TripCreate.cs

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Data;

namespace H1
{
    public partial class TripCreate : Form
    {
        // Colors based on the provided specs
        private Color navbarColor = Color.FromArgb(44, 62, 80);
        private Color headerColor = Color.FromArgb(52, 152, 219);
        private Color whiteColor = Color.White;
        private Color lightGrayColor = Color.FromArgb(240, 240, 240);

        // Data storage
        private DataTable tripsData = new DataTable();
        private DataTable categoriesData = new DataTable();

        public TripCreate()
        {
            InitializeComponent();
            InitializeData();
            LoadSampleData();
        }

        private void InitializeData()
        {
            // Setup trips data table
            tripsData.Columns.Add("TripID", typeof(int));
            tripsData.Columns.Add("Title", typeof(string));
            tripsData.Columns.Add("Description", typeof(string));
            tripsData.Columns.Add("Destination", typeof(string));
            tripsData.Columns.Add("CategoryID", typeof(int));
            tripsData.Columns.Add("Category", typeof(string));
            tripsData.Columns.Add("StartDate", typeof(DateTime));
            tripsData.Columns.Add("EndDate", typeof(DateTime));
            tripsData.Columns.Add("Price", typeof(decimal));
            tripsData.Columns.Add("MaxCapacity", typeof(int));
            tripsData.Columns.Add("Difficulty", typeof(string));
            tripsData.Columns.Add("Status", typeof(string));

            // Setup categories data table
            categoriesData.Columns.Add("CategoryID", typeof(int));
            categoriesData.Columns.Add("Name", typeof(string));
            categoriesData.Columns.Add("Description", typeof(string));
        }

        private void LoadSampleData()
        {
            // Load sample categories
            categoriesData.Rows.Add(1, "Adventure", "High-energy outdoor activities");
            categoriesData.Rows.Add(2, "Cultural", "Immersive cultural experiences");
            categoriesData.Rows.Add(3, "Beach", "Relaxing beach vacations");
            categoriesData.Rows.Add(4, "Mountain", "Mountain hiking and climbing");
            categoriesData.Rows.Add(5, "City Tour", "Urban exploration tours");
            categoriesData.Rows.Add(6, "Wildlife", "Wildlife safaris and encounters");
            categoriesData.Rows.Add(7, "Historical", "Historical sites and museums");

            // Load sample trips
            tripsData.Rows.Add(1, "Paris City Tour", "Explore the beautiful city of Paris", "Paris", 5, "City Tour",
                              new DateTime(2025, 5, 15), new DateTime(2025, 5, 20), 1200m, 25, "Easy", "Active");
            tripsData.Rows.Add(2, "Alpine Adventure", "Challenging mountain hikes", "Swiss Alps", 4, "Mountain",
                              new DateTime(2025, 6, 10), new DateTime(2025, 6, 17), 1800m, 15, "Hard", "Active");
            tripsData.Rows.Add(3, "Safari Experience", "African wildlife safari", "Serengeti", 6, "Wildlife",
                              new DateTime(2025, 7, 5), new DateTime(2025, 7, 12), 2500m, 12, "Medium", "Active");

            // Bind data to controls
            dgvTrips.DataSource = tripsData;
            cmbCategory.DataSource = categoriesData;
            cmbCategory.DisplayMember = "Name";
            cmbCategory.ValueMember = "CategoryID";

            FormatTripsGrid();
        }

        private void FormatTripsGrid()
        {
            dgvTrips.Columns["TripID"].Visible = false;
            dgvTrips.Columns["CategoryID"].Visible = false;
            dgvTrips.Columns["Description"].Visible = false;

            dgvTrips.Columns["Title"].HeaderText = "Trip Title";
            dgvTrips.Columns["Destination"].HeaderText = "Destination";
            dgvTrips.Columns["StartDate"].HeaderText = "Start Date";
            dgvTrips.Columns["EndDate"].HeaderText = "End Date";
            dgvTrips.Columns["Price"].HeaderText = "Price (USD)";
            dgvTrips.Columns["MaxCapacity"].HeaderText = "Capacity";

            dgvTrips.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
            dgvTrips.RowHeadersVisible = false;
            dgvTrips.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
        }

        private void btnCreateTrip_Click(object sender, EventArgs e)
        {
            if (ValidateTripForm())
            {
                // Create new trip
                DataRow newTrip = tripsData.NewRow();
                newTrip["TripID"] = tripsData.Rows.Count + 1;
                newTrip["Title"] = txtTitle.Text;
                newTrip["Description"] = txtDescription.Text;
                newTrip["Destination"] = txtDestination.Text;
                newTrip["CategoryID"] = cmbCategory.SelectedValue;
                newTrip["Category"] = cmbCategory.Text;
                newTrip["StartDate"] = dtpStartDate.Value;
                newTrip["EndDate"] = dtpEndDate.Value;
                newTrip["Price"] = decimal.Parse(txtPrice.Text);
                newTrip["MaxCapacity"] = int.Parse(txtCapacity.Text);
                newTrip["Difficulty"] = cmbDifficulty.SelectedItem.ToString();
                newTrip["Status"] = "Active";

