Microsoft ADO.NET Entity Framework Step by Step by John Paul Mueller PDF

By John Paul Mueller

ISBN-10: 0735664161

ISBN-13: 9780735664166

Extend your services - and educate your self the basics of the Microsoft ADO.NET Entity Framework five. when you've got prior programming event yet are new to the Entity Framework, this educational can provide the step by step suggestions and coding workouts you must grasp middle themes and strategies.

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Extra resources for Microsoft ADO.NET Entity Framework Step by Step

Sample text

Viewing the differences will add to your knowledge of how the Entity Framework interacts with the database and generates XML to model it. 26 PArT I Introducing the Entity Framework Chapter 1 quick reference To Do this See how the application views the database Open the CSDL or EDMX file and view its content See how the database manager views the database Open the SSDL or EDMX file and view its content Determine how the Entity Framework resolves differences between the application view and the database manager view of the database Open the MSL or EDMX file and view its content Create a new conceptual model Click Add New Data Source in the Data Source window and choose Empty Model when prompted.

The database contains all of the data, but a view looks at the data in a particular way. In the same way, a derived entity would help you create applications that view a particular entity type within the set of entities. The final piece of information you need to know for now about entities concerns the entity container. In order to provide a convenient means to hold all of the entity information together, the Entity Framework employs the entity container. Before you can interact with an entity, your application creates an entity container instance.

Within the container is a table named Customers. The Count() method outputs the number of records in the specified table 4. Double-click Add and add the following code to the resulting event handler: private void btnAdd_Click(object sender, EventArgs e) { // Create a new record. Create(); // Add some random data. ToString(); // Add a new record. SaveChanges(); // Inform the user. ToString()); } The example begins by creating a new Customer record, ThisCustomer It then fills the fields with random numeric values.

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Microsoft ADO.NET Entity Framework Step by Step by John Paul Mueller

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