c# 后台模拟表单post 附带参数上传文件

[?^man^]

DirectoryInfo TheFolder = new DirectoryInfo(filePath);
            string fileNamePath = "";
            string fileNameExt = "";
            string sGuid = "";
            string saveName = "";
            foreach (FileInfo NextFile in TheFolder.GetFiles())
            {
                fileNamePath = "";
                fileNameExt = "";
                sGuid = "";
                saveName = "";

                fileNamePath = filePath + "\\" + NextFile.Name;
                fileNameExt = fileNamePath.Substring(+fileNamePath.LastIndexOf(".") + 1);
                sGuid = System.Guid.NewGuid().ToString() + "." + fileNameExt;
                //saveName = sGuid;
                //saveName = NextFile.Name.Substring(0, NextFile.Name.LastIndexOf(".")) + "_" + DateTime.Now.ToString("yyyyMMddHHmmss") + "." + fileNameExt;
                saveName = NextFile.Name.Substring(0, NextFile.Name.LastIndexOf(".")) + "." + fileNameExt;
                FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
                BinaryReader r = new BinaryReader(fs);     //时间戳 
                string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");
                byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "--\r\n");     //请求头部信息 
                StringBuilder sb = new StringBuilder();
                sb.Append("--");
                sb.Append(strBoundary);
                sb.Append("\r\n");
                sb.Append("Content-Disposition: form-data; name=\"");
                sb.Append("Filedata");
                sb.Append("\"; filename=\"");
                sb.Append(saveName);
                sb.Append("\";");
                sb.Append("\r\n");
                sb.Append("Content-Type: ");
                sb.Append("application/octet-stream");
                sb.Append("\r\n");
                sb.Append("\r\n");
                
                sb.Append("Content-Disposition: form-data; userkey=\"");
                sb.Append(key);
                sb.Append("\r\n");
                sb.Append("\r\n");

                //sb.Append("--");
                //sb.Append(strBoundary);
                //sb.Append("\r\n");
                //sb.Append("Content-Disposition: form-data; name=\"");
                //sb.Append(key);
                //sb.Append("\r\n");
                //sb.Append("\r\n");
                string strPostHeader = sb.ToString();
                byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);     // 根据uri创建HttpWebRequest对象 
                HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));
                httpReq.Method = "POST";     //对发送的数据不使用缓存 
                //httpReq.AllowWriteStreamBuffering = false;     //设置获得响应的超时时间（300秒） 
                httpReq.Timeout = 30000000;
                httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;
                long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;
                long fileLength = fs.Length;
                httpReq.ContentLength = length;
                try
                {
                    progressBar.Maximum = int.MaxValue;
                    progressBar.Minimum = 0;
                    progressBar.Value = 0;
                    int bufferLength = 4096;
                    byte[] buffer = new byte[bufferLength];
                    //已上传的字节数
                    long offset = 0;
                    //开始上传时间
                    DateTime startTime = DateTime.Now;
                    int size = r.Read(buffer, 0, bufferLength);
                    Stream postStream = httpReq.GetRequestStream();
                    //发送请求头部消息
                    postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
                    while (size > 0)
                    {
                        postStream.Write(buffer, 0, size);
                        offset += size;
                        progressBar.Value = (int)(offset * (int.MaxValue / length));
                        TimeSpan span = DateTime.Now - startTime;
                        double second = span.TotalSeconds;
                        label2.Text = "已上传：" + (offset * 100.0 / length).ToString("F2") + "%";
                        Application.DoEvents();
                        size = r.Read(buffer, 0, bufferLength);
                        if (size==0)
                        {
                            label2.Text = "已上传：100%";
                            progressBar.Value = int.MaxValue;
                        }
                    }
                    //添加尾部的时间戳 
                    postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
                    postStream.Close();         //获取服务器端的响应 
                    WebResponse webRespon = httpReq.GetResponse();
                    Stream s = webRespon.GetResponseStream();
                    //读取服务器端返回的消息
                    StreamReader sr = new StreamReader(s);
                    String sReturnString = sr.ReadLine();
                    s.Close();
                    sr.Close();
                    JObject jo1 = (JObject)JsonConvert.DeserializeObject(sReturnString);
                    string resultcode = jo1["resultcode"].ToString();
                    string description = jo1["description"].ToString();
                    if (resultcode == "200" && description == "成功！")
                    {
                        returnValue = 1;
                        progressBar.Value = int.MaxValue;
                    }
                    else 
                    {
                        returnValue = 0;
                    }
                }
                catch (Exception e)
                {
                    label2.Text = "上传失败";
                    throw e;
                    
                    //returnValue = 0;
                }
                finally
                {
                    fs.Close();
                    r.Close();
                }

sb.Append("Content-Disposition: form-data; userkey=\"");
sb.Append(key);
sb.Append("\r\n");
sb.Append("\r\n");
这一段是我新添加的，标识新增一个参数，但是无法上传，提示500，应该是参数问题

[陈悕]

sb.Append("Content-Disposition: form-data; userkey=\"");
sb.Append(key);
sb.Append("\r\n");
sb.Append("\r\n");

userkey没有写结束的双引号？加上试试？

[?^man^]

引用 1 楼 cx067261 的回复:

sb.Append("Content-Disposition: form-data; userkey=\"");
sb.Append(key);
sb.Append("\r\n");
sb.Append("\r\n");

userkey没有写结束的双引号？加上试试？

引用 1 楼 cx067261 的回复:

sb.Append("Content-Disposition: form-data; userkey=\"");
sb.Append(key);
sb.Append("\r\n");
sb.Append("\r\n");

userkey没有写结束的双引号？加上试试？

sb.Append("Content-Disposition: form-data; userkey=\""); sb.Append(key); sb.Append("\";"); sb.Append("\r\n"); sb.Append("\r\n"); 是不是这样？？？、

[?^man^]

引用 1 楼 cx067261 的回复:

sb.Append("Content-Disposition: form-data; userkey=\"");
sb.Append(key);
sb.Append("\r\n");
sb.Append("\r\n");

userkey没有写结束的双引号？加上试试？

结束的双引号？？？我没明白

[?^man^]

引用 1 楼 cx067261 的回复:

sb.Append("Content-Disposition: form-data; userkey=\"");
sb.Append(key);
sb.Append("\r\n");
sb.Append("\r\n");

userkey没有写结束的双引号？加上试试？

解决了，是少半个引号，但是我改了写法

FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
                BinaryReader r = new BinaryReader(fs);     //时间戳 
                string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");
                byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "--\r\n");     //请求头部信息 
                StringBuilder sb = new StringBuilder();
                sb.Append("--");
                sb.Append(strBoundary);
                sb.Append("\r\n");

                sb.Append("Content-Disposition: form-data; name=\"");
                sb.Append("userkey\"");
                sb.Append("\r\n");
                sb.Append("\r\n");
                sb.Append(key);
                sb.Append("\r\n");


                sb.Append("--");
                sb.Append(strBoundary);
                sb.Append("\r\n");
                sb.Append("Content-Disposition: form-data; name=\"");
                sb.Append("Filedata");
                sb.Append("\"; filename=\"");
                sb.Append(saveName);
                sb.Append("\";");
                sb.Append("\r\n");
                sb.Append("Content-Type: ");
                sb.Append("application/octet-stream");
                sb.Append("\r\n");
                sb.Append("\r\n");