WCF大文件上传

WCF大文件上传
2018年07月08日 11:16:53 sky08050025 阅读数 700
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本文链接：https://blog.csdn.net/sky08050025/article/details/80957497
使用场景：

WINFORM客户端上传附件，附件通过调用WCF接口方法（POST方法，将对象转换为流，WCF接口收再转换回来），上传至服务器；

客户端(winform)调用：

        /// <summary>
        /// Wcf文件上传
        /// </summary>
        /// <param name="contentLength">文件长度（以字节为单位）。</param>
        /// <param name="inputStream">文件流</param>
        /// <param name="folder">上传的文件夹路径</param>
        /// <param name="fileName">文件名称</param>
        public static void WcfFileUp(int contentLength, Stream inputStream, string folder, string fileName, WJXX wjxx)
        {
            int UPLENGTH = 1048576;
            System.IO.Stream stream = inputStream;
            stream.Position = 0;//这边置为0是因为我们不做断点续传,如果要做断点续传的话这边就是上次传输中断时候的位置
            byte[] buffer;
            string wxurl = "http://...../Service.svc/UploadFile";//调用WCF服务
            var myWebClient = new WebClient();//模拟网页POST请求
            myWebClient.Credentials = CredentialCache.DefaultCredentials;
            try
            {
                bool b = false;
                do
                {
                    long i = (stream.Length - stream.Position);
                    if (i < 0)
                    {
                        i = stream.Length;
                    }
                    if (i > UPLENGTH)
                    {
                        //UPLENGTH是流模块的长度,分块时,每次上传模块的大小
                        buffer = new byte[UPLENGTH];
                        stream.Read(buffer, 0, UPLENGTH);
                    }
                    else
                    {
                        buffer = new byte[i];
                        stream.Read(buffer, 0, (int)i);
                    }
                    if (buffer.Length < 1)
                        break;
 
                    Hashtable parames = new Hashtable();
                    parames.Add("fileBytes", buffer);//文件块
                    parames.Add("position", stream.Position);//文件流开始位置
                    parames.Add("fileStreamLength", contentLength);//文件长度
                    parames.Add("folder", folder);//文件夹
                    parames.Add("fileName", fileName);//文件名46 
                    //自定义的参数
                    parames.Add("SJLYBM", wjxx.SJLYBM);//附件来源表名 
                    parames.Add("SJLYBXXBS", wjxx.SJLYBXXBS);//来源表数据主键
                    parames.Add("CJR", wjxx.CJR);//上传人
                    parames.Add("CJSJ", DateTime.Now.ToString());//上传时间 
 
 
 
                    byte[] tBytes = null;
                    using (MemoryStream memoryStream = new MemoryStream())
                    {
                        //将对象转为流模式
                        BinaryFormatter binaryFormatter = new BinaryFormatter();
                        binaryFormatter.Serialize(memoryStream, parames);
                        tBytes = memoryStream.ToArray();
                    }
                    //POST数据到Wcf中处理
                    byte[] responseArray = myWebClient.UploadData(wxurl, "POST", tBytes);
                    //返回处理的结果
                    string result = System.Text.Encoding.Default.GetString(responseArray, 0, responseArray.Length);
                    b = result == "true";
                }
                while (b == false);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                stream.Close();
            }
        }
WCF服务端：

IService:

 [OperationContract]
        [WebInvoke(UriTemplate = "UploadFile", Method = "POST", RequestFormat = WebMessageFormat.Json, 
            BodyStyle = WebMessageBodyStyle.Bare,ResponseFormat = WebMessageFormat.Json)]
        bool UploadFile(Stream stream);
Service.svc

  /// <summary>
        /// 上传文件
        /// </summary>
        public bool UploadFile(Stream stream)
        {
            return new ....().UploadFile(stream);
        }
方法定义：

        /// <summary>
        /// 文件上传(分块上传,支持断点续传)
        /// </summary>
        /// <param name="stream"></param>
        /// <returns></returns>
        [OperationContract]
        [WebInvoke(Method = "POST")]
        public bool UploadFile(Stream stream)
        {
            //WebInvoke Method要记得置为POST模式
            try
            {
                BinaryFormatter binaryFormatter = new BinaryFormatter();
                //将对象转化为Hashtable对象
                Hashtable parames = binaryFormatter.Deserialize(stream) as Hashtable;
                long position = (long)parames["position"];
                int fileStreamLength = (int)parames["fileStreamLength"];
                string folder = Convert.ToString(parames["folder"]);
                string fileName = Convert.ToString(parames["fileName"]);
                byte[] fileBytes = (byte[])parames["fileBytes"];
                bool result = false;
                string folderPath = System.AppDomain.CurrentDomain.BaseDirectory + @"service\" + folder;
 
 
                //创建保存文件夹
                if (!Directory.Exists(folderPath))
                {
                    Directory.CreateDirectory(folderPath);
                }
 
 
                string url_Post = folderPath + @"\" + fileName;
                //Path.Combine(folderPath, fileName)
                using (FileStream fs = new FileStream(url_Post, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                {
                    //写入到文件
                    fs.Position = fs.Length;
                    fs.Write(fileBytes, 0, fileBytes.Length);
                    if (fs.Length == fileStreamLength)
                    {
                        result = true;
                    }
                }
                if (result)
                {
                    string SJLYBM = Convert.ToString(parames["SJLYBM"]);
                    string SJLYBXXBS = Convert.ToString(parames["SJLYBXXBS"]);
                    string CJR = Convert.ToString(parames["CJR"]);
                    string CJSJ = Convert.ToString(parames["CJSJ"]);
                    string data = "{}";
                    result = new ...().Save_YJZH_WJ(data);//自定义业务方法
                }
                return result;
            }
            catch (Exception ex)
            {
                return false;
            }
        }
    }
WCF服务Config文件配制：

WCF的流模式只支持如下四种：1：BasicHttpBinding 2：NetTcpBinding 3：NetNamedPipeBinding 4：WebHttpBinding.
1.设置TransferMode。它支持四种模式（Buffered、Streamed、StreamedRequest、StreamedResponse），请根据具体情况设置成三种Stream模式之一。
2.修改MaxReceivedMessageSize。该值默认大小为64k，因此，当传输数据大于64k时，则抛出CommunicationException异常。  

3.修改receiveTimeout 和sendTimeout。大数据传送时间较长，需要修改这两个值，以免传输超时。

<system.serviceModel>
    <behaviors>
      <endpointBehaviors>
        <behavior name="webHttp">
          <webHttp/>
          <!--<enableWebScript />如果需要支持脚本调用请启用此项-->
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior name="YJ_Service_PostSerBeh">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <services>
      <service behaviorConfiguration="YJ_Service_PostSerBeh" name="YJ_Service.Service">
        <endpoint address=""
                  binding="webHttpBinding"
                  contract="YJ_Service.IService"
                  behaviorConfiguration="webHttp"
                  bindingConfiguration="webBinding"
                  name="post" />
        <endpoint address="mex" binding="mexHttpBinding" name="mex" contract="IMetadataExchange"/>
      </service>
    </services>
    <bindings>
      <webHttpBinding>
        <binding name="webBinding" maxBufferSize="2147483647" maxBufferPoolSize="2147483647"
          maxReceivedMessageSize="2147483647">
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"
            maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
        </binding>
      </webHttpBinding>
      <netTcpBinding>
        <binding name="MyTcpBinding"
                 maxBufferSize="2147483647"
                 maxReceivedMessageSize="2147483647"
                 sendTimeout="00:30:00" transferMode="Streamed">
        </binding>
      </netTcpBinding>
    </bindings>
  </system.serviceModel>
程序实现参照：

http://www.gkxsn.com/6353693949449511011.html