Question

尝试通过WCF服务传递DTO时出现以下异常。

System.Xml.XmlException: The maximum read depth (32) has been exceeded because XML data being read has more levels of nesting than is allowed by the quota. This quota may be increased by changing the MaxDepth property on the XmlDictionaryReaderQuotas object used when creating the XML reader. Line 1, position 5230.
   at System.Xml.XmlExceptionHelper.ThrowXmlException

app.config绑定看起来像这样

    <binding name="WSHttpBinding_IProjectWcfService" closeTimeout="00:10:00"
      openTimeout="00:10:00" receiveTimeout="00:10:00" sendTimeout="00:10:00"
      bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
      maxBufferPoolSize="524288" maxReceivedMessageSize="10240000" messageEncoding="Text"
      textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false">
      <readerQuotas maxDepth="200" maxStringContentLength="8192" maxArrayLength="16384"
        maxBytesPerRead="4096" maxNameTableCharCount="16384" />
      <reliableSession ordered="true" inactivityTimeout="00:10:00"
        enabled="false" />
      <security mode="Message">

        <transport clientCredentialType="Windows" proxyCredentialType="None" realm="">
          <extendedProtectionPolicy policyEnforcement="Never" />
        </transport>
        <message clientCredentialType="UserName" negotiateServiceCredential="true"
          algorithmSuite="Default" establishSecurityContext="true" />
      </security>
    </binding>

Web.config服务行为：

    <behavior name="BehaviorConfiguration" >
      <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
      <dataContractSerializer maxItemsInObjectGraph="6553600" />
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
      <serviceAuthorization principalPermissionMode="UseAspNetRoles" roleProviderName="SqlRoleProvider" />
      <serviceCredentials>
        <serviceCertificate findValue="localhost" x509FindType="FindBySubjectName" storeLocation="LocalMachine" storeName="My" />

        <userNameAuthentication userNamePasswordValidationMode="MembershipProvider" membershipProviderName="SqlMembershipProvider"/>
      </serviceCredentials>
    </behavior>

DTO看起来像这样：

[Serializable]
[DataContract(IsReference=true)]
public class MyDto
{

任何帮助都会受到赞赏，因为我正在用它拉出我的头发。

Answer 1

maxDepth上有一个名为<readerQuotas>的设置，您可以将其设置为高于32（默认值）的值。你显然已经在客户端设置了这个（到maxDepth = 200），但你也需要在服务器端这样做 - 否则，两个值中较小的一个（在客户端和服务器之间）将定义使用的实数。

确保您的服务器端还在其wsHttpBinding配置中包含这些行：

<readerQuotas maxDepth="200" maxStringContentLength="8192" maxArrayLength="16384"
        maxBytesPerRead="4096" maxNameTableCharCount="16384" />

Answer 2

您必须更改客户端和服务器上的绑定配置以匹配...

WCF最大读取深度异常

2 个答案: