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 TestApplication { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void btn1_Click(object sender, EventArgs e) { txtDisplay.Text += "1"; } private void btn2_Click(object sender, EventArgs e) { txtDisplay.Text += "2"; } private void btn3_Click(object sender, EventArgs e) { txtDisplay.Text += "3"; } private void btn4_Click(object sender, EventArgs e) { txtDisplay.Text += "4"; } private void btn5_Click(object sender, EventArgs e) { txtDisplay.Text += "5"; } private void btn6_Click(object sender, EventArgs e) { txtDisplay.Text += "6"; } private void btn7_Click(object sender, EventArgs e) { txtDisplay.Text += "7"; } private void btn8_Click(object sender, EventArgs e) { if (digitsOnDisplay < Max_Digits_On_Display) { txtDisplay.Text += "8"; digitsOnDisplay++; } } private void btn9_Click(object sender, EventArgs e) { if (digitsOnDisplay < Max_Digits_On_Display) { txtDisplay.Text += "9"; digitsOnDisplay++; } } private void btn0_Click(object sender, EventArgs e) { if (digitsOnDisplay < Max_Digits_On_Display) { txtDisplay.Text += "0"; digitsOnDisplay++; } } private void buttonDecimal_Click(object sender, EventArgs e) { if (digitsOnDisplay < Max_Digits_On_Display) { txtDisplay.Text += "."; digitsOnDisplay++; } } private void btnAdd_Click(object sender, EventArgs e) { if (number1 == 0) { number1 = Convert.ToDouble(txtDisplay.Text); op = "+"; } else { number2 = Convert.ToDouble(txtDisplay.Text); op = "+"; } txtDisplay.Text = ""; } private void btnSubtract_Click(object sender, EventArgs e) { if (number1 == 0) { number1 = Convert.ToDouble(txtDisplay.Text); op = "-"; } else { number2 = Convert.ToDouble(txtDisplay.Text); op = "-"; } txtDisplay.Text = ""; } private void btnMultiply_Click(object sender, EventArgs e) { if (number1 == 0) { number1 = Convert.ToDouble(txtDisplay.Text); op = "*"; } else { number2 = Convert.ToDouble(txtDisplay.Text); op = "*"; } txtDisplay.Text = ""; } private void btnDivide_Click(object sender, EventArgs e) { if (number1 == 0) { number1 = Convert.ToDouble(txtDisplay.Text); op = "/"; } else { number2 = Convert.ToDouble(txtDisplay.Text); op = "/"; } txtDisplay.Text = ""; } private void btnResult_Click(object sender, EventArgs e) { if (number1 == 0) { number1 = Convert.ToDouble(txtDisplay.Text); } else { number2 = Convert.ToDouble(txtDisplay.Text); } double _resultAsDouble; String _resultAsString; switch (op) { case "+": { _resultAsDouble = number1 + number2; _resultAsString = _resultAsDouble.ToString(); txtDisplay.Text = _resultAsString; break; } case "-": { _resultAsDouble = number1 - number2; _resultAsString = _resultAsDouble.ToString(); txtDisplay.Text = _resultAsString; break; } case "*": { _resultAsDouble = number1 * number2; _resultAsString = _resultAsDouble.ToString(); txtDisplay.Text = _resultAsString; break; } case "/": { _resultAsDouble = number1 + number2; _resultAsString = _resultAsDouble.ToString(); txtDisplay.Text = _resultAsString; break; } } number1 = 0; number2 = 0; op = ""; } private double number1 = 0; private double number2 = 0; private short digitsOnDisplay = 0; private const short Max_Digits_On_Display = 15; private String op; private void btnClearAll_Click(object sender, EventArgs e) { txtDisplay.Text = ""; number1 = 0; number2 = 0; op = ""; } } }
this.btn1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.btn1_KeyPress); private void btn1_KeyPress(object sender, KeyPressEventArgs e) { if(e.KeyChar()=='1') { //ur code } }
var
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