/mTsE2.jpg保存图片:https://i.stack.imgur.com/ORKn1.jpg如果图像大小为<900kb，图像保存良好，但有时也会出现线条。请帮助。

Answer 1

据我所知你有一个fileStream你想把它保存为Image

这是一个和平的代码，在Windows 8 .net 4.5和Ubuntu 12 TLS与mono JIT编译器版本2.10.8.1

class Program
{
    static void Main(string[] args)
    {
        string fileName = @"img/mTsE2.jpg";
        string destimationImage = @"img/dest.jpg";
        string appPath = AppDomain.CurrentDomain.BaseDirectory;
        string pathToFile = Path.Combine(appPath, fileName);
        if (!File.Exists(pathToFile))
        {
            Console.WriteLine("Cant find file {0}", pathToFile);
            Console.ReadLine();
            return;
        }
        MemoryStream memoryStream = new MemoryStream();


        using (FileStream fileStream = File.Open(pathToFile, FileMode.Open))
        {
            Console.WriteLine("Source length: {0}", fileStream.Length);
            byte[] bytes = new byte[fileStream.Length];
            fileStream.Read(bytes, 0, (int)fileStream.Length);
            memoryStream.Write(bytes, 0, (int)fileStream.Length);
        }
        Console.WriteLine("memoryStream length {0}", memoryStream.Length);
        string destPath = Path.Combine(appPath, destimationImage);
        CopyAsImage(destPath, memoryStream);
        Console.WriteLine("Done! Check file {0}",destPath);
        Console.ReadLine();
    }
    private static void CopyAsImage(string fileName, Stream stream)
    {
        if (File.Exists(fileName))
        {
            File.Delete(fileName);
        }
        Image image = Image.FromStream(stream, true, true);
        image.Save(fileName);

    }
}

如果

仍然不起作用，请注意大小。事实上，int是Int32类型对于最大2+Gigs的字节数组应该没问题