winforms-sql-connection [PIOL]

TestWins/Form1.cs

@@ -1,13 +1,10 @@
 using System.Drawing.Text;
 using TestWins.Controller;
-
 namespace TestWins;
-
 public partial class Form1 : Form
 {
-    //business
-
     private readonly StudentController controller = new StudentController();
+
     public Form1()
     {
         InitializeComponent();
@@ -21,23 +18,56 @@ private void loadData()
 
     private void btnAdd_Click(object sender, EventArgs e)
     {
-
+        var student = new TestWins.Model.Student
+        {
+            studentId = txtStudentId.Text,
+            Name = txtName.Text,
+            age = int.Parse(txtAge.Text),
+            course = txtCourse.Text
+        };
+        controller.createStudent(student);
+        loadData();
+        clearFields();
     }
 
     private void btnUpdate_Click(object sender, EventArgs e)
     {
-
+        var student = new TestWins.Model.Student
+        {
+            studentId = txtStudentId.Text,
+            Name = txtName.Text,
+            age = int.Parse(txtAge.Text),
+            course = txtCourse.Text
+        };
+        controller.update(student);
+        loadData();
+        clearFields();
     }
 
     private void btnDelete_Click(object sender, EventArgs e)
     {
-
-
-
+        controller.delete(txtStudentId.Text);
+        loadData();
+        clearFields();
     }
 
     private void dataGridView1_CellClick(object sender, EventArgs e)
     {
+        if (dataGridView1.CurrentRow != null)
+        {
+            DataGridViewRow row = dataGridView1.CurrentRow;
+            txtStudentId.Text = row.Cells[0].Value.ToString();
+            txtName.Text = row.Cells[1].Value.ToString();
+            txtAge.Text = row.Cells[2].Value.ToString();
+            txtCourse.Text = row.Cells[3].Value.ToString();
+        }
+    }
 
+    private void clearFields()
+    {
+        txtStudentId.Text = "";
+        txtName.Text = "";
+        txtAge.Text = "";
+        txtCourse.Text = "";
     }
 }

TestWins/model/ConnectionSql.cs

@@ -3,20 +3,23 @@ namespace TestWins.Model;
 //dotnet add package MySql.Data
 using MySql.Data.MySqlClient;
 
-public class ConnectionSql
-{
-    private readonly string _connectionString = "server=localhost;database=student;uid=root;pwd=root";
-        private MySqlConnection _conn;
-
-    public MySqlConnection connectSql()
+    public class ConnectionSql
     {
+        private readonly string _connectionString = "server=localhost;database=student;uid=root;pwd=root;";
+        private MySqlConnection _conn;
 
-        Console.WriteLine("Connecting to DB");
+        public MySqlConnection connectSql()
+        {
+            Console.WriteLine("Connecting to DB");
 
-        _conn = new MySqlConnection(_connectionString);
+            _conn = new MySqlConnection(_connectionString);
+            _conn.Open();
 
-        Console.WriteLine(_conn == null ? "Datbase Connection Failed" : "Database connection successful");
+            Console.WriteLine(_conn.State == System.Data.ConnectionState.Open
+                ? "Database connection successful"
+                : "Database Connection Failed");
 
-        return _conn;
+            return _conn;
+        }
     }
-}
+