Execute stored procedure entity framework code first. Stored Procedures In Entity Framework 6 In MVC 5 2019-02-27

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.NET MVC: Using Stored Procedure in Entity Framework

execute stored procedure entity framework code first

Until the very clever people at Microsoft add stored procedure support to Code First Entity Framework 4. So just enter the following command in the Package Manager Console, Update-Database Step 5 You can also check out the Stored Procedure from the Server Explorer. It will result in an error if more than one record is returned. Working with Stored Procedures If we want to work with the Stored Procedure then we need to use the Code First Migrations that is very safe, smooth and productive. All database accessing methods like Create , Edit , Delete are defined automatically in this controller class. In our case, stored procedure will return collection of Course entity. The following example maps the Student entity with the default stored procedures.

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Executing Stored Procedure using Entity Framework DataContext

execute stored procedure entity framework code first

The following script help to generate the table with test data and a Stored Procedure. But unlike FromSql method, it returns the number of affected rows. If your stored procedure returns more than one instance of the same result set, the ToList method will return the first result set. Value ; Happy Programming : What do you think? To use, simply give the table valued parameter a list or array of the underlying class type. The ToList accessor method in the Result Set object will search for the result set containing objects of that particular type and return the first one found, casting it to a List of the correct type. You enable this feature as part of the migration configuration by using the MapToStoredProcedures method.

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How to execute a Stored Procedure with Entity Framework Code First

execute stored procedure entity framework code first

We can use that class to specify a different naming convention. Alternatively, you can also execute stored procedure using SqlQuery method. And it will return the number of rows affected. ToList ; Please note that with above method we can only return entities that are defined for code first and you cannot return a custom entity like above methods. The following example maps custom stored procedures with the Student entity. It might return only a subset of the data required for an entity or it might return a scalar value.

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How to call a Stored Procedure in Code First Entity Framework 6

execute stored procedure entity framework code first

SqlQuery method to execute the stored procedure, which will result in the retrieved entities being tracked by the context unless you turn tracking off. The CallStoredProc routine will only save result sets for which a type was specified in the method call. SetValue t, data, null ; with SetValue t, p. When you are viewing the list of movies, do not close the browser and switch to your Visual Studio. You can also configure parameters mapping with entity properties. Step 3: Here, we can map a returned object of our Stored Procedure. In these cases there is no DbSet to call the SqlQuery method on, so you call the version of the SqlQuery method found on the Database property of the DbContext class instead, which is a generic method.

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Dan Wahlin

execute stored procedure entity framework code first

Update One of the best things about blogs, twitter, etc. Just proceed to the next section to use this. This forces execution of the query, which results in the employee variable representing an instance of the Employee type. This Stored Procedure returns nothing. I would like to hear your thoughts, suggestions, and questions in the section below. This may be useful if we want to use the object inserted for further operations. I assume you have created an Asp.

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Code First Stored Procedures

execute stored procedure entity framework code first

ToList ; foreach Course cs in courseList Console. To process the return code, we could create a parameters class and decorate the property with the Direction attribute and give it the value ParameterDirection. We can set custom options for this process, including in this case mapping to stored procedures. That was the whole point of our endeavor. One more feature is that it only works for those applications that use the Code First Approach; that is, we first create the structure of the class and next accomplish the application and the database is created when running the application. I found the article mentioned above and tweaked a few things. Add function import: Now in this step, we will import a function for the stored procedure.

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Stored Procedure Mapping in EF 6 Code

execute stored procedure entity framework code first

SetValue inputObject, propertyVal, null ; } private static bool IsNullableType Type type { return type. In this case, we're expecting one return set so we provide one type object. Thanx I had the same question several weeks ago and updated my answer with the solution I wound up using. ToList ; return empSummary; } public virtual int UpdateEmployee int EmployeeId, string FirstName, string LastName { return Database. The returned data is matched by default between the column name in the result set and the property name in the destination class object. A Big Thank You I realize that this is a long time after this article was posted, but I just wanted to a say a big, big thank you for this!!! Stored Procedure as Entity Function The Entity Framework has the capability of importing a Stored Procedure as a function. UseSqlServer connection ; } So how do we run those stored procedures? The 'Readonly' modifier on the parameter is required.

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Execute Stored Procedure using DBContext

execute stored procedure entity framework code first

WriteLine s ; }; Please modify it as per your experience. ToList ; Acknowledgements Thanks and acknowledgements to everyone from whom I've learned these techniques, all those bloggers who took the time to post tips that have helped my knowledge, and with a special mention to StackOverflow, without which this could not exist. Introduction In this article, I will demonstrate how to call a Stored Procedure from Entity Framework. Maybe the entity needs to be written to the database, and then a result set based on that entity needs to be written to a different table. ToList ; foreach Course cs in courseList Console.

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Code

execute stored procedure entity framework code first

Configuration InitialEntities The add migration command generates a Dbmigration class. We have to use same method to execute database Stored Procedure. There are many ways to call Stored Procedures from Entity Framework. The following code can be used to send output to the console. There are total 3 parameters and the last one is the output parameter here.

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Code

execute stored procedure entity framework code first

His blog posts on user experience design can be found at. EntitiesContext -MigrationsDirectory:EntitiesMigrations Step 2 Add Migration Configuration Add-Migration -configuration CodeFirstStoredProcedure. You always write great stuff though so I could have just cut-and-paste from your blog. In the Model Browser that appears on the Designer's left, you can see two stored procedures I selected while running the wizard. It it is not available in the packages. This project provides routines that can call stored procedures and will properly handle input and output parameters, return codes and multiple result sets. Step 3 - Build the solution.

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