ещё больше автогенерации штрих кодов + их отображение в реальном времени

WinFormsApp/FormProducts.Designer.cs

@@ -60,8 +60,11 @@
             dataGridView.Dock = DockStyle.Left;
             dataGridView.Location = new Point(0, 24);
             dataGridView.Name = "dataGridView";
+            dataGridView.ReadOnly = true;
+            dataGridView.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
             dataGridView.Size = new Size(602, 622);
             dataGridView.TabIndex = 0;
+            dataGridView.SelectionChanged += dataGridView_SelectionChanged;
             // 
             // buttonCreateProduct
             // 

WinFormsApp/FormProducts.cs

@@ -123,9 +123,9 @@ namespace WinFormsApp
             finally
             {
                 LoadData();
-                groupBoxControls.Enabled = true;
+                //groupBoxControls.Enabled = true;
                 groupBoxControls.Show();
-                groupBoxCreateProduct.Enabled = false;
+                //groupBoxCreateProduct.Enabled = false;
                 groupBoxCreateProduct.Hide();
                 textBoxName.Text = string.Empty;
                 numericUpDownAmount.Value = 0;
@@ -246,5 +246,25 @@ namespace WinFormsApp
                 form.ShowDialog();
             }
         }
+
+        private void dataGridView_SelectionChanged(object sender, EventArgs e)
+        {
+            if (dataGridView.SelectedRows.Count == 1)
+            {
+                if (!File.Exists($"product{dataGridView.SelectedRows[0].Cells["Id"].Value}.png"))
+                {
+                    var barcode = _barcodeLogic.CreateBarcode(new ProductBindingModel()
+                    {
+                        Id = (Guid)dataGridView.SelectedRows[0].Cells["Id"].Value,
+                        Name = Convert.ToString(dataGridView.SelectedRows[0].Cells["Name"].Value),
+                    }, true);
+                    pictureBox1.Image = barcode.Image;
+                }
+                else
+                {
+                    pictureBox1.Image = new Bitmap($"product{dataGridView.SelectedRows[0].Cells["Id"].Value}.png");
+                }
+            }
+        }
     }
 }