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;

namespace ScratchBook
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            TextBox txtQuantity = new TextBox();
            TextBox txtPrice = new TextBox();
            ErrorProvider ep1 = new ErrorProvider();
            Label lblMessage = new Label();
            Int32 intQuantity = 0;
            decimal decPrice = 0;
            

            try
            {

                 intQuantity = Int32.Parse(txtQuantity.Text);

                 try
                 {

                     decPrice = decimal.Parse(txtPrice.Text);
                     
                 }
                 catch (Exception e)
                 {
                     ep1.SetError(txtPrice, "Invalid Value");
                     lblMessage.Text = "Invalid Price";
                     txtPrice.Focus();
                 }
            }
            catch (Exception e)
            {
                ep1.SetError(txtQuantity, "Invalid Value");
                lblMessage.Text = "Invalid Quantity";
                txtQuantity.Focus();
            }

        }
    }
}