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Entity Framework

A collection of 16 posts

Entity Framework

Introduction to Entity Framework 4.3 Migrations - Part II

In Part I [http://www.codetunnel.io/blog/post/110/entity-framework-43-migrations--part-i] I discussed the new Entity Framework Migrations and why they are so useful. In this part I want to actually walk you through the process of building a code-first project and using migrations to make changes to your database

Entity Framework

Introduction to Entity Framework 4.3 Migrations - Part I

The more I work with Entity Framework [http://en.wikipedia.org/wiki/ADO.NET_Entity_Framework] (EF), the more I love it. Each new release brings with it so many amazing new features that it's hard to keep up with them all. The team behind Entity Framework is working hard

Entity Framework

What to do if Entity Framework Function Import Does Not Detect Any Columns Being Returned by your Stored Procedure

If you work with Entity Framework [http://msdn.microsoft.com/en-us/library/aa697427(v=vs.80).aspx] (EF) and a database full of stored procedures then chances are that at some point you have encountered this problem. I recently tried to map a function import to a stored procedure that

Entity Framework

Introduction to Entity Framework: Part IV - IQueryable

This is part four of my Entity Framework tutorial. If you have not read the previous parts of this tutorial and you do not know how to setup EF and write LINQ queries against it then please read those first. Table of Contents * Part I - Object Relational Mapping [http:

Entity Framework

Introduction to Entity Framework: Part III - Building the Model

This is part three of my tutorial series on Entity Framework. If you have not read parts one or two and do not have a good understanding of what an Object Relational Mapper (ORM) is or how to setup a basic SQL Server Express database, then please read those parts

Entity Framework

Introduction to Entity Framework: Part II - Designing the Database

This is part two of my tutorial series on Entity Framework. If you have not read part one and do not have a good understanding of what an Object Relational Mapper (ORM) is, then please read part one first. Table of Contents * Part I - Object Relational Mapping [http://codetunnel.

Entity Framework

Introduction to Entity Framework: Part I - Object Relational Mapping

Table of Contents * Part II - Designing the Database [http://codetunnel.io/introduction-to-entity-framework-part-ii-designing-the-database] * Part III - Building the Model [http://codetunnel.io/introduction-to-entity-framework-part-iii-building-the-model] * Part IV - IQueryable [http://codetunnel.io/introduction-to-entity-framework-part-iv-iqueryable/] -------------------------------------------------------------------------------- Now that I've completed my Introduction to LINQ [

Introduction to LINQ: Part IV - Putting it All Together

This is part four of my introduction to LINQ tutorial. If you have not read the previous parts in this series and you do not have a decent understanding of delegates, lambdas, and extension methods then please go back and check those out first. Table of Contents * Part I -

Introduction to LINQ: Part III - Extension Methods

This is part three of my introduction to LINQ tutorial. If you have not read parts one and two and you do not have a decent understanding of delegates and/or lambda expressions, then please head over and read those first. Table of Contents * Part I - Delegates [http://codetunnel.

Introduction to LINQ: Part II - Lambda Expressions

This is part two of my introduction to LINQ tutorial. If you have not read part one and do not have a decent understanding of delegates in C# then please head over and read that first [http://www.codetunnel.io/introduction-to-linq-part-i-delegates]. Table of Contents * Part I - Delegates [http://codetunnel.

Introduction to LINQ: Part I - Delegates

Table of Contents * Part II - Lambda Expressions [http://codetunnel.io/introduction-to-linq-part-ii-lambda-expressions] * Part III - Extension Methods [http://codetunnel.io/introduction-to-linq-part-iii-extension-methods] * Part IV - Putting it All Together [http://codetunnel.io/introduction-to-linq-part-iv-putting-it-all-together] -------------------------------------------------------------------------------- Recently I had to explain Language Integrated Queries [http://en.wikip

Entity Framework

How to Map a Stored Procedure with Multiple Result Sets to a Function Import in Entity Framework

Function imports are a pretty cool way of implementing stored procedures in Entity Framework. Most of the time it is a very straight forward process of adding the stored procedure to your model, creating the function import, getting column information, and building a new complex type. However, sometimes you may

Entity Framework

Lazy Loading Explained

It took me a while to understand Entity Framework (EF) and lazy loading, but now that I do I wanted to put it down somewhere so I don't forget it. Maybe this will benefit someone else with a similar issue. When you create entities with EF you are creating self-tracking

Entity Framework

How to Map a Stored Procedure to an Entity in Entity Framework 4

The first thing you have to decide when mapping a stored procedure through Entity Framework (EF) is what type of object you're really after. You might think you want an Entity and design it all out on the EF design surface, but that may not be what you really need.

Entity Framework

Ninject and Entity Framework Object Context Problems

Today I had an issue with Entity Framework and caching. We have two applications that access the database. For some reason when I would update data in one application, it would not update in the other application for a while. I knew this had to be a caching issue but

Entity Framework

Validation With Entity Framework

This is a topic I spent an entire weekend working on while developing Code Tunnel because it is very poorly documented and little information exists regarding it. A Little Background Entity Framework [http://msdn.microsoft.com/en-us/library/aa697427(v=vs.80).aspx] (EF) is an Object Relational Mapper [http: