利用WebClient上传参数及文件流到远程ashx服务

1 思路：

WebClient.UploadFile()方法可以上传文件；UploadData()方法可以上传数据参数；如何合二为一既上传文件又上传参数呢？可将文件也当做参数，调用UploadData()方法

2  客户端

FileStream fs = new FileStream(“需上传文文件路径”, FileMode.Open, FileAccess.Read);

            byte[] byteFile = new byte[fs.Length];

            fs.Read(byteFile, 0, Convert.ToInt32(fs.Length));

            fs.Close();

            string postData = "param1=pwd&FileName=file1.xml&UploadFile=" + HttpUtility.UrlEncode(Convert.ToBase64String(byteFile));

            var webclient = new WebClient();

            webclient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");

            byte[] byteArray = Encoding.UTF8.GetBytes(postData);

            byte[] buffer = webclient.UploadData(“远程ashx URL”, "POST", byteArray);

            var msg = Encoding.UTF8.GetString(buffer);

3   服务端

string param1= context.Request["param1"].ToString();
  FileStream fs = new FileStream(“需要保存文件的路径”, FileMode.Create, FileAccess.Write);
        fs.Write(Convert.FromBase64String(context.Request["UploadFile"].ToString()), 0, Convert.FromBase64String(context.Request["UploadFile"].ToString()).Length);
        fs.Flush();
        fs.Close();