如何解析http header multipart / form Data

Question

我创建了一个WCF Rest服务，我正在阅读multipart / form数据发送的内容。但是，我从流中获取内容配置和额外信息。  导致文件损坏，特别是图像。我的服务托管在IIS上。以下是用于实现的代码。当我上传文件时，文件会添加额外的内容。如何删除额外内容？

public string UploadFile(Stream fileContent)
    {           
        try
        {
            FileStream targetStream = null;
            string uploadFolder = @"C:\Upload";
            string filePath = Path.Combine(uploadFolder, "123");             

            using (targetStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))
            {                   
                const int bufferLen = 45000;
                byte[] buffer = new byte[bufferLen];
                int count = 0;
                while ((count = fileContent.Read(buffer, 0, bufferLen)) > 0)
                {
                    // save to output stream
                    targetStream.Write(buffer, 0, count);
                }

                targetStream.Close();
                targetStream.Dispose();
            }
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
        return "Image Uploaded";
    }