winforms-sql-connection[BALBUENA]

TestWins/Form1.cs

@@ -1,13 +1,11 @@
-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 +19,46 @@ private void loadData()
 
     private void btnAdd_Click(object sender, EventArgs e)
     {
-
+        controller.add(txtName.Text, txtCourse.Text);
+        loadData();
+        clearFields();
     }
 
     private void btnUpdate_Click(object sender, EventArgs e)
     {
-
+        int id = int.Parse(txtId.Text);
+        controller.update(id, txtName.Text, txtCourse.Text);
+        loadData();
+        clearFields();
     }
 
+
     private void btnDelete_Click(object sender, EventArgs e)
     {
+        int id = int.Parse(txtId.Text);
+        controller.delete(id);
+        loadData();
+        clearFields();
+    }
 
+
+    private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
+    {
+        if (e.RowIndex >= 0)
+        {
+            DataGridViewRow row = dataGridView1.Rows[e.RowIndex];
 
-
+            txtId.Text = row.Cells["id"].Value.ToString();
+            txtName.Text = row.Cells["name"].Value.ToString();
+            txtCourse.Text = row.Cells["course"].Value.ToString();
+        }
     }
 
-    private void dataGridView1_CellClick(object sender, EventArgs e)
+
+    private void clearFields()
     {
-
+        txtId.Clear();
+        txtName.Clear();
+        txtCourse.Clear();
     }
 }

TestWins/model/ConnectionSql.cs

@@ -1,22 +1,28 @@
-namespace TestWins.Model;
-
-//dotnet add package MySql.Data
 using MySql.Data.MySqlClient;
 
-public class ConnectionSql
+namespace TestWins.Model
 {
-    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");
-
-        _conn = new MySqlConnection(_connectionString);
+        public MySqlConnection ConnectSql()
+        {
+            try
+            {
+                Console.WriteLine("Connecting to DB...");
 
-        Console.WriteLine(_conn == null ? "Datbase Connection Failed" : "Database connection successful");
+                _conn = new MySqlConnection(_connectionString);
+                _conn.Open(); // 
+                Console.WriteLine("Database connection successful");
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Database connection failed: " + ex.Message);
+            }
 
-        return _conn;
+            return _conn;
+        }
     }
-}
+}