a developer's notes – a semi-technical web development BLOG

April 25, 2014

jquery.validate : Unable to get property ‘getAttribute’ of undefined or null reference

Filed under: Javascript / JQuery — Duy Nguyen @ 12:31 pm
Tags: , , , , ,

I got this error recently in jquery.validate.js:
“Unable to get property ‘getAttribute’ of undefined or null reference”



Turns out the error was from a input type checkbox needing a name attribute and not just an Id attribute.

March 12, 2013

The type initializer for ‘System.Data.Entity.Internal.AppConfig’ threw an exception.

I had a class library project that contains the Entity Framework .edmx file. In the same solution, I had a console application that consumed the class library project. But when I tried to run the console application to run a simple query on the DbContext object, got this error:

The type initializer for ‘System.Data.Entity.Internal.AppConfig’ threw an exception.

In the app.config:

<?xml version="1.0" encoding="utf-8"?>
    <!-- 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=, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <add name="AdventureWorksLTEntities" connectionString="metadata=res://*/AWModel.csdl|res://*/AWModel.ssdl|res://*/AWModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=DNGUYEN-DESKTOP;initial catalog=AdventureWorksLT;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
        <parameter value="v11.0" />

Make sure the <startup> element is AFTER the <connectionStrings> element.

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