读取 XML 数据时已超出最大可命名字符数配额 (16384)

Question

当我尝试读取元数据时出现此错误，这里的任何想法都是我的代码

WSHttpBinding binding = new WSHttpBinding(SecurityMode.None);
binding.MaxReceivedMessageSize = Int32.MaxValue; // DPNote: This may actually be too big.  see how it performs.
binding.ReaderQuotas.MaxNameTableCharCount = 99999999;

MetadataExchangeClientMode exchangeMode = MetadataExchangeClientMode.HttpGet; // Default to a HttpGET
metaClient = new MetadataExchangeClient(binding);
metaClient.MaximumResolvedReferences = 10 * 100; //DPNote: Some arbitrary number.  Default is 10, so this is bigger.


if (address.Scheme == "http")
  exchangeMode = MetadataExchangeClientMode.HttpGet;
else if (address.Scheme == "https")
  exchangeMode = MetadataExchangeClientMode.HttpGet;
else
  exchangeMode = MetadataExchangeClientMode.MetadataExchange;

MetadataSet metadata = metaClient.GetMetadata(address, exchangeMode);
MetadataImporter importer = new WsdlImporter(metadata);

这是引发错误的行

MetadataSet metadata = metaClient.GetMetadata(address, exchangeMode);

Answer 1

如果您通过 Visual Studio 执行“更新参考”，请将这些行添加到 devenv.exe.config

<system.serviceModel>

 <client>

 <endpoint binding="netTcpBinding" bindingConfiguration="GenericBinding" contract="IMetadataExchange" name="net.tcp" />

 </client>

 <bindings>

 <netTcpBinding>

 <binding name="GenericBinding"

 maxBufferPoolSize="2147483647" maxBufferSize="2147483647"

 maxReceivedMessageSize="2147483647">

 <readerQuotas maxDepth="2147483647"

 maxStringContentLength="2147483647"

 maxArrayLength="2147483647"

 maxBytesPerRead="2147483647"

 maxNameTableCharCount="2147483647" />

 <security mode="None" />

 </binding>

 </netTcpBinding>

 </bindings>

 </system.serviceModel>

Answer 2

这是微软代码的错误，Http-Get不支持Reader Quotas，所以我们可以这样做

      var smAsm = AppDomain.CurrentDomain.GetAssemblies().First(a => a.FullName.StartsWith("System.ServiceModel,"));
        var defTy = smAsm.GetType("System.ServiceModel.Channels.EncoderDefaults");
        var rq = (System.Xml.XmlDictionaryReaderQuotas)defTy.GetField("ReaderQuotas", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic).GetValue(null);
        rq.MaxArrayLength = int.MaxValue;
        rq.MaxDepth = int.MaxValue;
        rq.MaxNameTableCharCount = int.MaxValue;
        rq.MaxStringContentLength = int.MaxValue; 

Answer 3

您是否尝试过将binding.ReaderQuotas 内的任何其他值增加到超出其默认值：

maxDepth、maxStringContentLength、maxArrayLength、maxBytesPerRead?

也可以是binding的maxBufferPoolSize

Answer 4

这个问题似乎在 .NET 4.0 中得到解决。根据 Reflector 的说法，MetadataExchangeClient 现在从提供的绑定中读取配额，如果没有，它会回退到 EncoderDefaults。以前，我认为它只使用了 EncoderDefaults，这就是为什么 @BreakHead 的解决方案似乎是唯一的解决方案（通过反射更改 EncoderDefaults）。