Add delegate for updating customer view from the employee add button.

QueueSys/frmCustomerView.cs

@@ -23,6 +23,12 @@ namespace QueueSys
             RefreshCustomerView();
         }
 
+        // Triggered by Employee View form add buttom as a delegate.
+        public void MessageReceived(object sender, EventArgs e)
+        {
+            RefreshCustomerView();
+        }
+
         private void RefreshCustomerView()
         {
             SqliteDataAccess sdaCxView = new SqliteDataAccess();

QueueSys/frmEmployeeView.cs

@@ -8,6 +8,10 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
+/* References */
+// Using a delegate to trigger method on the customer view form
+// https://www.coderslexicon.com/passing-data-between-forms-using-delegates-and-events/
+
 namespace QueueSys
 {
     public partial class frmEmployeeView : Form
@@ -17,18 +21,28 @@ namespace QueueSys
             InitializeComponent();
         }
 
+        // Our delegate (which "points" at any method which takes an object and EventArgs)
+        // Look familiar? This is the signature of most control events on a form
+        public delegate void SendMessage(object obj, EventArgs e);
+
+        // Here is the event we trigger to send messages out to listeners
+        public event SendMessage OnSendMessage;
+
         /* Execute when program / main form loads.
-         * Pop up the customer view screen to drag onto second monitor */
+         * Pop up the customer view screen to drag onto second monitor 
+         * creates our second form, says "attach its MessageReceived function to the event"
+         */
         private void frmEmployeeView_Load(object sender, EventArgs e)
         {
-            Form frm = new frmCustomerView();
+            frmCustomerView frm = new frmCustomerView();
+            OnSendMessage += frm.MessageReceived;
             frm.Show();
         }
 
         /* Enable options menu. */
         private void optionsToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Form frm = new frmOptions();
+            frmOptions frm = new frmOptions();
             frm.Show();
             frm.Activate();
         }
@@ -52,7 +66,8 @@ namespace QueueSys
 
             sda.SaveCustomer(evNewCx);
 
-            //sda.LoadEmployeeView();
+            //Invoke the delegate to update customer view.
+            OnSendMessage?.Invoke(this, e);
 
             tbCustomerName.Text = "";
             cbNumBags.Text = "";

QueueSys/obj/Debug/QueueSys.csproj.FileListAbsolute.txt

@@ -26,3 +26,11 @@ C:\Users\kougyoku\Google Drive\TINFO 220_ HCI Group Project\QueueSys\QueueSys\bi
 C:\Users\kougyoku\Google Drive\TINFO 220_ HCI Group Project\QueueSys\QueueSys\bin\Debug\System.Data.SQLite.xml
 C:\Users\kougyoku\Google Drive\TINFO 220_ HCI Group Project\QueueSys\QueueSys\bin\Debug\System.Data.SQLite.dll.config
 C:\Users\kougyoku\Google Drive\TINFO 220_ HCI Group Project\QueueSys\QueueSys\obj\Debug\QueueSys.csproj.CopyComplete
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\bin\Debug\QueueSys.db
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\bin\Debug\Dapper.dll
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\bin\Debug\System.Data.SQLite.dll
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\bin\Debug\Dapper.xml
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\bin\Debug\System.Data.SQLite.xml
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\bin\Debug\System.Data.SQLite.dll.config
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\obj\Debug\QueueSys.frmOptions.resources
+C:\Users\kougyoku\source\repos\QueueSys\QueueSys\obj\Debug\QueueSys.csproj.CopyComplete