发生了System.TypeInitializationException

Question

I am making application in ASP.NET MVC 5 C#. I am getting exception while trying to access connection string element from web.config file.

An exception of type 'System.TypeInitializationException' occurred in WebPortalClient.dll but was not handled in user code

Web.Config:

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=301880
  -->
<configuration>  
  <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" />
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <section name="WebPortalClient.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>
  </configSections>
  <connectionStrings>
    <!--<add name="DefaultConnection" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=aspnet-WebPortalClient-20140714023603;Integrated Security=True"
      providerName="System.Data.SqlClient" />-->
    <add name="WebPortalClient.Properties.Settings.ConnectionString"
      connectionString="Data Source=192.168.1.141;Initial Catalog=Dishkau;User ID=saud;Password=rakeord1"
      providerName="System.Data.SqlClient" />
  </connectionStrings>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <authentication mode="None" />
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" maxRequestLength="1048576" />
    <sessionState mode="InProc" timeout="99999" />
  </system.web>

  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <security>
        <requestFiltering>
           <!-- Set the maximum request size to 1GB (the value is in Bytes here) -->
            <requestLimits maxAllowedContentLength="1073741824" />
        </requestFiltering>
    </security>
    <modules>
      <remove name="FormsAuthentication" />

    </modules>

  <!--<modules>
      <add name="SingleSessionEnforcement" type="SingleSessionEnforcement" />
    </modules>-->
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
<system.web.extensions>
        <scripting>
            <webServices>
                <jsonSerialization maxJsonLength="1000000">
                </jsonSerialization>
            </webServices>
        </scripting>
    </system.web.extensions>
  <applicationSettings>
    <WebPortalClient.Properties.Settings>
      <setting name="UploadServiceUrl" serializeAs="String">
        <value>192.168.1.141:8085/lupload/</value>
      </setting>
      <setting name="LicenseName" serializeAs="String">
        <value>ARL</value>
      </setting>
    </WebPortalClient.Properties.Settings>
  </applicationSettings>
</configuration>

I tried this but it was of no help. Please help me out.

Answer 1

A solution i've found about it:

This exception means that the following line fails(check for the fitting line in your code):

public static string ConString = 
    ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;

Make sure that no exception happens here!

Whenever TypeInitializationException is thrown, check all initialization logic of the type you are referring to for the first time in the statement where the exception is thrown.

If it is not working you can use this post