No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'

Fixing the “No Entity Framework provider found for the ADO.NET provider with invariant name ‘System.Data.SqlClient'” error

This post describes the fix to THE “No Entity Framework provider found for the ADO.NET provider with invariant name ‘System.Data.SqlClient’” error, which Visual Studio throws at your face when you try to run an application on any Windows-based system (or which you’ve dug out of event logs). Also, your application is…Continue reading Fixing the “No Entity Framework provider found for the ADO.NET provider with invariant name ‘System.Data.SqlClient’” error

Applying Entity Framework’s Code-First Migrations against a Database in Azure by running Update-Database

This post describes how to run Entity Framework’s code-first migrations against a database located in Windows Azure. This is done by running the Update-Database commandlet with suitable switches, see below. The problem and symptoms Okay, so you’re developing your MVC+EF cool web app with a database in Azure, and you’re…Continue reading Applying Entity Framework’s Code-First Migrations against a Database in Azure by running Update-Database

entity-framework-logo

Fixing the error: “Column XX in table dbo.YY is of a type that is invalid for use as a key column in an index.”

While using Entity Framework and code-first migrations, Entity Framework (EF) creates the indexes for you – but what if you need to create a custom one, explicitly based on a certain field/column? Then you’ll have to tell EF which one to use as a key column. Usually, it’s easy –…Continue reading Fixing the error: “Column XX in table dbo.YY is of a type that is invalid for use as a key column in an index.”

Entity Framework's Update-Database throwing an error

Fixing “An error occurred while updating the entries” while running code-first migrations in MVC 5 app

This post describes an issue with EF’s code-first migrations, when mapping between DB’s DateTime (datetime2) and C#’s DateTime simply fails, and results in the Update-Database cmdlet failing, too. It is more or less a prime example of a situation, where the error itself tells very little about the actual issue,…Continue reading Fixing “An error occurred while updating the entries” while running code-first migrations in MVC 5 app