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This article mainly explains "how to join the ADO.NET file project", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "how to join the ADO.NET file project" bar!

These three stored procedures need to be mapped to the entity class at the same time, that is to say, if you map the stored procedure for the insertion method of an entity class, then updates and deletes must also map the stored procedure, our three stored procedures all operate on the User table, so select the UserInfo entity class and set it in the Mapping details Mapping entity to functions tab.

Add an ADO.NET Entity Data Model file to the project, choose to generate the model from the database, and hook up the tables and stored procedures when selecting database objects, so as to complete the generation of the entity data model.

But if you use ADO.NET Framework to CRUD data at this time and do not use stored procedures, we ADO.NET Entity Data Model need to map stored procedures. Queries are mapped differently from the other three operations, which we discuss separately.

Let's start with the import of query stored procedures. Right-click function Import in the Model browser and select create function Import.

In the pop-up dialog box, set to select a stored procedure name for the query, ADO.NET Entity Data Model sets the name of the function that will be used to call the method later, and sets the return type of the method.

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