How can i allow functionality of my calculator program for t

How can i allow functionality of my calculator program for the add/subtract/multiply/division and the enter keypress. See my code below. I highlighted area in bold as a refence to see if I am on the right track. Thank you

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 Calculator
{
public partial class Form1 : Form
{
private String calculatedNumber; // Stores numbers in string form
private Boolean dot = false; // Falg: to control when a dot can be placed in a number
public Form1()
{
InitializeComponent();
}

private void BtnZero_Click(object sender, EventArgs e) //adds 0 to string
{
calculatedNumber += \"0\";
LblDisplay.Text=calculatedNumber;
}

private void BtnOne_Click(object sender, EventArgs e) //adds 1 to string
{
calculatedNumber += \"1\";
LblDisplay.Text = calculatedNumber;
}

private void BtnTwo_Click(object sender, EventArgs e) //adds 2 to string
{
calculatedNumber += \"2\";
LblDisplay.Text = calculatedNumber;
}

private void BtnThree_Click(object sender, EventArgs e) //adds 3 to string
{
calculatedNumber += \"3\";
LblDisplay.Text = calculatedNumber;
}

private void BtnFour_Click(object sender, EventArgs e) //adds 4 to string
{
calculatedNumber += \"4\";
LblDisplay.Text = calculatedNumber;
}
private void button5_Click(object sender, EventArgs e) //adds 5 to string
{
calculatedNumber += \"5\";
LblDisplay.Text = calculatedNumber;
}
private void BtnSix_Click(object sender, EventArgs e) //adds 6 to string
{
calculatedNumber += \"6\";
LblDisplay.Text = calculatedNumber;
}

private void BtnSeven_Click(object sender, EventArgs e) //adds 7 to string
{
calculatedNumber += \"7\";
LblDisplay.Text = calculatedNumber;
}

private void BtnEight_Click(object sender, EventArgs e) //adds 8 to string
{
calculatedNumber += \"8\";
LblDisplay.Text = calculatedNumber;
}

private void BtnNine_Click(object sender, EventArgs e) //adds 9 to string
{
calculatedNumber += \"9\";
LblDisplay.Text = calculatedNumber;
}

private void BtnDot_Click(object sender, EventArgs e) //adds . to string
{
if (!dot)
{
calculatedNumber += \".\";
dot = true;
}

LblDisplay.Text = calculatedNumber;
}

private void BtnAdd_Click(object sender, EventArgs e)
{
//addition button
}

private void BtnSub_Click(object sender, EventArgs e)
{
//subtraction button
}

private void BtnDiv_Click(object sender, EventArgs e)
{
//divide button
}
private void button15_Click(object sender, EventArgs e)
{
//multiply button
}

private void BtnEqt_Click(object sender, EventArgs e)
{
//equals button
}

private void BtnClear_Click(object sender, EventArgs e) //resets the string to blank
{
calculatedNumber = \"\";
LblDisplay.Text = calculatedNumber;
dot = false;
}

private void BtnBack_Click(object sender, EventArgs e)
{
// reset dot if removed
if (!LblDisplay.Text.Equals(\"\"))
{
//if most right char is a . (dot) then reset flag
if ((LblDisplay.Text.ToString())[LblDisplay.Text.Length-1] == \'.\')
dot = false;
// go ahead and remove last char
LblDisplay.Text = calculatedNumber = LblDisplay.Text.Remove(LblDisplay.Text.Length - 1);
}
}

private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
  
if (Char.IsDigit(e.KeyChar))

{
LblDisplay.Text += e.KeyChar.ToString();
}
else
{
e.Handled = true;
}

}

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
//LblDisplay.Text += e.KeyCode.ToString();
}

private void Form1_Load(object sender, EventArgs e)
{
this.KeyPreview = true;
}

private void BTNAdd(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)Keys.Add)
{
LblDisplay.Text += e.KeyChar.ToString();
}
else
{
e.Handled = true;
}

}
}
}

Solution

Hi,
c# provide keypress event handlers for all keys, so all we have to to do is match it with corresponding key, like in this case, we want to match enter, then we can use it like below

private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{

}
there is one more way we can do this,
keypress events have the event handlers defined for return when enter, you can use that too, choose according to your need

Please Thumbs up if this was helpful, otherwise let me know in comments