WF4 WCF关联和MessageContract不起作用
我有一个WF4 WCF服务，我试图通过soap消息使基于内容的关联工作。
我收到以下错误消息：
<Message>A correlation query yielded an empty result set. Please ensure correlation queries for the endpoint are correctly configured.</Message>
<StackTrace><![CDATA[at System.ServiceModel.Activities.Dispatcher.CorrelationKeyCalculator.Calculator`1.CalculateKeys(T target, Message messageToReadHeaders, InstanceKey& instanceKey, ICollection`1& additionalKeys)
at System.ServiceModel.Activities.Dispatcher.ControlOperationInvoker.GetInstanceKeys(OperationContext operationContext, InstanceKey& instanceKey, ICollection`1& additionalKeys)
at System.ServiceModel.Activities.Dispatcher.ControlOperationInvoker.ControlOperationAsyncResult.EnsureInstanceId()
at System.ServiceModel.Activities.Dispatcher.ControlOperationInvoker.ControlOperationAsyncResult.Process()
at System.ServiceModel.Activities.Dispatcher.ControlOperationInvoker.ControlOperationAsyncResult..ctor(ControlOperationInvoker invoker, Object[] inputs, IInvokeReceivedNotification notification, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Activities.Dispatcher.ControlOperationInvoker.InvokeBegin(Object instance, Object[] inputs, IInvokeReceivedNotification notification, AsyncCallback callback, Object state)
at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)]]></StackTrace>
这是我的班
[MessageContract(IsWrapped = false)]
public class ClaimObj
{
[MessageHeader]
public string CorrelationId { get; set; }
[MessageBodyMember]
public string InstanceId { get; set; }
}
这里是我的xaml，因专有原因而更改了命名空间
<Activity mc:Ignorable="sap" x:Class="Project.WorkFlow.Activities.Activity4" sap:VirtualizedContainerService.HintSize="654,676" mva:VisualBasic.Settings="Assembly references and imported namespaces for internal implementation" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:av="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mv="clr-namespace:Microsoft.VisualBasic;assembly=System" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:p="http://ns.ns2.com/" xmlns:p1="http://schemas.microsoft.com/netfx/2009/xaml/servicemodel" xmlns:qm="clr-namespace:Project.MessageWrappers;assembly=Project.MessageWrappers" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:s1="clr-namespace:System;assembly=System" xmlns:s2="clr-namespace:System;assembly=System.Xml" xmlns:s3="clr-namespace:System;assembly=System.Core" xmlns:sa="clr-namespace:System.Activities;assembly=System.Activities" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:sap="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System" xmlns:scg1="clr-namespace:System.Collections.Generic;assembly=System.ServiceModel" xmlns:scg2="clr-namespace:System.Collections.Generic;assembly=System.Core" xmlns:scg3="clr-namespace:System.Collections.Generic;assembly=mscorlib" xmlns:sd="clr-namespace:System.Data;assembly=System.Data" xmlns:sl="clr-namespace:System.Linq;assembly=System.Core" xmlns:ssa="clr-namespace:System.ServiceModel.Activities;assembly=System.ServiceModel.Activities" xmlns:ssx="clr-namespace:System.ServiceModel.XamlIntegration;assembly=System.ServiceModel" xmlns:st="clr-namespace:System.Text;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Flowchart sad:XamlDebuggerXmlReader.FileName="D:Activity4.xaml" sap:VirtualizedContainerService.HintSize="614,636">
<Flowchart.Variables>
<Variable x:TypeArguments="qm:ClaimObj" Name="RequestObj" />
<Variable x:TypeArguments="p1:CorrelationHandle" Name="handle" />
</Flowchart.Variables>
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<x:Boolean x:Key="IsExpanded">False</x:Boolean>
<av:Point x:Key="ShapeLocation">270,2.5</av:Point>
<av:Size x:Key="ShapeSize">60,75</av:Size>
<av:PointCollection x:Key="ConnectorLocation">300,77.5 300,107.5 290,107.5 290,115</av:PointCollection>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<Flowchart.StartNode>
<FlowStep x:Name="__ReferenceID1">
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">162.5,115</av:Point>
<av:Size x:Key="ShapeSize">255,90</av:Size>
<av:PointCollection x:Key="ConnectorLocation">290,205 290,235</av:PointCollection>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<p1:Receive x:Name="__ReferenceID0" CanCreateInstance="True" CorrelatesWith="[handle]" sap:VirtualizedContainerService.HintSize="255,90" OperationName="Process" ServiceContractName="p:IActivity4Service">
<p1:Receive.CorrelatesOn>
<p1:XPathMessageQuery x:Key="key1">
<p1:XPathMessageQuery.Namespaces>
<ssx:XPathMessageContextMarkup>
<x:String x:Key="xg0">http://schemas.datacontract.org/2004/07/Project.MessageWrappers</x:String>
</ssx:XPathMessageContextMarkup>
</p1:XPathMessageQuery.Namespaces>sm:header()/tempuri:CorrelationId</p1:XPathMessageQuery>
</p1:Receive.CorrelatesOn>
<p1:ReceiveMessageContent DeclaredMessageType="qm:ClaimObj">
<OutArgument x:TypeArguments="qm:ClaimObj">[RequestObj]</OutArgument>
</p1:ReceiveMessageContent>
</p1:Receive>
<FlowStep.Next>
<FlowStep x:Name="__ReferenceID2">
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">162.5,235</av:Point>
<av:Size x:Key="ShapeSize">255,90</av:Size>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<p1:SendReply Request="{x:Reference __ReferenceID0}" DisplayName="SendReplyToReceive" sap:VirtualizedContainerService.HintSize="255,90">
<p1:SendMessageContent DeclaredMessageType="qm:ClaimObj">
<InArgument x:TypeArguments="qm:ClaimObj">[RequestObj]</InArgument>
</p1:SendMessageContent>
</p1:SendReply>
</FlowStep>
</FlowStep.Next>
</FlowStep>
</Flowchart.StartNode>
<x:Reference>__ReferenceID1</x:Reference>
<x:Reference>__ReferenceID2</x:Reference>
我知道这个问题与我的xpath有关。 我已经尝试了许多不同的想法，唯一可行的是11445（http://msdn.microsoft.com/en-us/library/ee358742.aspx），但是这并没有给我跟踪关联。 这些不起作用
sm:body()/xg0:ClaimObj/xg0:CorrelationId
sm:header()/tempuri:CorrelationId
sm:header()/xg0:ClaimObj/xg0:CorrelationId
sm:header()/tempuri:ClaimObj/tempuri:CorrelationId
我可以让它与DataContracts一起工作，但我需要使用MessageContracts
更新：这是我真正需要做的事情：
接收请求
向服务器X发送单向wcf调用
（第二次接收）服务器X在具有相关ID的新wcf调用中发送回工作流，而不是回复
做一些其他的东西
发送回复原来的接收
这是我尝试工作的基本工作流程。 问题是第二次接收没有被找到，因为xpath没有被调用。
在附注中，当我尝试在第一次接收时使用correlationinitializer时，我遇到了同样的问题
<Activity mc:Ignorable="sap" x:Class="Project.WorkFlow.Activities.Activity4" sap:VirtualizedContainerService.HintSize="828,872" mva:VisualBasic.Settings="Assembly references and imported namespaces for internal implementation" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:av="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mv="clr-namespace:Microsoft.VisualBasic;assembly=System" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:p="http://ns.domain.com/" xmlns:p1="http://schemas.microsoft.com/netfx/2009/xaml/servicemodel" xmlns:qm="clr-namespace:Project.MessageWrappers;assembly=Project.MessageWrappers" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:s1="clr-namespace:System;assembly=System" xmlns:s2="clr-namespace:System;assembly=System.Xml" xmlns:s3="clr-namespace:System;assembly=System.Core" xmlns:sa="clr-namespace:System.Activities;assembly=System.Activities" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:sap="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System" xmlns:scg1="clr-namespace:System.Collections.Generic;assembly=System.ServiceModel" xmlns:scg2="clr-namespace:System.Collections.Generic;assembly=System.Core" xmlns:scg3="clr-namespace:System.Collections.Generic;assembly=mscorlib" xmlns:sd="clr-namespace:System.Data;assembly=System.Data" xmlns:sl="clr-namespace:System.Linq;assembly=System.Core" xmlns:ssa="clr-namespace:System.ServiceModel.Activities;assembly=System.ServiceModel.Activities" xmlns:ssx="clr-namespace:System.ServiceModel.XamlIntegration;assembly=System.ServiceModel" xmlns:st="clr-namespace:System.Text;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Flowchart sad:XamlDebuggerXmlReader.FileName="D:Activity4.xaml" sap:VirtualizedContainerService.HintSize="788,832">
<Flowchart.Variables>
<Variable x:TypeArguments="qm:ClaimObj" Name="RequestObj" />
<Variable x:TypeArguments="p1:CorrelationHandle" Name="handle" />
<Variable x:TypeArguments="qm:GetClaimObj" Name="GetClaimIn" />
</Flowchart.Variables>
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<x:Boolean x:Key="IsExpanded">False</x:Boolean>
<av:Point x:Key="ShapeLocation">270,2.5</av:Point>
<av:Size x:Key="ShapeSize">60,75</av:Size>
<av:PointCollection x:Key="ConnectorLocation">300,77.5 300,107.5 290,107.5 290,115</av:PointCollection>
<x:Double x:Key="Width">773.5</x:Double>
<x:Double x:Key="Height">796.04</x:Double>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<Flowchart.StartNode>
<FlowStep x:Name="__ReferenceID1">
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">162.5,115</av:Point>
