18 June 2015 13:56
This article looks at how to configure Entity Framework to manage many to many relationships based on the same table. This scenario arises the same entity is related to itself in a different role. An example is the related product feature you might see in a "People also bought" section of an ecommerce site. Another is the relationship between clients and agencies in the advertising and marketing world. That scenario will form the basis of the illustration below.
Viewed 5612 times
23 April 2015 13:19
This post explores the options available to you when your application requirements include managing and storing time using the Entity Framework. Specifically, I am thinking of durations of time, such as the time required to complete some kind of task, not the time part of a date. Relevant examples might include storing the length of a movie, or the preparation time required for a recipe.
Viewed 4651 times
18 February 2015 13:16
If you have built sites with the ASP.NET Razor Web Pages framework, you might want to look at migrating them to ASP.NET MVC at some point. This tutorial is the second in a series of three that explores how you do that by taking a step by step approach to migrating the WebMatrix Bakery template site to ASP.NET MVC 5. Along the way, each of the core parts of MVC are discussed by way of an introduction to the framework. The tutorial is divided into three parts. The first part looked at the roles of the View and Controller. This part looks at the M in MVC, the Model. Specifically, it features data access and view models. The final part will cover model binding and form posting. A download (c. 24MB) featuring the completed application is available.
Viewed 10388 times
12 January 2015 20:38
This is the latest in a series of "EF Recipes" - short articles that show through practical examples how to achieve common tasks with Entity framework and ASP.NET MVC. This particular example looks at grouping data by year and month in MVC 5 with Entity Framework 6. The article is prompted by an email I got from a reader who asked how I generate the "Archives" feature in the right hand panel on each page on this site.
Viewed 20376 times
29 October 2014 20:53
This article looks at using the alphabet for paging data in MVC 5 with Entity Framework 6. Where it differs from most existing articles on alphabetical paging is that this article looks at generating paging links from the data instead of the alphabet. It also features a Bootstrap-friendly helper for generating the paging links.
Viewed 22165 times
24 October 2014 22:20
This article explores how to use Entity Framework 6 to manage the retrieval and display of hierarchical data such as you might find in a menu system. There are a number of existing items on the Internet that cover the same topic, but most of them seem unnecessarily complex and don't include any information about displaying the data once it has been retrieved.
Viewed 29568 times
13 June 2014 13:42
This tutorial is the last in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. This final tutorial introduces several topics that are useful to be aware of when you go beyond the basics of developing ASP.NET web applications that use Entity Framework Code First. Step-by-step instructions walk you through the code and using Visual Studio Express For Web for the following topics:
Viewed 31931 times
13 June 2014 13:42
This tutorial is the eleventh in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. In the previous tutorial you handled concurrency exceptions. This tutorial will show you how to implement inheritance in the data model.
Viewed 11450 times
13 June 2014 13:41
This tutorial is the tenth in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. In earlier tutorials you learned how to update data. This tutorial shows how to handle conflicts when multiple users update the same entity at the same time. You'll change the web pages that work with the Department entity so that they handle concurrency errors.
Viewed 14744 times
13 June 2014 13:40
This tutorial is the ninth in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. In earlier tutorials you learned how to read and update data using the synchronous programming model. In this tutorial you see how to implement the asynchronous programming model. Asynchronous code can help an application perform better because it makes better use of server resources.
Viewed 17976 times
13 June 2014 13:39
This tutorial is the eighth in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. In the previous tutorial you displayed related data; in this tutorial you'll update related data. For most relationships, this can be done by updating either foreign key fields or navigation properties. For many-to-many relationships, the Entity Framework doesn't expose the join table directly, so you add and remove entities to and from the appropriate navigation properties.
Viewed 13053 times
13 June 2014 13:39
This tutorial is the seventh in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. In the previous tutorial you completed the School data model. In this tutorial you'll read and display related data — that is, data that the Entity Framework loads into navigation properties.
Viewed 11729 times
13 June 2014 13:38
This tutorial is the sixth in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. In the previous tutorials you worked with a simple data model that was composed of three entities. In this tutorial you'll add more entities and relationships, and you'll customize the data model by specifying formatting, validation, and database mapping rules. You'll see two ways to customize the data model: by adding attributes to entity classes and by adding code to the database context class.
Viewed 22363 times
13 June 2014 13:37
This tutorial is the fifth in a series of 12 that teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. This tutorial covers how to enable Code First Migrations and then deploy your database to Windows Azure. The Migrations feature enables you to change the data model and deploy your changes to production by updating the database schema without having to drop and re-create the database. The section covering deployment to Azure is optional; you can continue with the remaining tutorials without having deployed the project.
Viewed 12736 times
13 June 2014 13:36
This tutorial is the fourth in a series of 12 which teach you how to build MVC 5 applications using Entity Framework for data access and Visual Basic. This tutorial covers how to use two features of Entity Framework 6 that are especially valuable when you are deploying to the cloud environment: connection resiliency (automatic retries for transient errors) and command interception (catch all SQL queries sent to the database in order to log or change them).
Viewed 8447 times
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