Access Stored Procedure With User Defined Data Type Using Entity Framework

Accessing table value type in Entity Framework. This blog shows to access stored procedures in Entity Framework that are using custom table type.

During your professional career, while using Entity Framework, you might face situations where you need to insert multiple data at a time.

Well, we can achieve insertion of multiple data in SQL by creating a custom table type and using it with a stored procedure.

Now, a question raised in your mind is probably "Is it possible to access procedures in Entity Framework that are using custom table type?"

The answer is "YES, It is possible - using EntityFrameworkExtras."

Now, let's have a look at how we can implement. it

Step 1

Create custom data type in your database.

Custom table type

//Custom data type
-- ================================
-- Create User-defined Table Type
-- ================================
--DROP TYPE dbo.Tvp_Employee
CREATE TYPE dbo.Tvp_Employee AS TABLE
(
   Name varchar(50) NULL,
   Salary numeric(18,0) Null
)
GO

Step 2

Create stored procedure using the custom data type you have created recently.

//Create stored procedure
-- =============================================
-- Author: Mitesh Gadhiya
-- Create date: 15-jul-017
-- Description: Demo for Inserting data with Custom table Type
-- =============================================
--DROP PROC Proc_insertemployee
CREATE PROCEDURE Proc_insertemployee (@tbl_Employee TVP_EMPLOYEE readonly)
AS
BEGIN
BEGIN try
-- Insert statements for procedure here
INSERT INTO tbl_employee
(NAME,
salary)
SELECT NAME,
salary
FROM @tbl_Employee
END try
BEGIN catch
DECLARE @ErrorNumber INT
DECLARE @ErrorMessage VARCHAR(2000)
DECLARE @ErrorSeverity INT
DECLARE @ErrorState INT
SELECT @ErrorNumber = Error_number(),
@ErrorMessage = 'Error occured at time of inserting'
+ Error_message(),
@Errorseverity = Error_severity(),
@ErrorState = Error_state()
RAISERROR (@Errormessage,@ErrorSeverity,@ErrorState)
END catch
END
go

Step 3

After creating procedure in your Visual Studio's project, add EntityFrameworkExtras using NuGet Package Manager.



Step 4

After installing nuGet package successfully, add a new class to define Custom data type.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using EntityFrameworkExtras.EF6;
namespace EFCustomDatatype.Entity.CustomDataTypes {
    [UserDefinedTableType("Tvp_Employee")]
    public class Tvp_Employee {
        [UserDefinedTableTypeColumn(1)]
        public string Name {
            get;
            set;
        }
        [UserDefinedTableTypeColumn(2)]
        public decimal Salary {
            get;
            set;
        }
    }
}

Step 5

Add a new class to define procedure that is using custom data type.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using EntityFrameworkExtras.EF6;
using System.Data;
namespace EFCustomDatatype.Entity.CustomDataTypes {
    [StoredProcedure("Proc_insertemployee")]
    public class Proc_insertemployee {
        [StoredProcedureParameter(SqlDbType.Udt, ParameterName = "tbl_Employee")]
        public List < tvp_employee > tbl_Employee {
            get;
            set;
        }
    }
}

Step 6

Call procedure from Controller and insert data into database.



Code snippet for calling store procedure from application.

using EFCustomDatatype.Entity.CustomDataTypes;
using EntityFrameworkExtras.EF6;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace EFCustomDatatype.Controllers {
    public class EFCustomDatatypeController: Controller {
        Entity.EFCustomDatatypeEntities objEFCustomDatatype;
        public EFCustomDatatypeController() {
            objEFCustomDatatype = new Entity.EFCustomDatatypeEntities();
        }
        // GET: EFCustomDatatype
        public ActionResult Index() {
            try {
                var procedure = new Proc_insertemployee() {
                    tbl_Employee = GetEmpData()
                };
                objEFCustomDatatype.Database.ExecuteStoredProcedure(procedure);
            } catch (Exception) {
                throw;
            }
            return View();
        }
        public List < tvp_employee > GetEmpData() {
            List < tvp_employee > lstEmp = new List < tvp_employee > ();
            for (int i = 0; i < 5; i++) {
                lstEmp.Add(new Tvp_Employee {
                    Name = "Mitesh_" + i.ToString(),
                        Salary = (1000 * (i + 1))
                });
            }
            return lstEmp;
        }
    }
}

And we are done..!

Cheers...Hope this will be helpful to you..:)