Add: Refresh employee view after clicking the add button.

Change: Clear the employee datagrid view after adding a new cutsomer.
Update/Bugfix: Incorrectly updating the combobox selection when populating the datagrid view. Fixed.
Add: Delete button functionality.
Add: Event hooking status combobox into a selection change commited event to automatically update db/customer view when status changes.

QueueSys/frmEmployeeView.cs

@@ -75,10 +75,15 @@ namespace QueueSys
             tbEmployeeName.Text = "";
 
             MessageBox.Show("Customer has been added!", "Queue System", MessageBoxButtons.OK, MessageBoxIcon.Information);
+
+            RefreshEmployeeView();
         }
 
         private void RefreshEmployeeView()
         {
+            dgvEmployeeView.Rows.Clear();
+            dgvEmployeeView.Refresh();
+
             // Build the row.
             SqliteDataAccess sdaEvView = new SqliteDataAccess();
             List<EmployeeView> evList = new List<EmployeeView>();
@@ -113,7 +118,7 @@ namespace QueueSys
             //Select the id column from the current row.
             foreach(DataGridViewRow row in dgvEmployeeView.Rows)
             {
-                cxStatus = sdaEvView.GetCxStatus(Int32.Parse(dgvEmployeeView.CurrentRow.Cells[0].Value.ToString()));
+                cxStatus = sdaEvView.GetCxStatus(Int32.Parse(dgvEmployeeView.Rows[row.Index].Cells[0].Value.ToString()));
                 row.Cells[2].Value = cxStatus[0].status;
             }
 
@@ -127,13 +132,83 @@ namespace QueueSys
             dgvEmployeeView.Columns.Add(btn);
         }
 
+
         private void dgvEmployeeView_CellClick(object sender, DataGridViewCellEventArgs e)
         {
+            //The delete button was clicked.
             if (e.ColumnIndex == 3)
             {
-                MessageBox.Show("Row"+e.RowIndex);
+                //Sanity check, per option.
+                if (Properties.Settings.Default.ConfirmDelete)
+                {
+                    DialogResult result = MessageBox.Show("Are you sure you want to delete this customer?", "Queue System", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation);
+
+                    if (result == DialogResult.No)
+                    {
+                        MessageBox.Show("Customer was not deleted.", "Queue System", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                        return;
+                    }
+                }
+
+                SqliteDataAccess sdaEvView = new SqliteDataAccess();
+
+                EmployeeView evCustomer = new EmployeeView();
+                evCustomer.id = Int32.Parse(dgvEmployeeView.CurrentRow.Cells[0].Value.ToString());
+
+                sdaEvView.ArchiveCustomer(evCustomer);
+                RefreshEmployeeView();
+
+                //Invoke the delegate to update customer view with updated data.
+                OnSendMessage?.Invoke(this, e);
+
+                MessageBox.Show("Customer has been removed from the queue", "Queue System", MessageBoxButtons.OK, MessageBoxIcon.Information);
             }
 
         }
+
+        // This event hooks the status combobox into the change commit event
+        private void dgvEmployeeView_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
+        {
+            if (dgvEmployeeView.CurrentCell.ColumnIndex == 2)
+            {
+                ComboBox combo = e.Control as ComboBox;
+
+                if(combo != null)
+                {
+                    combo.SelectionChangeCommitted += new EventHandler(dgvCbStatus_SelectionChangeCommitted);
+                }
+            }
+        }
+
+        /* This event fires when the "status" combo box was changed
+         * and that change was "committed"
+         * This is needed to update the backend SQL db on demand,
+         * then update the customer view screen.
+         */
+        private void dgvCbStatus_SelectionChangeCommitted(object sender, EventArgs e)
+        {
+            DataGridViewComboBoxEditingControl dgvcbec = sender as DataGridViewComboBoxEditingControl;
+            int CustomerId = Int32.Parse(dgvcbec.EditingControlDataGridView.CurrentRow.Cells[0].Value.ToString());
+
+            string new_status = dgvcbec.Text;
+
+            //Check to see if we need an update.
+            SqliteDataAccess sdaEvView = new SqliteDataAccess();
+
+            List<StatusModel> cxStatus = new List<StatusModel>();
+            cxStatus = sdaEvView.GetCxStatus(CustomerId);
+
+            // Update not required.
+            if (cxStatus[0].status == new_status)
+                return;
+
+            /* Update of the backend DB required beyond this point
+             * Update the customer status on the backend db.
+             */
+            sdaEvView.UpdateCustomerStatus(CustomerId, new_status);
+
+            //Invoke the delegate to update customer view with updated data.
+            OnSendMessage?.Invoke(this, e);
+        }
     }
 }