                tripsData.Rows.Add(newTrip);
                ClearForm();
                MessageBox.Show("Trip created successfully!", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private bool ValidateTripForm()
        {
            if (string.IsNullOrWhiteSpace(txtTitle.Text))
            {
                MessageBox.Show("Please enter a trip title", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return false;
            }

            if (string.IsNullOrWhiteSpace(txtDestination.Text))
            {
                MessageBox.Show("Please enter a destination", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return false;
            }

            if (dtpStartDate.Value >= dtpEndDate.Value)
            {
                MessageBox.Show("End date must be after start date", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return false;
            }

            if (!decimal.TryParse(txtPrice.Text, out decimal price) || price <= 0)
            {
                MessageBox.Show("Please enter a valid price", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return false;
            }

            if (!int.TryParse(txtCapacity.Text, out int capacity) || capacity <= 0)
            {
                MessageBox.Show("Please enter a valid capacity", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return false;
            }

            return true;
        }

        private void ClearForm()
        {
            txtTitle.Clear();
            txtDescription.Clear();
            txtDestination.Clear();
            cmbCategory.SelectedIndex = 0;
            dtpStartDate.Value = DateTime.Now;
            dtpEndDate.Value = DateTime.Now.AddDays(1);
            txtPrice.Clear();
            txtCapacity.Clear();
            cmbDifficulty.SelectedIndex = 0;
        }

        private void dgvTrips_SelectionChanged(object sender, EventArgs e)
        {
            if (dgvTrips.SelectedRows.Count > 0)
            {
                DataRowView row = (DataRowView)dgvTrips.SelectedRows[0].DataBoundItem;
                LoadTripDetails(row.Row);
            }
        }

        private void LoadTripDetails(DataRow trip)
        {
            txtTitle.Text = trip["Title"].ToString();
            txtDescription.Text = trip["Description"].ToString();
            txtDestination.Text = trip["Destination"].ToString();
            cmbCategory.SelectedValue = trip["CategoryID"];
            dtpStartDate.Value = (DateTime)trip["StartDate"];
            dtpEndDate.Value = (DateTime)trip["EndDate"];
            txtPrice.Text = trip["Price"].ToString();
            txtCapacity.Text = trip["MaxCapacity"].ToString();
            cmbDifficulty.SelectedItem = trip["Difficulty"].ToString();

            btnUpdateTrip.Enabled = true;
            btnDeleteTrip.Enabled = true;
            btnCreateTrip.Enabled = false;
        }

        private void btnUpdateTrip_Click(object sender, EventArgs e)
        {
            if (dgvTrips.SelectedRows.Count == 0)
            {
                MessageBox.Show("Please select a trip to update", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            if (ValidateTripForm())
            {
                DataRowView row = (DataRowView)dgvTrips.SelectedRows[0].DataBoundItem;
                row["Title"] = txtTitle.Text;
                row["Description"] = txtDescription.Text;
                row["Destination"] = txtDestination.Text;
                row["CategoryID"] = cmbCategory.SelectedValue;
                row["Category"] = cmbCategory.Text;
                row["StartDate"] = dtpStartDate.Value;
                row["EndDate"] = dtpEndDate.Value;
                row["Price"] = decimal.Parse(txtPrice.Text);
                row["MaxCapacity"] = int.Parse(txtCapacity.Text);
                row["Difficulty"] = cmbDifficulty.SelectedItem.ToString();

                MessageBox.Show("Trip updated successfully!", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
                ClearForm();
                btnCreateTrip.Enabled = true;
            }
        }

        private void btnDeleteTrip_Click(object sender, EventArgs e)
        {
            if (dgvTrips.SelectedRows.Count == 0)
            {
                MessageBox.Show("Please select a trip to delete", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            var confirm = MessageBox.Show("Are you sure you want to delete this trip?", "Confirm Delete",
                                         MessageBoxButtons.YesNo, MessageBoxIcon.Question);

            if (confirm == DialogResult.Yes)
            {
                DataRowView row = (DataRowView)dgvTrips.SelectedRows[0].DataBoundItem;
                tripsData.Rows.Remove(row.Row);
                ClearForm();
                btnCreateTrip.Enabled = true;
                MessageBox.Show("Trip deleted successfully!", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void btnClearForm_Click(object sender, EventArgs e)
        {
            ClearForm();
            btnCreateTrip.Enabled = true;
            btnUpdateTrip.Enabled = false;
            btnDeleteTrip.Enabled = false;
        }
    }
}