Biskilog/BISKILOG POS BASIC/Customer/ViewCustomerSales.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.Customer
{
    public partial class ViewCustomerSales : Form
    {
        SqlConnection cn;
        SqlDataReader dr;
        SqlCommand cm;
        DatabaseConn conn = new DatabaseConn();
        string receiptID, customerID;
        public ViewCustomerSales(string receiptID, string customerID)
        {
            InitializeComponent();
            holding.Left = (ClientSize.Width - holding.Width) / 2;
            holding.Top = (ClientSize.Height - holding.Height) / 2;
            cn = new SqlConnection(conn.MyConnection());
            this.receiptID = receiptID;
            this.customerID = customerID;
        }
        private void CLOSE_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        private void CLOSE_MouseEnter(object sender, EventArgs e)
        {
            CLOSE.BackColor = Color.Crimson;
        }
        private void CLOSE_MouseLeave(object sender, EventArgs e)
        {
            CLOSE.BackColor = Color.Transparent;
        }
        private async void ViewCustomerSales_Load(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(LoadReceipt);
            holding.Visible = true;
            task.Start();
            int result = await task;
            if (result == 0)
            {
                string title = "Error Occurred";
                string message = "An error occurred while trying to load sales please try again later.";
                NoAction noAction = new NoAction(title, message);
                noAction.BringToFront();
                noAction.ShowDialog();
            }
            holding.Visible = false;
        }
        public int LoadReceipt()
        {
            try
            {
                dataGridView1.Invoke(new Action(() =>
                {
                    int i = 1;
                    cn.Open();
                    cm = new SqlCommand("Select tc.date,tp.product_name,CAST(tc.total/tc.price AS INT) as quantity ,tc.total,u.unitname " +
                        "from tblCustomerPurchases cp Inner Join tblCart tc on tc.transno = cp.transactionID " +
                        "Inner Join tblProduct tp On tp.pcode = tc.id Inner Join UnitOfMeasure u On u.unitCode = tc.unit " +
                        "where cp.customerID = @customerID and tc.status <> 'CANCELLED' and tc.branchID = @branch and tc.transno = @transactionID " +
                        "group by tc.date, tp.product_name, tc.total, tc.price, u.unitname", cn);
                    cm.Parameters.AddWithValue("@transactionID", receiptID);
                    cm.Parameters.AddWithValue("@customerID", customerID);
                    cm.Parameters.AddWithValue("@branch", Settings.Default.BranchID);
                    cm.ExecuteNonQuery();
                    dr = cm.ExecuteReader();
                    while (dr.Read())
                    {
                        dataGridView1.Rows.Add(i, dr[0].ToString(), dr[1].ToString(), dr[2].ToString(),
                            dr[4].ToString(),Settings.Default.currrencyCode + " " + dr[3].ToString() );
                        i++;
                    }
                    dr.Close();
                    cn.Close();
                }));
                return 1;
            }
            catch (Exception ex)
            {
                ErrorLogging.WriteToFile(ex.ToString());
                cn.Close();
                return 0;
            }
        }
    }
}