ASP.Net Core: Display Stored Procedure result using Entity Framework

anjali60...

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User: anjali600
Posted: on Sep 30, 2023 12:01 AM
Forum: ASP.Net Core MVC
Answer: 1
Views: 2114

I have the following database tables:

Employee table -Database name Employee - EmployeeID is the primary key

JobTitleID    EmployeeNumber   SectionID    EmployeeId 
9               1234          2              1
2               8976          3              2
4               7654          1              3

I have another table called Job Title --Database name Employee - prmary key JobTitleID

JobTitleID    JobTitle
9               CEO
2               Developer
4               Executive

Section Table - Database name Employee- prmary key SectionID

SectionID        Section
1               manager
2               IT
3               Branch

Another table called tblEmployee that reside in another database name - Tracking - primary Key EmployeeNumber

EmployeeNumber       EmployeeName
1234                 TestEmpName1
8976                 TestEmpName2
7654                 TestEmpName3

I am using database first approach to create the context class. I need this data to populate a table in the Razor view. How can I get the EmployeeName, JobTitle, section in a LINQ query and then populate a List with this data. I tried writing a stored procedure called GetEmployeeData like this:

SELECT JobTitleID, EmployeeNumber, SectionID, JobTitle, section, EmployeeName
FROM Employee e LEFT OUTER JOIN JOBTitle j ON e.JobTitleID = j.JobTitleID
LEFT OUTER JOIN SECTION s ON e.SectionID  = s.SectionID 
LEFT OUTER JOIN  Tracking.dbo.tblEmployee t ON t.EmployeeNumber = e.EmployeeNumber

I need to populate a List with this data and then populate a table in razor view. I can go with LINQ or SQL stored procedure.

I tried doing this, but didn't work because sql query is returning JobTitle, section and emmployeeName in the sql query and that does not exists in Employee Model.

List<Employee> query = await _empContext.Set<Employee>().FromSqlRaw($"EXECUTE dbo.GetEmployeeData").ToListAsync();

I need JobTitle Section EmployeeName in a table in view.

public partial class Employee
{   
     [Key]
     public int EmployeeId{ get; set; }
     public int JobTitleId { get; set; }
     public string EmployeeNumber { get; set; }
     public int? SectionId { get; set; }
     public virtual JobTitle? JobTitle { get; set; }
     public virtual Section? Section { get; set; }
}

public partial class JobTitle
{
    public int JobTitleId { get; set; }
    public string JobTitle { get; set; } = null!;
    public virtual ICollection<Employee> Employees{ get; set; } = new List<Employee>();
}

public partial class Section
{    
    public int SectionId { get; set; }
    public string Section { get; set; } = null!;
    public virtual List<Employee> Employees { get;  } = new List<Employee>();
    public virtual ICollection<Section> Section { get; } = new List<Section>();
}

This is my partial context class. I cannot post the entire context class because I have some other columns names then can display the company Name:

public partial class EmployeeContext : DbContext
{
    public EmployeeContext()
    {
    }

    public EmployeeContext(DbContextOptions<EmployeeContext> options)
        : base(options)
    {
    }
    public virtual DbSet<JobTitle> JobTitle { get; set; }
    public virtual DbSet<Section> Section { get; set; } 
    public virtual DbSet<Employee> Employees { get; set; }
}

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dharmend...

1 3

Reply
ANSWER
User: dharmendr
Replied: on Sep 30, 2023 03:37 AM
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Hi anjali600,

You need to add another class with the Columns returning from the Procedure.

Then use that class to call and return the result.

Refer below example.

Database

For this example I have used of Northwind database that you can download using the link given below.

Download Northwind Database

Stored Procedure

-- EXEC Customers_SearchOrders ''
CREATE PROCEDURE Customers_SearchOrders
    @ContactName NVARCHAR(30)
AS
BEGIN
    SET NOCOUNT ON;
    SELECT TOP 10 o.OrderID
		  ,c.ContactName
		  ,o.Freight
		  ,o.ShipName
    FROM Orders o
	INNER JOIN Customers c ON o.CustomerID = c.CustomerID
    WHERE c.ContactName LIKE '%' + @ContactName + '%'
	ORDER BY o.OrderID
END

Model

Customer

public class Customer
{
    public string CustomerID { get; set; }
    public string ContactName { get; set; }
    public string City { get; set; }
    public string Country { get; set; }
}

Order

public class Order
{
    public int OrderID { get; set; }
    public string CustomerID { get; set; }
    public decimal Freight { get; set; }
    public string ShipName { get; set; }
}

CustomerOrder

public class CustomerOrder
{
    [System.ComponentModel.DataAnnotations.Key]
    public int OrderID { get; set; }
    public string ContactName { get; set; }
    public decimal Freight { get; set; }
    public string ShipName { get; set; }
}

DbContext

public class DBCtx : DbContext
{
    public DBCtx(DbContextOptions<DBCtx> options) : base(options)
    {
    }

    public DbSet<Customer> Customers { get; set; }

    public DbSet<Order> Orders { get; set; }

    public DbSet<CustomerOrder> CustomerOrders { get; set; }
}

Namespaces

using System.Collections.Generic;
using System.Data.SqlClient;
using Microsoft.EntityFrameworkCore;
using System.Threading.Tasks;

Controller

public class HomeController : Controller
{
    private DBCtx Context { get; }
    public HomeController(DBCtx _context)
    {
        this.Context = _context;
    }

    public async Task<IActionResult> Index()
    {
        List<CustomerOrder> orders = await Task.Run(() => this.SearchOrders(""));
        return View(orders);
    }

    [HttpPost]
    public async Task<IActionResult> Index(string customerName)
    {
        List<CustomerOrder> orders = await Task.Run(() => this.SearchOrders(customerName));
        return View(orders);
    }

    public async Task<List<CustomerOrder>> SearchOrders(string contactName)
    {
        SqlParameter pContactName = new SqlParameter("@ContactName", contactName);
        List<CustomerOrder> orders = await this.Context.Set<CustomerOrder>()
                                .FromSql("EXECUTE Customers_SearchOrders @ContactName", pContactName).ToListAsync();

        return orders;
    }
}

View

@using Search_EF_MVC_Core.Models;
@addTagHelper*, Microsoft.AspNetCore.Mvc.TagHelpers

@model List<CustomerOrder>
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <form method="post" asp-controller="Home" asp-action="Index">
        <span>Customer Name:</span> 
        <input type="text" name="CustomerName" />
        <input type="submit" value="Search" />
        <br />
        <br />
        <table cellpadding="0" cellspacing="0">
            <tr>
                <th>Order ID</th>
                <th>Customer Name</th>
                <th>Ship Name</th>
                <th>Freight</th>
            </tr>
            @foreach (CustomerOrder order in Model)
            {
                <tr>
                    <td>@order.OrderID</td>
                    <td>@order.ContactName.Trim()</td>
                    <td>@order.ShipName.Trim()</td>
                    <td style="text-align:right">@order.Freight.ToString("N2")</td>
                </tr>
            }
        </table>
    </form>
</body>
</html>

Screenshot

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ASP.Net Core: Display Stored Procedure result using Entity Framework

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