RetrieveAddress helper method

C969Project/AddUpdateCustomerForm.cs

@@ -1,14 +1,18 @@
+using C969Project.Data.Models;
+
 namespace C969Project;
 
 public partial class AddUpdateCustomerForm : Form
 {
     public enum OperationType { Add, Update }
-    public AddUpdateCustomerForm(OperationType operationType)
+    public AddUpdateCustomerForm(OperationType operationType, Customer? customer = null)
     {
         InitializeComponent();
 
         if (operationType == OperationType.Add) InitAdd();
-        else if (operationType == OperationType.Update) InitUpdate();
+        else if (operationType == OperationType.Update && customer is not null) InitUpdate(customer);
+        else Close();
+
     }
 
     private void InitAdd()
@@ -17,10 +21,12 @@ public partial class AddUpdateCustomerForm : Form
         label1.Text = "Add Customer";
     }
 
-    private void InitUpdate()
+    private void InitUpdate(Customer customer)
     {
         Text = "Update Customer";
         label1.Text = "Update Customer";
+
+        nameTextBox.Text = customer.CustomerName;
     }
     
     // name, {address, phone}

C969Project/Data/DatabaseHelper.cs

@@ -115,4 +115,43 @@ public static class DatabaseHelper
             throw;
         }
     }
+    
+    public static Address? RetrieveAddress(int addressId)
+    {
+        using MySqlConnection connection = new MySqlConnection(AppSettings.GetSetting("ConnectionStrings", "DefaultConnection"));
+        try
+        {
+            connection.Open();
+        }
+        catch (MySqlException e)
+        {
+            Console.WriteLine(e);
+            throw;
+        }
+        
+        string query = $"SELECT * FROM client_schedule.address WHERE addressId = {addressId}";
+        using MySqlCommand command = new MySqlCommand(query, connection);
+        using MySqlDataReader reader = command.ExecuteReader();
+        
+        while (reader.Read())
+        {
+            var addr = new Address()
+            {
+                Id = reader.GetInt32("addressId"),
+                Address1 = reader.GetString("address1"),
+                Address2 = reader.GetString("address2"),
+                CityId = reader.GetInt32("cityId"),
+                PostalCode = reader.GetString("postalCode"),
+                Phone = reader.GetString("phone"),
+                CreateDate = reader.GetDateTime("createDate"),
+                CreatedBy = reader.GetString("createdBy"),
+                LastUpdate = reader.GetDateTime("lastUpdate"),
+                LastUpdateBy = reader.GetString("lastUpdateBy"),
+            };
+            
+            return addr;
+        }
+        
+        return null;
+    }
 }

C969Project/RecordsForm.cs

@@ -13,6 +13,7 @@ public partial class RecordsForm : Form
         UpdateCustomersList();
 
         AddButton.Click += (sender, args) => { ShowDialog(new AddUpdateCustomerForm(AddUpdateCustomerForm.OperationType.Add)); };
+        ModifyButton.Click += (sender, args) => { ShowDialog(new AddUpdateCustomerForm(AddUpdateCustomerForm.OperationType.Update)); };
     }
 
     public void UpdateCustomersList()