Add Authentication to Web API

Question

I need to add authentication to my Web API, so user must add token, or password to access the Web API.

 

Under Controller folder i have :

 

[AcceptVerbs("GET")]

public Reservation RPCStyleMethodFetchFirstEmployees()

{

return listEmp.FirstOrDefault();

}

// Get All Reservations

[HttpGet]

[ActionName("GetReservation")]

//public Reservation Get()

public List<Reservation> Get()

{

string source = System.Configuration.ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;

SqlConnection conn = new SqlConnection(source);

SqlCommand cmd = new SqlCommand();

SqlDataReader reader;

string sql = "Select s.Id,a.Room_No ,s.Room_Description,s.Room_Capacity, b.Description, s.Location,s.Start_Date,s.Start_Time,CONVERT(VARCHAR(20),CONVERT(Varchar(50),( Concat(CONVERT(VARCHAR, s.Start_Date, 126),'T',CONVERT(VARCHAR, s.End_Time, 127)) ),105),131)+'.00Z',s.End_Time,s.Meeting_Title,s.Reservation_Reason, s.Status,s.Attendance,s.Remarks,s.Mail_To,s.Mail_CC, s.Created_User, s.Created_Password, s.Created_Access_Key from Reservation s , Rooms a, Room_Type b Where s.Room_No = a.ID And s.Room_Type = b.ID";

cmd.CommandText = sql;

cmd.CommandType = CommandType.Text;

cmd.Connection = conn;

Reservation emp = null;

conn.Open();

reader = cmd.ExecuteReader();

List<Reservation> emps = new List<Reservation>();

while (reader.Read())

{

//read data

emp = new Reservation();

emp.Id = Convert.ToInt32(reader.GetValue(0));

emp.Room_No = reader.GetValue(1).ToString();

emp.Room_Description = reader.GetValue(2) as string;//reader.GetValue(3).ToString();

emp.Room_Capacity = (reader.GetValue(3) as int?) ?? 0; //Convert.ToInt32(reader.GetValue(4));

emp.Room_Type = reader.GetValue(4) as string;//reader.GetValue(5).ToString();

emp.Location = reader.GetValue(5) as string; //reader.GetValue(6).ToString();

//emp.Start_Date = reader.GetValue(6) as string; //reader.GetValue(7).ToString();

emp.Start_Date = reader.GetValue(6).ToString();

emp.Start_Time = reader.GetValue(7).ToString();

emp.Start_Date_Time = reader.GetValue(8).ToString();

emp.End_Time = reader.GetValue(9).ToString();

emp.Meeting_Title = reader.GetValue(10) as string; //reader.GetValue(10).ToString();

emp.Reservation_Reason = reader.GetValue(11) as string; //reader.GetValue(11).ToString();

emp.Status = reader.GetValue(12) as string; //reader.GetValue(12).ToString();

emp.Attendance = (reader.GetValue(13) as int?) ?? 0;//Convert.ToInt32(reader.GetValue(13));

emp.Remarks = reader.GetValue(14) as string;//reader.GetValue(14).ToString();

emp.Mail_To = reader.GetValue(15) as string;//reader.GetValue(15).ToString();

emp.Mail_CC = reader.GetValue(16) as string;//reader.GetValue(16).ToString();

emp.Created_User = reader.GetValue(17) as string;//reader.GetValue(16).ToString();

emp.Created_Password = reader.GetValue(18) as string;//reader.GetValue(16).ToString();

emp.Created_Access_Key = reader.GetValue(19) as string;//reader.GetValue(16).ToString();

emps.Add(emp);

}

conn.Close();

return emps;

}

and under Models i have  

public class Reservation

{

public int Id { get; set; }

public string Room_No { get; set; }

public string Room_Description { get; set; }

public int Room_Capacity { get; set; }

public string Room_Type { get; set; }

public string Location { get; set; }

public string Start_Date { get; set; }

public string Start_Time { get; set; }

public string Start_Date_Time { get; set; }

public string End_Time { get; set; }

public string Meeting_Title { get; set; }

public string Reservation_Reason { get; set; }

public string Status { get; set; }

public int Attendance { get; set; }

public string Remarks { get; set; }

public string Mail_To { get; set; }

public string Mail_CC { get; set; }

public string Created_User { get; set; }

public string Created_Password { get; set; }

public string Created_Access_Key { get; set; }

// public string FirstName { get; set; }

// public string LastName { get; set; }

// public string Department { get; set; }

//}

}

 

How to add Authentication before they start get the data