如何在 ASP.NET Core 3.0 的存储过程中添加参数

Question

I have this stored procedure:

CREATE PROCEDURE AddReserv
    @Place int,
    @StartDate datetime,
    @EndDate datetime
AS
BEGIN
    INSERT INTO [dbo].Reserv(UserId, Place,  StartDate, EndDate)
    VALUES (1, @Place, @StartDate, @EndDate)
END

From the controller in the post method, I want to add a new record to the table. I can't figure out how to pass parameters to the stored procedure.

My code in the controller:

// POST: api/CreateReserv
[HttpPost]
public void Post(string value)
{
    using (var connection = _db.Database.GetDbConnection())
    {
        connection.Open();

        using (var command = connection.CreateCommand())
        {
            command.CommandType = System.Data.CommandType.StoredProcedure;
            command.CommandText = "AddReserv";

            //How to add params?
            /*
                    @Place int
                    @StartDate datetime
                    @EndDate datetime
            */

            command.ExecuteNonQuery();
        }
    }
}

Answer 1

You can add parameter using command.Parameters.Add like below.

Please make sure you have installed NuGet package System.Data.SqlClient .

using (var command = connection.CreateCommand())
{
    command.CommandType = System.Data.CommandType.StoredProcedure;
    command.CommandText = "AddReserv";
    
    command.Parameters.Add("@Place", SqlDbType.Int).Value = place;
    command.Parameters.Add("@StartDate", SqlDbType.DateTime).Value = startDate;
    command.Parameters.Add("@EndDate", SqlDbType.DateTime).Value = endDate;
    
    command.ExecuteNonQuery();     
}

Answer 2

Updated my answer with some of @Karan's code (which should be the correct answer)

....

  using var connection = _db.Database.GetDbConnection();
  connection.Open();

  using var command = new SqlCommand("AddReserv", connection)
  {
    CommandType = CommandType.StoredProcedure
  };

  command.Parameters.Add("@Place", SqlDbType.Int).Value = place;
  command.Parameters.Add("@StartDate", SqlDbType.DateTime).Value = startDate;
  command.Parameters.Add("@EndDate", SqlDbType.DateTime).Value = endDate;
  
  command.ExecuteNonQuery();

Further improvement will be to use an async version of the code. Note: When your code is more finished, don't forget [FromBody] if posting JSON (more info about this here: https://stackoverflow.com/a/63349923/14072498 ).

[HttpPost]
public async Task<IActionResult> Post(string value)
{
  await using var connection = _db.Database.GetDbConnection();
  await connection.OpenAsync();

  await using var command = new SqlCommand("AddReserv", connection)
  {
    CommandType = CommandType.StoredProcedure
  };

  command.Parameters.Add("@Place", SqlDbType.Int).Value = place;
  command.Parameters.Add("@StartDate", SqlDbType.DateTime).Value = startDate;
  command.Parameters.Add("@EndDate", SqlDbType.DateTime).Value = endDate;

  await command.ExecuteNonQueryAsync();

  ....
}

Not sure what type _db is, if

_db.Database.GetDbConnection()

has an async version, use that as well.