In this blog we will know how to sum three numbers using
array concept.
using System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Drawing;
using
System.Linq;
using
System.Text;
using
System.Windows.Forms;
namespace
Sum_using_array
{
public partial class Form1 : Form
{
int[]
n1 = new int[3];
public
Form1()
{
InitializeComponent();
}
private
void btn_sum_Click(object
sender, EventArgs e)
{
int
value;
if
(int.TryParse(textBox1.Text, out value))
n1[0] = value;
if
(int.TryParse(textBox2.Text, out value))
n1[1] = value;
if
(int.TryParse(textBox3.Text, out value))
n1[2] = value;
textBox4.Text =
n1.Sum().ToString();
}
private
void textBox1_KeyPress(object
sender, KeyPressEventArgs e)
{
if
(!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString(),
"\\d+"))
{
e.Handled = true;
}
}
private
void textBox2_KeyPress(object
sender, KeyPressEventArgs e)
{
if
(!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString(),
"\\d+"))
{
e.Handled = true;
}
}
private
void textBox3_KeyPress(object
sender, KeyPressEventArgs e)
{
if
(!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString(),
"\\d+"))
{
e.Handled = true;
}
}
}
}