using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Net;
using System.Windows.Forms;
using System.IO;
using Microsoft.VisualBasic;

namespace WindowsFormsApplication2
{
public partial class frmChkBal : Form
{
public frmChkBal()
{
InitializeComponent();
}

private void frmChkBal_Load(object sender, EventArgs e)
{
this.txtUser.Select();
}

private bool CheckErrors()
{
if (txtUser.Text.Trim() == String.Empty)
return true;
if (txtPass.Text.Trim() == String.Empty)
return true;
return false;
}
private void btnChkBal_Click(object sender, EventArgs e)
{
if (CheckErrors())
{
MessageBox.Show("Please enter Your Username & Password", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
btnClear.Visible = true;
txtPass.Clear();
txtUser.Clear();
txtUser.Select();
}
else
{
Uri url = new Uri("https://www.isms.com.my/isms_balance.php?un=" + txtUser.Text + "&pwd=" + txtPass.Text);
WebRequest myweb = WebRequest.Create(url);
WebResponse mywebres = myweb.GetResponse();
StreamReader read = new StreamReader(mywebres.GetResponseStream());
String balance_str = read.ReadToEnd();
MessageBox.Show(string.Format("Balance : {0}", balance_str), "User Balance", MessageBoxButtons.OK);
txtPass.Clear();
txtUser.Clear();
txtUser.Select();
btnClear.Visible = true;
btnClear.Enabled = true;
}
}

private void btnClear_Click(object sender, EventArgs e)
{
txtUser.Clear();
txtPass.Clear();
txtUser.Select();
}
private void txtUser_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
btnChkBal_Click(sender, e);
}
}

private void txtPass_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter){
btnChkBal_Click(sender, e);
}
}
}
}