<av:Size x:Key="ShapeSize">255,90</av:Size>
<av:PointCollection x:Key="ConnectorLocation">290,205 290,209 241,209 241,239</av:PointCollection>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<p1:Receive x:Name="__ReferenceID0" CanCreateInstance="True" CorrelatesWith="[handle]" sap:VirtualizedContainerService.HintSize="255,90" OperationName="Process" ServiceContractName="p:IActivity4Service">
<p1:Receive.KnownTypes>
<x:Type Type="qm:ClaimObj" />
</p1:Receive.KnownTypes>
<p1:ReceiveMessageContent DeclaredMessageType="qm:ClaimObj">
<OutArgument x:TypeArguments="qm:ClaimObj">[RequestObj]</OutArgument>
</p1:ReceiveMessageContent>
</p1:Receive>
<FlowStep.Next>
<FlowStep x:Name="__ReferenceID2">
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">120,239</av:Point>
<av:Size x:Key="ShapeSize">242,93</av:Size>
<av:PointCollection x:Key="ConnectorLocation">241,332 240,332 240,355</av:PointCollection>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<p1:InitializeCorrelation Correlation="[handle]" sap:VirtualizedContainerService.HintSize="242,93">
<InArgument x:TypeArguments="x:String" x:Key="key1">[RequestObj.CorrelationId]</InArgument>
</p1:InitializeCorrelation>
<FlowStep.Next>
<FlowStep x:Name="__ReferenceID3">
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">112.5,355</av:Point>
<av:Size x:Key="ShapeSize">255,90</av:Size>
<av:PointCollection x:Key="ConnectorLocation">240,445 240,475 241,475 241,479</av:PointCollection>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<p1:Receive CorrelatesWith="[handle]" sap:VirtualizedContainerService.HintSize="255,90" OperationName="GetClaim" ServiceContractName="p:IActivity4Service">
<p1:Receive.CorrelatesOn>
<p1:XPathMessageQuery x:Key="key1">
<p1:XPathMessageQuery.Namespaces>
<ssx:XPathMessageContextMarkup>
<x:String x:Key="xg0">http://schemas.datacontract.org/2004/07/Project.MessageWrappers</x:String>
</ssx:XPathMessageContextMarkup>
</p1:XPathMessageQuery.Namespaces>sm:header()/xg0:CorrelationId</p1:XPathMessageQuery>
</p1:Receive.CorrelatesOn>
<p1:ReceiveMessageContent DeclaredMessageType="qm:GetClaimObj">
<OutArgument x:TypeArguments="qm:GetClaimObj">[GetClaimIn]</OutArgument>
</p1:ReceiveMessageContent>
</p1:Receive>
<FlowStep.Next>
<FlowStep x:Name="__ReferenceID4">
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">120,479</av:Point>
<av:Size x:Key="ShapeSize">242,58</av:Size>
<av:PointCollection x:Key="ConnectorLocation">241,537 240,537 240,565</av:PointCollection>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<Assign sap:VirtualizedContainerService.HintSize="242,58">
<Assign.To>
<OutArgument x:TypeArguments="x:String">[GetClaimIn.InstanceId]</OutArgument>
</Assign.To>
<Assign.Value>
<InArgument x:TypeArguments="x:String">Get is called</InArgument>
</Assign.Value>
</Assign>
<FlowStep.Next>
<FlowStep x:Name="__ReferenceID5">
<sap:WorkflowViewStateService.ViewState>
<scg3:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">112.5,565</av:Point>
<av:Size x:Key="ShapeSize">255,90</av:Size>
</scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<p1:SendReply Request="{x:Reference __ReferenceID0}" DisplayName="SendReplyToReceive" sap:VirtualizedContainerService.HintSize="255,90">
<p1:SendMessageContent DeclaredMessageType="qm:GetClaimObj">
<InArgument x:TypeArguments="qm:GetClaimObj">[GetClaimIn]</InArgument>
</p1:SendMessageContent>
</p1:SendReply>
</FlowStep>
</FlowStep.Next>
</FlowStep>
</FlowStep.Next>
</FlowStep>
</FlowStep.Next>
</FlowStep>
</FlowStep.Next>
</FlowStep>
</Flowchart.StartNode>
<x:Reference>__ReferenceID1</x:Reference>
<x:Reference>__ReferenceID2</x:Reference>
<x:Reference>__ReferenceID3</x:Reference>
<x:Reference>__ReferenceID4</x:Reference>
<x:Reference>__ReferenceID5</x:Reference>
我错过了XAML中的CorrelationInitializers。 CorrelationInitializers用于使用原始请求在Receive或SendReply活动上创建关联。 之后，CorrelatesOn将在随后的接收活动中使用。
我遇到了同样的问题，并且链接到的文章实际上帮助我解决了这个问题。 在页面下方的3/4左右，有一个段落......
如果XPath查询配置不正确，导致没有检索到相关数据，则会返回一条错误消息，并显示以下消息：“相关性查询产生空结果集，请确保端点的相关查询配置正确。 解决此问题的一种快速方法是用前面部分中所述的文字值替换XPath查询。 如果您在“添加关联初始值设定项”或“关联元素定义”对话框中使用XPath查询构建器，并且您的工作流服务使用消息合约，则可能会发生此问题。
即使您选择的属性是消息标题的一部分，该对话框始终会生成目标消息正文属性的查询。 访问标题属性的正确查询是：
sm:header()/namespace:property
请注意，属性名称未由包含对象限定，因此以下查询应该适用于您：
sm:header()/tempuri:CorrelationId
如果您想要更改标题属性的Namespace ，请使用MessageHeaderAttribute类的Namespace属性。