a little work

ProjectGarage/Forms/FormDriver.Designer.cs

@@ -106,6 +106,7 @@
             buttonSaveDriver.TabIndex = 8;
             buttonSaveDriver.Text = "Сохранить";
             buttonSaveDriver.UseVisualStyleBackColor = true;
+            buttonSaveDriver.Click += ButtonSaveDriver_Click;
             // 
             // buttonCancelDriver
             // 
@@ -115,9 +116,11 @@
             buttonCancelDriver.TabIndex = 9;
             buttonCancelDriver.Text = "Отмена";
             buttonCancelDriver.UseVisualStyleBackColor = true;
+            buttonCancelDriver.Click += ButtonCancelDriver_Click;
             // 
             // comboBoxTruckID
             // 
+            comboBoxTruckID.DropDownStyle = ComboBoxStyle.DropDownList;
             comboBoxTruckID.FormattingEnabled = true;
             comboBoxTruckID.Location = new Point(120, 156);
             comboBoxTruckID.Name = "comboBoxTruckID";

ProjectGarage/Forms/FormDriver.cs

@@ -1,4 +1,7 @@
-using System;
+using ProjectGarage.Entities;
+using ProjectGarage.Entities.Enums;
+using ProjectGarage.Repositories;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
@@ -12,9 +15,77 @@ namespace ProjectGarage.Forms
 {
     public partial class FormDriver : Form
     {
-        public FormDriver()
+        private readonly IDriverRepository _driverRepository;
+        private int? _driverId;
+
+        public int Id
+        {
+            set
+            {
+                try
+                {
+
+                    var driver = _driverRepository.ReadDriverByID(value);
+                    if (driver == null)
+                    {
+                        throw new
+                        InvalidDataException(nameof(driver));
+                    }
+                    textBoxFirstName.Text = driver.First_name;
+                    textBoxLastName.Text = driver.Last_name;
+                    comboBoxTruckID.SelectedItem = driver.Id;//TODO НЕ ЗАБУДЬ
+                    _driverId = value;
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(ex.Message, "Ошибка при получении данных", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+                }
+            }
+        }
+
+        public FormDriver(IDriverRepository driverRepository)
         {
             InitializeComponent();
+            _driverRepository = driverRepository ?? throw new ArgumentNullException(nameof(driverRepository));
+            comboBoxTruckID.DataSource = Enum.GetValues(typeof(FuelType));//TODO НЕ ЗАБУДЬ
+
+        }
+
+        private void ButtonSaveDriver_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (string.IsNullOrWhiteSpace(textBoxFirstName.Text) || string.IsNullOrWhiteSpace(textBoxLastName.Text)
+                || comboBoxTruckID.SelectedIndex < 1)//TODO НЕ ЗАБУДЬ
+                {
+                    throw new Exception("Имеются незаполненные поля");
+                }
+                if (_driverId.HasValue)
+                {
+                    _driverRepository.UpdateDriver(CreateDriver(_driverId.Value));
+                }
+                else
+                {
+                    _driverRepository.CreateDriver(CreateDriver(0));
+                }
+                Close();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при сохранении",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
         }
+    
+
+        private void ButtonCancelDriver_Click(object sender, EventArgs e)
+        {
+
+        }
+
+        private Driver CreateDriver(int id) => Driver.CreateDriver(id, textBoxFirstName.Text, 
+            textBoxLastName.Text, textBoxPhoneNum.Text, (int)(FuelType)comboBoxTruckID.SelectedItem!);//TODO НЕ ЗАБУДЬ
+    }
+
 }

ProjectGarage/Forms/FormTruck.cs

@@ -1,14 +1,5 @@
 using ProjectGarage.Entities;
 using ProjectGarage.Repositories;
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Forms;
 
 namespace ProjectGarage.Forms
 {