从WCF服务返回原始XML

Question

我想让我的web服务用特定形式的XML进行回复，我认为只需将数据放入字符串并将其返回到网页即可。

我试图返回：

<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，当我返回字符串我越来越：

<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> 

我如何能实现这一目标的任何想法？这将是很好不会有标签，但我可以忍受，但我有问题是它不是格式化字符串正确的阅读开始和结束标记为特殊字符

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 

我的实现是：

<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

默认返回格式是XML，所以当您的操作返回String时，它将被格式化为XML - 字符串内容在元素中。最简单的方法返回什么将使用raw programming model。你的行动将是这个样子：

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

和实现：

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 

另一种选择，如果你不想来处理数据流，是返回类型更改为XmlElement的（或的XElement）。这是写“按原样”，所以你可以返回任意的XML。

另一种选择是创建类来保存该数据。 TradeHistory类将持有对“Trade”实例的引用，Trade类将具有许多使用该属性声明的字段。该操作然后将具有返回类型TradeHistory。