我创建了一个带有netstandard2.0
定位库而非共享或PCL库的Xamarin.Forms项目。到目前为止,这编译和工作。我使用的是Visual Studio 2017社区的up2date版本。
我还创建了一个WCF服务,它将托管在Windows本身(而不是IIS)上。我已将app.config配置为提供元数据交换端点:
<?xml version="1.0"?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
<system.serviceModel>
<services>
<service behaviorConfiguration="MM.Server.ServiceServerBehavior" name="MM.Server.ServiceServer">
<endpoint address="net.tcp://localhost:8730/MMServer/" binding="netTcpBinding" bindingConfiguration="NetTcpBinding_IServiceServer" bindingName="NetTcpBinding_IServiceServer_EndPoint" contract="MM.Contracts.IServiceServer">
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
<endpoint address="http://localhost:8731/MMServer/mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
<host>
<baseAddresses>
<add baseAddress="net.tcp://localhost:8730/MMServer/"/>
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="MM.Server.ServiceServerBehavior">
<serviceMetadata httpGetEnabled="true" httpGetUrl="http://localhost:8731/MMServer/mex" />
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
<bindings>
<netTcpBinding>
<binding name="NetTcpBinding_IServiceServer" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions" hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="2147483647" maxBufferSize="2147483647" maxConnections="10" maxReceivedMessageSize="2147483647">
<readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="16384"/>
<reliableSession ordered="true" inactivityTimeout="01:00:00" enabled="false"/>
<security mode="None"><!-- TODO: Add more security later -->
<transport clientCredentialType="None" protectionLevel="None"/>
</security>
</binding>
</netTcpBinding>
</bindings>
</system.serviceModel>
</configuration>
这是一个非常简单的配置,我现在不关心安全性。该服务成功运行。
现在我不能简单地向我的Xamarin.Forms项目添加服务引用,因为netstandard
不提供System.ServiceModel
。
我发现Silverlight SDK中的I can use the SLsvcUtil.exe为我的WCF服务生成客户端代理,该服务与目标netstandard
的Xamarin.Forms兼容,但是我无法让它运行。
无论我在WCF服务运行时如何尝试使用SLsvcUtil.exe,我总是收到错误:
Error: An error occurred in the tool.
Error: Object reference not set to an instance of an object.
这是我用来执行SLsvcUtil.exe的批处理:
set "namespace=*,MM.Services"
set "mexPath=http://localhost:8731/MM/mex"
set "svcutil=C:\Program Files (x86)\Microsoft SDKs\Silverlight\v5.0\Tools\SLsvcUtil.exe"
set "outputDir=C:\vsproj\Xamarin\MM\MM.App"
"%svcutil%" %mexPath% /directory:"%outputDir%" /namespace:"%namespace%"
pause
http://localhost:8731/MM/mex成功返回完整的WSDL。
如何为我的定位netstandard2.0
的Xamarin.Forms应用获取有效的客户端代理?我打开任何可以产生相同结果的替代方案。
答案 0 :(得分:4)
查看.NET Core的官方Microsoft WCF客户端。我认为这也适用于Xamarin,因为它是为.NET Core设计的。