我在 wcf 和 Web Api REST Web 服务中获取 System.Threading.Tasks.Task.ThrowIfExceptional 以获取大数据

Question

我已经创建了 WCF 和 Web Api REST 完整的 Web 服务。在这个网络服务中，我得到了

用于大数据传输。

EX：在这种情况下，我有 25 列和 25000 行的 fetch 查询，有时数据来了，有时

这两个错误都会出现。 我的 WCF 配置。像这样

那么任何人都可以建议我。

Answer 1

尝试在 web config reader quoata 中设置绑定 对于大传输，defualt 小

详情：http://msdn.microsoft.com/en-us/library/ms731325(v=vs.110).aspx

例子

<binding name="myLargeBinding" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
    <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" maxArrayLength="2147483647"/>
</binding>

然后不要忘记将此 bindningConfiguration 设置为端点

<endpoint ....  binding="basicHttpBinding" bindingConfiguration="myLargeBinding" .... >

对于您的 web.config，它应该是这样的。

我创建了新的绑定配置“RESTBinding”并将其设置到您的端点。

  <?xml version="1.0"?>
<configuration>
  <system.web>
    <compilation debug="true"  />
    <httpRuntime maxRequestLength ="1048576"/>
  </system.web>
  <system.serviceModel>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true"></serviceHostingEnvironment>
    <services>
      <service behaviorConfiguration="" name="wcfTestHC.TestHC">
        <endpoint address="" behaviorConfiguration="RestEndpointBehavior" binding="webHttpBinding" bindingConfiguration="RESTBinding" contract="wcfTestHC.ITestHC"  />
        <endpoint contract="IMetadataExchange" binding="mexHttpBinding" address="mex" />
      </service>
    </services>
    <behaviors>
      <endpointBehaviors>
        <behavior name="RestEndpointBehavior">
          <webHttp  helpEnabled="true" />
          <dataContractSerializer maxItemsInObjectGraph="2147483647" />
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior name="Default">
          <serviceMetadata httpGetEnabled="true" />
          <serviceThrottling maxConcurrentCalls="250" maxConcurrentInstances="75" maxConcurrentSessions="50"/>
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
        </behavior>
        <behavior name="">
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <bindings>
      <webHttpBinding>
        <binding  name="RESTBinding" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00"
                 sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
          maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" maxBufferSize="2147483647"
          useDefaultWebProxy="true">
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"  maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" maxArrayLength="2147483647"/>        
        </binding>
      </webHttpBinding>
      <wsHttpBinding>
        <binding name="EndpointBehavior" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00"
                 sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
          maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8"
          useDefaultWebProxy="true">
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" maxArrayLength="2147483647"/>
          <reliableSession enabled="True" ordered ="True "/>
        </binding>
      </wsHttpBinding>
    </bindings>
    <diagnostics>
      <messageLogging logEntireMessage="true" logMalformedMessages="true" logMessagesAtServiceLevel="true" logMessagesAtTransportLevel="true" maxMessagesToLog="3000" />
    </diagnostics>     
  </system.serviceModel>
 <system.diagnostics>
    <switches>
      <add name="XmlSerialization.Compilation" value="4"/>
  </switches>
   <sources>
      <source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true">
        <listeners>
          <add name="xml" />
        </listeners>
      </source>
      <source name="System.ServiceModel.MessageLogging">
        <listeners>
          <add name="xml" />
        </listeners>
      </source>
    </sources>
    <sharedListeners>
      <add name="xml" type="System.Diagnostics.XmlWriterTraceListener" initializeData="c:\temp\WCFLoging.svclog" />
    </sharedListeners>
  </system.diagnostics>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
    <directoryBrowse enabled="true"/>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength ="1073741824"></requestLimits>
      </requestFiltering>
    </security>
  </system.webServer>
</configuration>

如果您仍然遇到错误。也许问题出在其他地方。 尝试将这些设置插入您的 web.config。这将为您的服务提供详细的日志记录和异常详细信息，我们将在那里查看问题所在。我已将日志的位置设置为 c:\temp\WCFLoging.svclog，如果需要，请更改它，并且我已经使用这些设置编辑了 web.config 的示例 - 准备好复制和粘贴 :-)

<system.serviceModel>
    <diagnostics>
      <messageLogging logEntireMessage="true" logMalformedMessages="true" logMessagesAtServiceLevel="true" logMessagesAtTransportLevel="true" maxMessagesToLog="3000" />
    </diagnostics>     
  </system.serviceModel>

和

<system.diagnostics>
    <switches>
      <add name="XmlSerialization.Compilation" value="4"/>
  </switches>
   <sources>
      <source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true">
        <listeners>
          <add name="xml" />
        </listeners>
      </source>
      <source name="System.ServiceModel.MessageLogging">
        <listeners>
          <add name="xml" />
        </listeners>
      </source>
    </sources>
    <sharedListeners>
      <add name="xml" type="System.Diagnostics.XmlWriterTraceListener" initializeData="c:\temp\WCFLoging.svclog" />
    </sharedListeners>
  </system.diagnostics>