Question

我正在尝试使用特定形式的XML来回复我的web服务，我认为只需将数据放入字符串并将其返回到网页即可。

我想回来：

<tradeHistory><trade TradeId="1933" ExtId="1933" instrument="EUA" quantity="1500" setType="Escrow" TradeDate="12/02/2010" DeliveryDt="13/02/2010" PaymentDt="12/02/2010" type="BUY" pricePerUnit="6.81" GrossConsid="10320" currency="EUR"/></tradeHistory>

但是当我返回我正在收到的字符串时：

<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">&lt;tradeHistory&gt;&lt;trade tradeid="1933" ExtId="1933" Instrument="EUA" quantity"1500" setType="Escrow" TradeDate="24/05/2011" DeliveryDt="25/05/2011" PaymentDt="25/05/2011" type"BUY" pricePerUnit="6.81" GrossConsid="10320" currency="EUR" /&gt;&lt;tradeHistory&gt</string>

关于如何实现这一目标的任何想法？如果没有标签会很好，但我可以忍受这个，但我遇到的问题是它没有正确格式化字符串，它将开始和结束标签作为特殊字符读取

我的服务是：

<ServiceContract(Namespace:="")>
Public Interface ITradePortal

<WebGet(UriTemplate:="Reporting/GetClientTrades/{ClientID}")>
    <OperationContract()>
    Function GetClientTrades(ByVal ClientID As String) As String
End Interface

我的实施是：

<ServiceBehavior(ConcurrencyMode:=System.ServiceModel.ConcurrencyMode.Multiple, InstanceContextMode:=InstanceContextMode.Single, _
Namespace:="")>
<XmlSerializerFormat()>

和我的配置文件：

<services>
            <service behaviorConfiguration="Default" name="CFP_Web_Lib.TradePortal">
              <host>
                <baseAddresses>
                  <add baseAddress="http://localhost:8686/TradePortal"/>
                </baseAddresses>
              </host>
                <endpoint address="" binding="webHttpBinding"
                     contract="CFP_Web_Lib.ITradePortal"
                          behaviorConfiguration="web"
                     />
              <endpoint address="Operations/" binding="wsDualHttpBinding"
                   contract="CFP_Web_Lib.ITradeOperations"/>
                   </service>
        </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="Default">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="web">
          <webHttp/>
        </behavior>
        </endpointBehaviors>
    </behaviors>
    <bindings>
      <wsDualHttpBinding>
        <binding name="WSDualHttpBinding_IPubSubService" closeTimeout="00:01:00"
          openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
          bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
          maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text"
          textEncoding="utf-8" useDefaultWebProxy="true">
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
            maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <reliableSession ordered="true" inactivityTimeout="00:10:00" />
          <security mode="Message">
            <message clientCredentialType="Windows" negotiateServiceCredential="true"
              algorithmSuite="Default" />
          </security>
        </binding>
      </wsDualHttpBinding>
      <mexHttpBinding>
        <binding name="NewBinding0" />
      </mexHttpBinding>
    </bindings>

Answer 1

默认的返回格式是XML，因此当您的操作返回String时，它将被格式化为XML - 字符串内容在元素内。返回任何的最简单方法是使用raw programming model。您的操作看起来像这样：

<WebGet(UriTemplate:="Reporting/GetClientTrades/{ClientID}")> _
<OperationContract()> _
Function GetClientTrades(ByVal ClientID As String) As Stream

实施：

Function GetClientTraces(ByVal ClientID As String) As Stream Implements ITradePortal.GetClientTraces
    Dim result as String = "<tradeHistory>...</tradeHistory>"
    WebOperationContext.Current.OutgoingResponse.ContentType = "text/xml" ' or anything you need
    return new MemoryStream(Encoding.UTF8.GetBytes(result))
End Function

如果您不想处理Streams，另一个选项是将返回类型更改为XmlElement（或XElement）。这是“按原样”写出来的，因此您可以返回任意XML。

另一个选择是创建用于保存该数据的类。 TradeHistory类将包含对“Trade”实例的引用，而Trade类将具有使用该属性声明的许多字段。然后该操作的返回类型为TradeHistory。

从WCF服务返回原始XML

1 个答案: