How can I get return values and output values from a stored procedure with EF core?

Posted on by David Darling

How can I get return values and output values from a stored procedure with EF core?

Get a SQL Server stored procedure return value with EF Core

  1. var parameterReturn = new SqlParameter { ParameterName = “ReturnValue”, SqlDbType = System.Data.SqlDbType.Int, Direction = System. Data.
  2. var result = db.
  3. var procs = new NorthwindContextProcedures(db); var returned = new OutputParameter(); await procs.

What is output parameter in stored procedure?

Output parameter is a parameter whose value is passed out of the stored procedure/function module, back to the calling PL/SQL block. An OUT parameter must be a variable, not a constant. It can be found only on the left-hand side of an assignment in the module.

How do I map a stored procedure in Entity Framework?

Map the Person Entity to Stored Procedures

  1. Right-click the Person entity type and select Stored Procedure Mapping.
  2. The stored procedure mappings appear in the Mapping Details window.
  3. Click .
  4. Default mappings between stored procedure parameters and entity properties appear.

How do I update a stored procedure in Entity Framework?

To refresh an existing stored procedure in edmx file,

  1. Go to “Model Browser” > “Function Imports” > find the desired stored procedure class > right click and click on “Edit”
  2. In “Edit Function Import” form, in “Returns a Collection Of” section, click on “Update” button.
  3. Click “OK” to finish the refresh.

How do you declare an output parameter?

Creating output parameters

  1. parameter_name data_type OUTPUT.
  2. CREATE PROCEDURE uspFindProductByModel ( @model_year SMALLINT, @product_count INT OUTPUT ) AS BEGIN SELECT product_name, list_price FROM production.products WHERE model_year = @model_year; SELECT @product_count = @@ROWCOUNT; END;
  3. @product_count INT OUTPUT.

How do you call a stored procedure with parameters in SQL?

Expand the database that you want, expand Programmability, and then expand Stored Procedures. Right-click the user-defined stored procedure that you want and select Execute Stored Procedure. In the Execute Procedure dialog box, specify a value for each parameter and whether it should pass a null value.

How do stored procedures work in Entity Framework?

The following is the procedure to import and use a Stored Procedure in Entity Framework.

  1. Step 1: Import Stored Procedure.
  2. Step 2: Right-click Stored Procedure and select “Add Function Import”.
  3. Step 3: Here, we can map a returned object of our Stored Procedure.

How do you pass an output parameter to a stored procedure in SQL Server?

How to add stored procedure in Entity Framework?

To add, right-click the DataModel folder and go to Add -> New Item. A dialog window will open. Select “Data” option on the left side of the dialog window and select “Ado.Net Entity Data Model”. Finally, click OK. Now, we have to import the stored procedure into Entity Framework. Stored procedure in Entity Framework is called a function.

How do I search for a stored procedure?

In Model Browser, usually on the left, paste the name of your stored procedure into the search box, click enter (or search). It will land on the first instance – probably the stored procedure itself.

How do I add a stored procedure to my model?

In that case, your steps are: This creates an entry for the stored procedure in your physical storage model. Next: go to the Model Browser (see the above context menu? It’s just below Update Model from Database ), navigate to the Storage Model and find your procedure

How do I update a stored procedure?

Look for the function import for your stored procedure and double click it. The same window you used to create it will open, but now populated with its data. Click the Get Column Information button (look at the grid below the button to see what will be changed). Click the Update button next to the “Complex” radio button choice.