winforms-sql-connection [GALUA]

TestWins/Form1.cs

@@ -1,43 +1,109 @@
-using System.Drawing.Text;
 using TestWins.Controller;
+using TestWins.Model;
 
 namespace TestWins;
 
 public partial class Form1 : Form
 {
-    //business
-
     private readonly StudentController controller = new StudentController();
+
     public Form1()
     {
         InitializeComponent();
-        loadData();
+
+        try
+        {
+            loadData();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show("Error loading data: " + ex.Message);
+        }
     }
 
     private void loadData()
     {
+        dataGridView1.DataSource = null;
         dataGridView1.DataSource = controller.getAll();
     }
 
     private void btnAdd_Click(object sender, EventArgs e)
     {
+        try
+        {
+            Student s = new Student
+            {
+                Name = txtName.Text,
+                age = int.Parse(txtAge.Text),
+                course = txtCourse.Text
+            };
 
+            controller.createStudent(s);
+            loadData();
+            clearFields();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show("Add failed: " + ex.Message);
+        }
     }
 
     private void btnUpdate_Click(object sender, EventArgs e)
     {
+        try
+        {
+            Student s = new Student
+            {
+                studentId = int.Parse(txtStudentId.Text),
+                Name = txtName.Text,
+                age = int.Parse(txtAge.Text),
+                course = txtCourse.Text
+            };
 
+            controller.update(s);
+            loadData();
+            clearFields();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show("Update failed: " + ex.Message);
+        }
     }
 
     private void btnDelete_Click(object sender, EventArgs e)
     {
+        try
+        {
+            int id = int.Parse(txtStudentId.Text);
+            controller.delete(id);
 
+            loadData();
+            clearFields();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show("Delete failed: " + ex.Message);
+        }
+    }
 
+    private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
+    {
+        if (e.RowIndex >= 0)
+        {
+            DataGridViewRow row = dataGridView1.Rows[e.RowIndex];
 
+            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 dataGridView1_CellClick(object sender, EventArgs e)
+    private void clearFields()
     {
-
+        txtStudentId.Text = "";
+        txtName.Text = "";
+        txtAge.Text = "";
+        txtCourse.Text = "";
     }
-}
+}