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我想让 WCF-over-TCP 服务正常工作。我在修改自己的项目时遇到了一些问题,所以我想从 VS2008 中包含的“基本”WCF 模板开始。

这是初始的 WCF App.config,当我运行该服务时,WCF 测试客户端可以正常使用它:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.web>
        <compilation debug="true" />
    </system.web>
    <system.serviceModel>
        <services>
            <service name="WcfTcpTest.Service1" behaviorConfiguration="WcfTcpTest.Service1Behavior">
                <host>
                    <baseAddresses>
                        <add baseAddress="http://localhost:8731/Design_Time_Addresses/WcfTcpTest/Service1/" />
                    </baseAddresses>
                </host>
                <endpoint address="" binding="wsHttpBinding" contract="WcfTcpTest.IService1">
                    <identity>
                        <dns value="localhost"/>
                    </identity>
                </endpoint>
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="WcfTcpTest.Service1Behavior">
                    <serviceMetadata httpGetEnabled="True"/>
                    <serviceDebug includeExceptionDetailInFaults="True" />
                </behavior>
            </serviceBehaviors>
        </behaviors>
    </system.serviceModel>
</configuration>

这完美地工作,完全没有问题。

我认为将其从 HTTP 更改为 TCP 将是微不足道的:将绑定更改为其 TCP 等效项并删除 httpGetEnabled serviceMetadata 元素:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.web>
        <compilation debug="true" />
    </system.web>
    <system.serviceModel>
        <services>
            <service name="WcfTcpTest.Service1" behaviorConfiguration="WcfTcpTest.Service1Behavior">
                <host>
                    <baseAddresses>
                        <add baseAddress="net.tcp://localhost:1337/Service1/" />
                    </baseAddresses>
                </host>
                <endpoint address="" binding="netTcpBinding" contract="WcfTcpTest.IService1">
                    <identity>
                        <dns value="localhost"/>
                    </identity>
                </endpoint>
                <endpoint address="mex" binding="mexTcpBinding" contract="IMetadataExchange"/>
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="WcfTcpTest.Service1Behavior">
                    <serviceDebug includeExceptionDetailInFaults="True" />
                </behavior>
            </serviceBehaviors>
        </behaviors>
    </system.serviceModel>
</configuration>

但是当我运行它时,我在 WCF 服务主机中收到此错误:

System.InvalidOperationException:在服务 Service1 实施的合同列表中找不到合同名称“IMetadataExchange”。将 ServiceMetadataBehavior 添加到配置文件或直接添加到 ServiceHost 以启用对此协定的支持。

我感觉您无法使用 TCP 发送元数据,但这就是为什么有 mexTcpBinding 选项的原因?

4

1 回答 1

21

好吧,如果你想拥有元数据——TCP 或 HTTP——你仍然需要包含serviceMetadata行为!

<behaviors>
    <serviceBehaviors>
        <behavior name="WcfTcpTest.Service1Behavior">
            <serviceDebug includeExceptionDetailInFaults="True" />
            <serviceMetadata />
        </behavior>
    </serviceBehaviors>
</behaviors>

当然,您不能在其上使用“HttpGetEnabled” - 但必须存在行为本身才能启用元数据(以及IMetadataExchange合同)的交换。

于 2010-04-05T15:53:50.133 回答