first commit

sql2/Repositories/CourseRepo.cs

@@ -0,0 +1,57 @@
+using MySql.Data.MySqlClient;
+using PaymentLogs.Domain;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PaymentLogs.Repositories
+{
+    internal class CourseRepo : Repo<int, Course>
+    {
+
+        public override void Load()
+        {
+            DataBase db = new DataBase();
+            db.openConnection();
+            _data.Clear();
+            string sql = " SELECT * FROM courses  ";
+            MySqlCommand cmd = new MySqlCommand(sql, db.getConnection());
+            MySqlDataReader reader = cmd.ExecuteReader();
+
+            while (reader.Read())
+            {
+                Course course = new Course() { 
+                    Id = reader.GetInt32("id"), 
+                    Name = reader.GetString("name"),
+                    Type = reader.GetString("type"),
+                    Cost = reader.GetInt32("cost"),
+                    Duration = reader.GetInt32("duration"),
+                    StudentsCount = reader.GetInt32("students_count")
+                };
+                _data[course.Id] = course;
+            }
+            db.closeConnection();
+        }
+
+
+        public override void Save()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Course ByName(string name)
+        {
+            foreach (var course in _data.Values)
+            {
+                if (course.Name.ToLower().Equals(name.ToLower()))
+                {
+                    return course;
+                }
+            }
+            return _data.Values.FirstOrDefault();
+        }
+    }
+}