Question

我尝试上传图片＆amp;视频文件，但使用此代码我的所有图像＆amp;视频文件已损坏，如何解码图像和文件？视频？

public void UploadFile(string SouPath, string DestPath, string Login, string Password)
{           
    try
    {
        FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(DestPath);
        request.Credentials = new NetworkCredential(Login, Password);

        request.Method = WebRequestMethods.Ftp.UploadFile;

        StreamReader sourceStream = new StreamReader(SouPath);
        byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd()); // **
        sourceStream.Close();
        request.ContentLength = fileContents.Length;

        Stream requestStream = request.GetRequestStream();
        requestStream.Write(fileContents, 0, fileContents.Length);
        requestStream.Close();

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();

        String FileName = Path.GetFileName(SouPath);
        WriteStoneList("Upload File " + FileName + ".  | Status : " + response.StatusDescription);
        response.Close();

    }
    catch (Exception ex)
    {
        WriteStoneList("`````````````````````````````````````");
        WriteStoneList(ex.ToString());
    }
}

我试图解码图像，但它无法正常工作。并且我在解码后也得到了损坏的图像。

    public static Stream Decode(string Path)
    {
        String text;
        using (StreamReader sr = new StreamReader(Path))
        {
            text = sr.ReadToEnd();
            char[] cc = text.ToArray<char>();
            //byte[] bytes = Convert.FromBase64String(text);
            //byte[] bytes = Convert.FromBase64CharArray(cc,0,cc.Length);
            byte[] bytes = System.IO.File.ReadAllBytes(Path);
            System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
            System.Text.Decoder decoder = encoder.GetDecoder();
            int count = decoder.GetCharCount(bytes, 0, bytes.Length);
            char[] arr = new char[count];
            decoder.GetChars(bytes, 0, bytes.Length, arr, 0);
            text = new string(arr);

            MemoryStream stream = new MemoryStream();
            StreamWriter writer = new StreamWriter(stream);
            writer.Write(text);
            writer.Flush();
            stream.Position = 0;
            return stream;
        }
    }

我使用了上面的解码功能来获取解码流

    public void ConvertFile(string fromPath,string toPath)
    {

        using (Stream source = Decode(fromPath))
        using (Stream dest = File.Create(toPath))
        {
            byte[] buffer = new byte[1024];
            int bytes;
            while ((bytes = source.Read(buffer, 0, buffer.Length)) > 0)
            {
                dest.Write(buffer, 0, bytes);

            }
        }
    }

Answer 1

StreamReader会读取文字信息流，当然您的图片会在目的地内损坏。

您过于复杂，WebClient已经有一个开箱即用的UploadFile方法：

using (WebClient client = new WebClient())
{
    client.Credentials = new NetworkCredential(Login, Password);
    client.UploadFile(DestPath, "STOR", SouPath);
}

Answer 2

图像和视频文件是二进制数据。将它们编码为utf-8将始终损坏此数据。没有必要对这些数据进行编码，只需将数据复制到流中，如下所示：

using(var fin = new FileStream(SouPath))
{
    request = fin.Length;
    Stream requestStream = request.GetRequestStream();
    fin.CopyTo(requestStream);
    requestStream.Close();
}

未经过测试

Encoding.UTF8.GetBytes（sourceStream.ReadToEnd（））破坏了我的图像和视频文件

2 个答案: