Biskilog/BISKILOG POS PREMIUM/Products Module/StockForm.cs

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

namespace Point_Of_Sale_Managment
{
    public partial class StockForm : Form
    {
        SqlConnection cn;
        SqlCommand cm, cm1;
        DatabaseConn databasecon = new DatabaseConn();
        SqlDataReader dr;
        int newqty, oldqty, upqty;
        string oldval, newval = "0";
        string productCode;
        SqlTransaction transaction;
        int total = 0;
        ProductsMainHolder mainHolder;
        public StockForm(ProductsMainHolder productsMain, string code = null, string oldquantity = null)
        {
            InitializeComponent();
            mainHolder = productsMain;
            if (!String.IsNullOrEmpty(code))
            {
                productCode = code;
                oldval = oldquantity;
                txtRef.Text = getReference();
            }
            cn = new SqlConnection(databasecon.MyConnection());
            holding1.Left = (ClientSize.Width - holding1.Width) / 2;
            holding2.Left = (ClientSize.Width - holding2.Width) / 2;
        }

        private async void StockForm_Load(object sender, EventArgs e)
        {
            txtIN.Text = MainLogin.login_user;
            Task<int> task = new Task<int>(() =>
            {
                LoadProducts();
                LoadStock();
                return 1;
            });
            holding1.Visible = true;
            holding2.Visible = true;
            task.Start();
            await task;
            holding1.Visible = false;
            holding2.Visible = false;
        }
        public int LoadProducts()
        {
            try
            {
                dataGridView1.Invoke(new Action(() =>
                {
                    int i = 0;
                    dataGridView1.Rows.Clear();
                    cn.Open();
                    cm = new SqlCommand("Select tblInventory.pcode,pdesc,tblInventory.quantity from tblProduct Inner Join tblInventory On tblInventory.pcode =" +
                        "tblProduct.pcode where (tblProduct.pdesc like '%" + txtSearch.Text + "%') or (tblProduct.product_name like '%" + txtSearch.Text + "%') or" +
                        " (tblProduct.pcode like '%" + txtSearch.Text + "%') order by tblInventory.quantity asc", cn);
                    dr = cm.ExecuteReader();
                    while (dr.Read())
                    {
                        i++;
                        dataGridView1.Rows.Add(i, dr[0].ToString(), dr[1].ToString(), dr[2].ToString());
                    }
                    dr.Close();
                    cn.Close();
                    dataGridView1.ClearSelection();
                }));
                return 1;
            }
            catch
            {
                cn.Close();
                return 0;
            }
        }
        private async void btnSave_Click(object sender, EventArgs e)
        {
            holding2.Visible = true;
            if (total >= 3)
            {
                Task<int> task = new Task<int>(StockUpdate);
                task.Start();
                int result = await task;
                if (result == 1)
                {
                    NoAction action = new NoAction("Operation Completed Successfully",
                        "You have successfully update the stock entry");
                    action.BringToFront();
                    action.ShowDialog();
                    Form1.printerDialog = null;
                    dataGridView1.ClearSelection();
                    txtAdd.Text = "";
                    txtRef.Text = "";
                }
                else if (result == 0)
                {
                    NoAction action = new NoAction("Operation failed", "There was an error while trying to update the stcok entry!!");
                    action.BringToFront();
                    action.ShowDialog();
                    Form1.printerDialog = null;
                }
            }
            else
            {
                NoAction action = new NoAction("Operation denied", "To be able to restock items, you must fill all entries!!");
                action.BringToFront();
                action.ShowDialog();
                Form1.printerDialog = null;
            }
            holding2.Visible = false;
        }
        public int StockUpdate()
        {
            try
            {

                oldqty = int.Parse(oldval);
                newqty = int.Parse(newval);
                upqty = oldqty + newqty;

                string Messenger = "Are you sure you want to add " + newqty + " items to " + productCode + " ?";
                string heading = "Adding item";
                Confirmation Confirmation = new Confirmation(message: Messenger, title: heading);
                Confirmation.BringToFront();
                Confirmation.ShowDialog();
                if (Confirmation.DialogResult == DialogResult.Yes)
                {
                    txtRef.Invoke(new Action(() =>
                    {
                        cn.Open();
                        transaction = cn.BeginTransaction();
                        cm = new SqlCommand("Insert into tbStock (refno,pcode,qty,sdate,stockinby,branchID,countID) values " +
                            "(@refno,@pcode,@qty,@sdate,@stockinby,@branchID,@countID)", cn);
                        cm.Parameters.AddWithValue("@refno", txtRef.Text);
                        cm.Parameters.AddWithValue("@pcode", productCode);
                        cm.Parameters.AddWithValue("@qty", upqty);
                        cm.Parameters.AddWithValue("@sdate", datePicka.Value);
                        cm.Parameters.AddWithValue("@stockinby", txtIN.Text);
                        cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                        cm.Parameters.AddWithValue("@countID", productCode + Form1.branch + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                        cm.Transaction = transaction;
                        cm.ExecuteNonQuery();
                        cm1 = new SqlCommand("Update tblInventory set quantity = @quantity where branchID = @branchID and pcode = @pcode " +
                        "Insert into tblInventoryEntries(pcode, quantity, date, countID, branchID) values (@pcode,@quantity,@date,@countID,@branchID)", cn);
                        cm1.Parameters.AddWithValue("@pcode", productCode);
                        cm1.Parameters.AddWithValue("@date", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                        cm1.Parameters.AddWithValue("@branchID", Form1.branch);
                        cm1.Parameters.AddWithValue("@countID", productCode + Form1.branch + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                        cm1.Parameters.AddWithValue("@quantity", upqty);
                        cm1.Transaction = transaction;
                        cm1.ExecuteNonQuery();
                        transaction.Commit();
                        cn.Close();
                        LoadStock();
                        LoadProducts();
                    }));
                    return 1;
                }
                else
                {
                    return 2;
                }
            }
            catch
            {
                cn.Close();
                return 0;
            }
        }
        public int LoadStock()
        {
            try
            {
                dataGridView2.Invoke(new Action(() =>
                {
                    int i = 0;
                    dataGridView2.Rows.Clear();
                    cn.Open();
                    cm = new SqlCommand("Select TOP (100) refno,tblProduct.pcode,tblProduct.product_name,tblProduct.pdesc,qty,sdate,stockinby from tbStock Inner " +
                        "Join tblProduct On tblProduct.pcode = tbStock.pcode where tblProduct.branchID = @branch order by sdate desc", cn);
                    cm.Parameters.AddWithValue("@branch", Settings.Default.BranchID);
                    dr = cm.ExecuteReader();
                    while (dr.Read())
                    {
                        i++;
                        dataGridView2.Rows.Add(i, dr[0].ToString(), dr[1].ToString(), dr[2].ToString(), dr[3].ToString(), dr[4].ToString(),
                            Convert.ToDateTime(dr[5].ToString()).ToLongDateString(), dr[6].ToString());
                    }
                    dr.Close();
                    cn.Close();
                    dataGridView2.ClearSelection();
                }));
                return 1;
            }
            catch
            {
                cn.Close();
                return 0;
            }
        }
        public string getReference()
        {
            return productCode.Substring(0, 3).ToUpper() + DateTime.Now.ToString("/yyyy/MM/dd/HH/mm/ss/fff");
        }
        private async void txtSearch_TextChanged(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(LoadProducts);
            holding1.Visible = true;
            task.Start();
            await task;
            holding1.Visible = false;
        }
        private void TxtRef_TextChanged(object sender, EventArgs e)
        {
            lockSave();
        }
        private void TxtAdd_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;
            }
        }
        private void TxtIN_TextChanged(object sender, EventArgs e)
        {
            lockSave();
        }
        public void lockSave()
        {
            foreach (Control box in panel5.Controls)
            {
                if (box is TextBox)
                {
                    if (String.IsNullOrEmpty(box.Text))
                    {
                        total--;
                        btnSave.Enabled = false;
                    }
                    else
                    {
                        total++;
                        btnSave.Enabled = true;
                    }
                }
            }
        }
        private void txtAdd_TextChanged(object sender, EventArgs e)
        {
            lockSave();
            if (!String.IsNullOrEmpty(txtAdd.Text))
            {
                newval = txtAdd.Text;
            }
        }
        private void DataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            oldval = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
            productCode = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
            txtRef.Text = getReference();
        }
    }
}