Question

我正在尝试将IDbCommandInterceptor集成到我的项目中。我正在使用EntityFramework 6.0版。我创建了这样的拦截器类：

namespace MyApp.Data
{
    public class EFCommandInterceptor : IDbCommandInterceptor
    {
        public void NonQueryExecuted(System.Data.Common.DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
        {
            LogInfo("NonQueryExecuted", String.Format(" IsAsync: {0}, Command Text: {1}", interceptionContext.IsAsync, command.CommandText));
        }

        public void NonQueryExecuting(System.Data.Common.DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
        {
            LogInfo("NonQueryExecuting", String.Format(" IsAsync: {0}, Command Text: {1}", interceptionContext.IsAsync, command.CommandText));
        }

        public void ReaderExecuted(System.Data.Common.DbCommand command, DbCommandInterceptionContext<System.Data.Common.DbDataReader> interceptionContext)
        {
            LogInfo("ReaderExecuted", String.Format(" IsAsync: {0}, Command Text: {1}", interceptionContext.IsAsync, command.CommandText));
        }

        public void ReaderExecuting(System.Data.Common.DbCommand command, DbCommandInterceptionContext<System.Data.Common.DbDataReader> interceptionContext)
        {
            LogInfo("ReaderExecuting", String.Format(" IsAsync: {0}, Command Text: {1}", interceptionContext.IsAsync, command.CommandText));
        }

        public void ScalarExecuted(System.Data.Common.DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
        {
            LogInfo("ScalarExecuted", String.Format(" IsAsync: {0}, Command Text: {1}", interceptionContext.IsAsync, command.CommandText));
        }

        public void ScalarExecuting(System.Data.Common.DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
        {
            LogInfo("ScalarExecuting", String.Format(" IsAsync: {0}, Command Text: {1}", interceptionContext.IsAsync, command.CommandText));
        }

        private void LogInfo(string command, string commandText)
        {
            Console.WriteLine("Intercepted on: {0} :- {1} ", command, commandText);
        }
    }
}

当我尝试使用代码配置添加此拦截器类时，它的工作正常。但我想在文章Interception中使用配置设置添加此拦截器。我的配置文件如下所示：

<entityFramework>
<interceptors>
  <interceptor type="MyApp.Data.EFCommandInterceptor, MyApp.Data"></interceptor>
</interceptors>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
  <parameters>
    <parameter value="v11.0" />
  </parameters>
</defaultConnectionFactory>
<providers>
  <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>

但它给出的错误是：

无法识别的元素＆＃39;拦截器＆＃39;

我在app配置文件中设置了实体配置：

<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />

注意：我的数据访问层位于单独的类库中。 EDMX文件存在于数据项目中。表示层引用了数据层。实体框架存在于项目中且具有相同的版本。

Answer 1

我通过更新Entity Framework的版本解决了这个问题。

旧版本：6.0.2 更新版本：6.1.3

Answer 2

简答：EF拦截器只能配置从6.1开始的配置文件，参考

EF Config settings from Microsoft

长答案：此外，如果您去检查C：\ Program Files（x86）\ Microsoft Visual Studio 12.0 \ Xml \ Schemas目录并尝试打开EntityFrameworkConfig_6_0_0.xsd，您会注意到拦截器未声明为子元素：

EntityFrameworkConfig_6_0_0.xsd的内容（不包含拦截器标签）

 <xs:element name="entityFramework">
    <xs:complexType>
    <xs:all>
    <xs:element name="defaultConnectionFactory" type="ElementWithTypeAndParameters_Type" minOccurs="0" maxOccurs="1" />
    <xs:element name="providers" type="ProviderList_Type" minOccurs="0" maxOccurs="1" />
    <xs:element name="contexts" type="ContextList_Type" minOccurs="0" maxOccurs="1" />
    </xs:all>
    <xs:attribute name="codeConfigurationType" type="NonEmptyString_Type" use="optional" />
    <xs:anyAttribute namespace="http://schemas.microsoft.com/XML-Document-Transform" processContents="strict"/>
    </xs:complexType>
    </xs:element>

EntityFrameworkConfig_6_1_0.xsd的内容（包含拦截器标签）

 <xs:element name="entityFramework">
    <xs:complexType>
      <xs:all>
        <xs:element name="defaultConnectionFactory" type="ElementWithTypeAndParameters_Type" minOccurs="0" maxOccurs="1" />
        <xs:element name="providers" type="ProviderList_Type" minOccurs="0" maxOccurs="1" />
        <xs:element name="contexts" type="ContextList_Type" minOccurs="0" maxOccurs="1" />
        <xs:element name="interceptors" type="InterceptorList_Type" minOccurs="0" maxOccurs="1" />
      </xs:all>
      <xs:attribute name="codeConfigurationType" type="NonEmptyString_Type" use="optional" />
      <xs:anyAttribute namespace="http://schemas.microsoft.com/XML-Document-Transform" processContents="strict"/>
    </xs:complexType>
  </xs:element>

EntityFramework Interceptor无法在Config File中使用

2 个答案: