错误：底层连接已关闭：连接意外关闭。

Question

我试过其他帖子的建议，但没有奏效。当我尝试发送请求并获取GetResponse（）的响应时，出现此错误。

我的代码是这样，

protected string CreateSaleRequest(double amount, int installment) 
    { 
    string request = ""; 
    try 
    { 
     XmlNode node = null; 
     XmlDocument _msgTemplate = new XmlDocument(); 
     _msgTemplate.LoadXml("<?xml version=\"1.0\" encoding=\"UTF-8\" ?><ePaymentMsg VersionInfo=\"2.0\" TT=\"Request\" RM=\"Direct\" CT=\"Money\">" + 
     "<Operation ActionType=\"Sale\"><OpData><MerchantInfo MerchantId=\"\" MerchantPassword=\"\" />" + 
     "<ActionInfo><TrnxCommon TrnxID=\"\" Protocol=\"156\"><AmountInfo Amount=\"0\" Currency=\"792\" /></TrnxCommon><PaymentTypeInfo>" + 
     "<InstallmentInfo NumberOfInstallments=\"0\" /></PaymentTypeInfo></ActionInfo><PANInfo PAN=\"\" ExpiryDate=\"\" CVV2=\"\" BrandID=\"\" />" + 
     "<OrderInfo><OrderLine>0</OrderLine></OrderInfo><OrgTrnxInfo /><CustomData></CustomData><CardHolderIp></CardHolderIp></OpData></Operation></ePaymentMsg>"); 
     node = _msgTemplate.SelectSingleNode("//ePaymentMsg/Operation/OpData/MerchantInfo"); 
     node.Attributes["MerchantId"].Value = "006100200140200"; 
     node.Attributes["MerchantPassword"].Value = "123"; 
     node = _msgTemplate.SelectSingleNode("//ePaymentMsg/Operation/OpData/ActionInfo/TrnxCommon"); 
     node.Attributes["TrnxID"].Value = Guid.NewGuid().ToString(); 
     node = _msgTemplate.SelectSingleNode("//ePaymentMsg/Operation/OpData/ActionInfo/TrnxCommon/AmountInfo"); 
     string gonderilecekAmount = amount.ToString("####.00"); 
     gonderilecekAmount = gonderilecekAmount.Replace(",", "."); 
     node.Attributes["Amount"].Value = gonderilecekAmount; 
     node.Attributes["Currency"].Value = "949"; 
     node = _msgTemplate.SelectSingleNode("//ePaymentMsg/Operation/OpData/ActionInfo/PaymentTypeInfo/InstallmentInfo"); 
     node.Attributes["NumberOfInstallments"].Value = "0"; 
     node = _msgTemplate.SelectSingleNode("//ePaymentMsg/Operation/OpData/PANInfo"); 
     node.Attributes["PAN"].Value = "4022751585445574"; 
     node.Attributes["ExpiryDate"].Value = "201406"; 
     node.Attributes["CVV2"].Value = "408"; 
     node.Attributes["BrandID"].Value = "VISA"; 
     node = _msgTemplate.SelectSingleNode("//ePaymentMsg/Operation/OpData/CardHolderIp"); 
     node.InnerText = "10.20.30.40"; 
     request = _msgTemplate.OuterXml; 
     return request; 
    } 
    catch (Exception ex) 
    { 
     throw ex; 
    } 
    } 

public string Send(string request) 
    { 
     try 
     { 
      string postData = ""; 
      string responseData = ""; 
      System.Text.Encoding encoding = System.Text.Encoding.GetEncoding("ISO-8859-9"); 

      postData = "https://vpstest.bankasya.com.tr/iposnet/sposnet.aspx?prmstr=[DATA]"; 
      postData = postData.Replace("[DATA]", request); 
      HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(postData); 
      webReq.Timeout = Convert.ToInt32(20000); 
      webReq.KeepAlive = false; 
      webReq.ProtocolVersion = HttpVersion.Version10; 
      WebResponse webResp = webReq.GetResponse(); 
      Stream respStream = webResp.GetResponseStream(); 

      byte[] buffer = new byte[10000]; 
      int len = 0, r = 1; 
      while (r > 0) 
      { 
       r = respStream.Read(buffer, len, 10000 - len); 
       len += r; 
      } 
      respStream.Close(); 
      responseData = encoding.GetString(buffer, 0, len).Replace("\r", "").Replace("\n", ""); 
      return responseData; 
     } 
     catch (System.Net.Sockets.SocketException ex) 
     { 
      throw ex; 
     } 
     catch (WebException ex) 
     { 
      if (ex.Status == WebExceptionStatus.ServerProtocolViolation) 
      { 
       Response.Write("Status Code : {0} " + ((HttpWebResponse)ex.Response).StatusCode); 
       Response.Write("Status Description : {0} " + ((HttpWebResponse)ex.Response).StatusDescription); 
      } 
      throw ex; 
     } 
     catch (Exception ex) 
     { 
      throw ex; 
     } 
    } 

，我试过了，

<httpRuntime maxRequestLength="409600" executionTimeout="900"/> 

---

<system.net> 
    <settings> 
    <httpWebRequest useUnsafeHeaderParsing="true" /> 
    </settings> 
</system.net> 

---

webReq.KeepAlive = false; 
webReq.ProtocolVersion = HttpVersion.Version10; 
webReq.Timeout = 1000000000; 
webReq.ReadWriteTimeout = 1000000000; 

---

注意：代码中有测试信息。不是真正的价值。

Answer 1

银行的WCF系统出错。这段代码现在工作。