Asp gridview rowupdating newvalues

28 Sep

In the third tutorial in this series you will add sorting and filtering functionality to the application.The pages you create in this tutorial work with the entity set of the data model that you created in the Getting Started tutorial series.You can also download the application that is created by the complete tutorial series.The Contoso University sample web application demonstrates how to create ASP.It includes functionality such as student admission, course creation, and instructor assignments. The downloadable sample contains code in both C# and Visual Basic. NET MVC framework, see Getting Started with the Entity Framework using ASP. application structure that's more maintainable. To implement this architecture, you separate the presentation layer from the business logic layer (BLL) and the data access layer (DAL).There are three ways you can work with data in the Entity Framework: . For information about the differences between these workflows and guidance on how to choose the best one for your scenario, see Entity Framework Development Workflows. One way to implement this structure is to use the pages using a control that has many of the same features as other data-source controls.Like the Getting Started series, this tutorial series uses the ASP. This lets you combine the advantages of an n-tier approach with the benefits of using a Web Forms control for data access.

For an example of how to specify a cascading delete, see The Entity Framework and ASP. page that you will be creating, you want to provide a drop-down list of instructors, with names in "last, first" format so that users can select department administrators.

You need to create the relationship and update the data model so that the Entity Framework can automatically handle this relationship.

In the database diagram, right-click the table, and select Relationships.

For testing, you provide a repository object that works with data stored in a way that you can easily manipulate, such as class variables defined as collections.

The following illustration shows the difference between a business-logic class that includes data-access logic without a repository and one that uses a repository.