Try -
Code:
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace WindowsApplication9
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private int method;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.Button button5;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.button5 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(16, 8);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(48, 20);
this.textBox1.TabIndex = 0;
this.textBox1.Text = "";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(176, 8);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(48, 20);
this.textBox2.TabIndex = 1;
this.textBox2.Text = "";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(64, 32);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(120, 20);
this.textBox3.TabIndex = 6;
this.textBox3.Text = "";
//
// label1
//
this.label1.Location = new System.Drawing.Point(16, 32);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(48, 16);
this.label1.TabIndex = 7;
this.label1.Text = "Answer";
//
// button1
//
this.button1.Location = new System.Drawing.Point(184, 32);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(40, 24);
this.button1.TabIndex = 8;
this.button1.Text = "Calc";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(72, 8);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(24, 23);
this.button2.TabIndex = 9;
this.button2.Text = "+";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(96, 8);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(24, 23);
this.button3.TabIndex = 10;
this.button3.Text = "-";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(144, 8);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(24, 23);
this.button4.TabIndex = 11;
this.button4.Text = "/";
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// button5
//
this.button5.Location = new System.Drawing.Point(120, 8);
this.button5.Name = "button5";
this.button5.Size = new System.Drawing.Size(24, 23);
this.button5.TabIndex = 12;
this.button5.Text = "*";
this.button5.Click += new System.EventHandler(this.button5_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(248, 61);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.button5,
this.button4,
this.button3,
this.button2,
this.button1,
this.label1,
this.textBox3,
this.textBox2,
this.textBox1});
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button4_Click(object sender, System.EventArgs e)
{
method = 4;
}
private void button2_Click(object sender, System.EventArgs e)
{
method = 1;
}
private void button3_Click(object sender, System.EventArgs e)
{
method = 2;
}
private void button5_Click(object sender, System.EventArgs e)
{
method = 3;
}
private void button1_Click(object sender, System.EventArgs e)
{
int left, right, sum;
left = int.Parse(textBox1.Text); //change the text to a number
right = int.Parse(textBox2.Text);
if (method == 1)
{
sum = left + right;
textBox3.Text = sum.ToString();
}
else if (method == 2)
{
sum = left - right;
textBox3.Text = sum.ToString();
}
else if (method == 3)
{
sum = left * right;
textBox3.Text = sum.ToString();
}
else if (method == 4)
{
sum = left / right;
textBox3.Text = sum.ToString();
}
else
{
textBox3.Text = "Error";
}
}
}
}