Biskilog/BISKILOG POS PREMIUM/Delivery/TruckStockDown.cs

using BiskLog_Point_Of_Sale.Classes;
using BiskLog_Point_Of_Sale.Multiple_Login;
using BiskLog_Point_Of_Sale.Properties;
using Point_Of_Sale_Managment;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace BiskLog_Point_Of_Sale.Delivery
{
    public partial class TruckStockDown : Form
    {
        public int quantity = 0;
        public string total;
        string truckID;
        string pcode;
        string unit;
        int oldstock;
        SqlConnection cn;
        SqlCommand cm;
        DatabaseConn conn = new DatabaseConn();
        SqlDataReader dr;
        public TruckStockDown(string truckID, string pcode, string name, int current,string unit,string unitCode)
        {
            InitializeComponent();
            this.truckID = truckID;
            this.pcode = pcode;
            this.unit = unitCode;
            lblPname.Text = name;
            lblUnit.Text = unit;
            cn = new SqlConnection(conn.MyConnection());
            oldstock = current;
        }

        private void Exit_MouseEnter(object sender, EventArgs e)
        {
            exit.BackColor = Color.Crimson;
        }

        private void Exit_MouseLeave(object sender, EventArgs e)
        {
            exit.BackColor = Color.FromArgb(20, 158, 132);
        }

        private void Exit_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.None;
            this.Close();
        }

        private async void Button1_Click(object sender, EventArgs e)
        {
            quantity = int.Parse(stockQuantity.Text);
            if (quantity > oldstock)
            {
                this.DialogResult = DialogResult.Cancel;
                this.Close();
            }
            else
            {
                Task<int> task = new Task<int>(offLoad);
                holding.Visible = true;
                task.Start();
                int result = await task;
                if (result == 1)
                {
                    this.DialogResult = DialogResult.OK;
                    this.Close();
                }
                else
                {
                    this.DialogResult = DialogResult.Abort;
                    this.Close();
                }
                holding.Visible = false;
            }
        }
        private int offLoad()
        {
            cn.Open();
            SqlTransaction transaction;
            transaction = cn.BeginTransaction();
            try
            {
                cm = new SqlCommand("Update tblTruckInventory set quantity = quantity - @quantity where truckID = @truckID and pcode = @pcode and unit = @unit", cn, transaction);
                cm.Parameters.AddWithValue("@truckID", truckID);
                cm.Parameters.AddWithValue("@quantity", quantity);
                cm.Parameters.AddWithValue("@pcode", pcode);
                cm.Parameters.AddWithValue("@unit", unit);
                cm.ExecuteNonQuery();

                cm = new SqlCommand("Declare @baseunit varchar(150) = (Select baseUnit from tblProduct where pcode = @pcode) " +
                         "Declare @dquantity int = Case when @baseUnit = @unit then 1 * @quantity else (Select[quantity/unit] * @quantity as quantity from ProductAltUnit " +
                         "where pcode = @pcode and unitCode = @unit and branchID = @branchID) end " +
                         "Declare @newQuantity int = (Select MAX(quantity) + MIN(@dquantity) from tblInventory where pcode = @pcode and branchID = @branchID) " +
                         "Update tblInventory set quantity = @newQuantity where pcode = @pcode and branchID = @branchID " +
                         "Insert into tblInventoryEntries(pcode, quantity, date, countID, branchID) values " +
                         "(@pcode, @newQuantity, @date, @countID, @branchID)", cn, transaction);
                cm.Parameters.AddWithValue("@pcode", pcode);
                cm.Parameters.AddWithValue("@date", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                cm.Parameters.AddWithValue("@branchID", Form1.branch);
                cm.Parameters.AddWithValue("@countID", pcode + Form1.branch + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                cm.Parameters.AddWithValue("@unit", unit);
                cm.Parameters.AddWithValue("@quantity", quantity);
                cm.ExecuteNonQuery();

                cm = new SqlCommand("Select SUM(TP.price * TI.quantity) from tblTruckInventory TI Inner Join tblProduct TP On TP.pcode = TI.pcode " +
                        "where TI.truckID = @truckID and TP.branchID = @branchID and TI.pcode = @pcode and TI.unit = TP.baseUnit " +
                        "Select SUM(PAU.[price/unit] * TI.quantity) from tblTruckInventory TI Inner Join ProductAltUnit PAU On PAU.pcode = TI.pcode " +
                        "where TI.truckID = @truckID and PAU.branchID = @branchID and TI.pcode = @pcode and TI.unit = PAU.unitCode", cn, transaction);
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm.Parameters.AddWithValue("@truckID", truckID);
                cm.Parameters.AddWithValue("@pcode", pcode);
                cm.ExecuteNonQuery();
                dr = cm.ExecuteReader();
                dr.Read();
                if (dr.HasRows)
                {
                    total = Settings.Default.currrencyCode + " " + dr[0].ToString();
                }
                else
                {
                    dr.NextResult();
                    if (dr.HasRows)
                        total = Settings.Default.currrencyCode + " " + dr[0].ToString();
                }
                dr.Close();
                transaction.Commit();
                cn.Close();
                return 1;
            }
            catch (Exception ex)
            {
                cn.Close();
                ErrorLogging.WriteToFile(ex.ToString());
                return 0;
            }
        }
        private void StockQuantity_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 8)
            {
                //accepts backspace
            }
            else if ((e.KeyChar < 48) || (e.KeyChar > 57)) //ascii code 48-57 between 0-9
            {
                e.Handled = true;
            }
        }
    }
}