InventoryForm.cs

using System.Drawing;
using System.Collections.Generic;
using System.Drawing.Drawing2D;



namespace shopManager
{
    public partial class InventoryForm : Form
    {
        private static InventoryForm instance;

        public static InventoryForm Instance
        {
            get
            {
                if (instance == null || instance.IsDisposed)
                {
                    instance = new InventoryForm();
                }
                return instance;
            }
        }

        public static StackDataList dataList;
        private InventoryForm()
        {
            InitializeComponent();

            dataList = new StackDataList();

            // Ensure that the entire application is closed when MyForm is closed
            this.FormClosed += (sender, e) => Application.Exit();
        }

        private void addProdButton_Click(object sender, EventArgs e)
        {
            AddProductForm addProduct = new AddProductForm();
            addProduct.ShowDialog();
        }
        public void LoadProductsToDataGridView()
        {
            // Clear existing data
            dataGridView.Rows.Clear();

            // Get all products from the stack
            List<Product> products = dataList.GetAllProducts();

            for (int i = 0; i < products.Count(); i++)
            {
                dataGridView.Rows.Add(products[i].Name, products[i].ID, products[i].Category, products[i].Quantity, products[i].TotalPrice() + "$", "Edit", "Delete");

                if (products[i].Category == "Phones")
                {
                    dataGridView.Rows[i].Cells[2].Style.BackColor = Color.Red;
                }
                else if (products[i].Category == "Cameras")
                {
                    dataGridView.Rows[i].Cells[2].Style.BackColor = Color.DarkGreen;
                }
                else
                {
                    dataGridView.Rows[i].Cells[2].Style.BackColor = Color.DarkBlue;
                }
            }
        }

        private void dataGridView_CellContentClick(object sender, DataGridViewCellEventArgs dataGrid)
        {
            if (dataGrid.RowIndex >= 0)
            {
                int columnIndex = dataGrid.ColumnIndex;
                int rowIndex = dataGrid.RowIndex;

                // Check if the "Sell" button is clicked
                if (columnIndex == dataGridView.Columns["Column6"].Index)
                {
                    string prodId = dataGridView.Rows[rowIndex].Cells[1].Value.ToString();
                    int id = int.Parse(prodId);
                    SellProductForm sellProduct = new SellProductForm(id, 'S');
                    sellProduct.ShowDialog();

                }
                // Check if the "Delete" button is clicked
                else if (columnIndex == dataGridView.Columns["Column7"].Index)
                {
                    string prodId = dataGridView.Rows[rowIndex].Cells[1].Value.ToString();
                    dataList.RemovedSpesProduct(int.Parse(prodId));
                    LoadProductsToDataGridView();
                }
            }
        }

        private void UpdateDataGridViewWithProduct(Product product)
        {
            // Clear existing data
            dataGridView.Rows.Clear();

            // Update UI with the retrieved product information
            dataGridView.Rows.Add(product.Name, product.ID, product.Category, product.Quantity, product.TotalPrice() + "$", "Edit", "Delete");
        }

        private void cancelSearchButton_Click(object sender, EventArgs e)
        {
            searchTextBox.Text = "";
            LoadProductsToDataGridView();
        }

        private void home2Button_Click(object sender, EventArgs e)
        {
            HomepageForm home = new HomepageForm();
            this.Hide();
            home.Show();
        }

        private void searchIcon_Click_1(object sender, EventArgs e)
        {
            string proID = searchTextBox.Text;

            if (int.TryParse(proID, out int id))
            {
                if (id >= 1111110)
                {
                    Product wantedProd = dataList.GetSpecificProductById(id);

                    if (wantedProd != null)
                    {
                        UpdateDataGridViewWithProduct(wantedProd);
                    }
                    else
                    {
                        MessageBox.Show($"Product with ID {id} not found.", "Product Not Found", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                }
                else
                {
                    MessageBox.Show("Please enter a valid product ID.", "Invalid Input", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
            else
            {
                MessageBox.Show("Please enter a valid numeric product ID.", "Invalid Input", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
        }

        private void InventoryForm_Load(object sender, EventArgs e)
        {
            dataGridView.CellContentClick += dataGridView_CellContentClick;

            // Load existing products into dataGridView
            LoadProductsToDataGridView();
        }
    }
}