How To Use Stored Procedure By Getting Database Connection Using DbContext In Repository

Introduction

Using a stored procedure with Entity Framework Core’s DbContext in a repository involves executing the stored procedure and mapping the results to your domain objects. Here’s how you can do it step by step:

Step 1: Define a Model Class

Create a model class to represent the result of your stored procedure. This class should have properties that match the columns returned by the stored procedure.

public class MyStoredProcedureResult
{
    public int Id { get; set; }
    public string Name { get; set; }
    // Add more properties as needed
}

Step 2: Create a Repository Method

In your repository class, create a method that will execute the stored procedure using the DbContext and map the results to your model class.

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

public class MyRepository
{
    private readonly DbContext _dbContext;

    public MyRepository(DbContext dbContext)
    {
        _dbContext = dbContext;
    }

    public List<MyStoredProcedureResult> ExecuteStoredProcedure(int parameterValue)
    {
        var results = new List<MyStoredProcedureResult>();

        using (var connection = _dbContext.Database.GetDbConnection())
        {
            if (connection.State != ConnectionState.Open)
            {
                connection.Open();
            }

            using (var command = connection.CreateCommand())
            {
                command.CommandText = "YourStoredProcedureName";
                command.CommandType = CommandType.StoredProcedure;

                // Add parameters to the command as needed
                var parameter = new SqlParameter("@ParameterName", SqlDbType.Int)
                {
                    Value = parameterValue
                };
                command.Parameters.Add(parameter);

                using (var reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        var result = new MyStoredProcedureResult
                        {
                            Id = reader.GetInt32(reader.GetOrdinal("Id")),
                            Name = reader.GetString(reader.GetOrdinal("Name")),
                            // Map other properties as needed
                        };
                        results.Add(result);
                    }
                }
            }
        }

        return results;
    }
}

Step 3: Use the Repository Method

You can now use the repository method in your application code:

var myRepository = new MyRepository(_dbContext);
var parameterValue = 123; // Set the parameter value
var storedProcedureResults = myRepository.ExecuteStoredProcedure(parameterValue);

// Use the stored procedure results as needed

Please note that this example demonstrates executing a stored procedure and mapping the results manually. If you prefer, you can also use a library like Dapper to simplify the process of executing stored procedures and mapping results.

Additionally, make sure to handle connection management and parameterization properly to ensure secure and efficient execution of the stored procedure.