asp.net-mvc - ELMAH 缺少连接字符串

Question

我正在尝试配置 ELmah与我的 mvc 应用程序一起使用。

错误提示

Connection string is missing for the SQL error log

但是我检查了我的 Web.config，连接字符串就在那里。我不确定是什么导致了这个问题。在ErrorLogPage.cs中，connectionString始终具有空值

 public SqlErrorLog(IDictionary config)
        {
            if (config == null)
                throw new ArgumentNullException("config");

            string connectionString = ConnectionStringHelper.GetConnectionString(config);

            //
            // If there is no connection string to use then throw an 
            // exception to abort construction.
            //

            if (connectionString.Length == 0)
                throw new ApplicationException("Connection string is missing for the SQL error log.");

            _connectionString = connectionString;

            ...
        }

网络配置

<configuration>
  <configSections>
    <sectionGroup name="elmah">
      <section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah" />
      <section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah" />
      <section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah" />
      <section name="errorFilter" requirePermission="false" type="Elmah.ErrorFilterSectionHandler, Elmah" />
    </sectionGroup>
  </configSections>

  <connectionStrings>
    <add name="sql-elmah" providerName="System.Data.SqlClient" connectionString="Data Source=xxx;Initial Catalog=xxx;user=xxx;password=xxx" />
    <add name="EFDbContext" providerName="System.Data.SqlClient" connectionString="Data Source=yyy;Initial Catalog=yyy;user=yyy;password=yyy;" />
  </connectionStrings>

  <elmah>
    <security allowRemoteAccess="0" />
    <errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="sql-elmah" />
  </elmah>

  <system.web>
      <httpHandlers>
        <add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
      </httpHandlers>

      <httpModules>
        <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/>
      </httpModules>
  </system.web>

  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />

    <modules>
      <add name="Elmah.ErrorLog" type="Elmah.ErrorLogModule, Elmah" preCondition="managedHandler" />
    </modules>

    <handlers>
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" />
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" />
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />

      <add name="Elmah" verb="POST,GET,HEAD" path="elmah.axd" preCondition="integratedMode" type="Elmah.ErrorLogPageFactory, Elmah" />
    </handlers>
  </system.webServer>

</configuration>

Answer 1

我删除了 Elmah 引用。单击“管理 Nuget 包”按钮再次添加 Elmah 引用。在线浏览“Elmah”并安装。之后，错误更改为“无法加载System.Data.SQLite”。我使用相同的过程来安装 SQLite。问题已解决