[jordie91]

i know i can catch errors on a calculator with try and catch

but i dont know wher and how i can combine with this code

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 WindowsFormsApplication4
{
	public partial class Form1 : Form
	{
		public Form1()
		{
			InitializeComponent();
		}

		private void Form1_Load(object sender, EventArgs e)
		{
			

 

		}

		private void button1_Click(object sender, EventArgs e)//hier wordt plus aangemaakt
		{
			float A, B, C;

			A = Convert.ToInt32(textBox1.Text);
			B = Convert.ToInt32(textBox2.Text);
			C = A + B;

			textBox3.Text = C.ToString();
		}

		private void button2_Click(object sender, EventArgs e)/// hier wordt min aangemaakt
		{
			float A, B, C;

			A = Convert.ToInt32(textBox1.Text);
			B = Convert.ToInt32(textBox2.Text);
			C = A - B;

			textBox3.Text = C.ToString();
		}

		private void button3_Click(object sender, EventArgs e)// hier wordt keer aangemaakt
		{
			float A, B, C;

			A = Convert.ToInt32(textBox1.Text);
			B = Convert.ToInt32(textBox2.Text);
			C = A * B;

			textBox3.Text = C.ToString();
		}

		private void button4_Click(object sender, EventArgs e)// hier wordt gedeeld door aangemaakt
		{
			float A, B, C;

			A = Convert.ToInt32(textBox1.Text);
			B = Convert.ToInt32(textBox2.Text);
			C = A /  B;

			textBox3.Text = C.ToString();
		}

		private void button5_Click(object sender, EventArgs e) // hier wordt machten mee aangemaakt
		{
			double A,C;

			A = Convert.ToInt32(textBox1.Text);
			C = Math.Sqrt(A);

			textBox3.Text = C.ToString();
		}

		private void label3_Click(object sender, EventArgs e)
		{
		  
		}

		private void textBox3_TextChanged(object sender, EventArgs e)
		{

		}

		private void button6_Click(object sender, EventArgs e)//macht
		{
			double A,B, C;

			A = Convert.ToInt32(textBox1.Text);
			B = Convert.ToInt32(textBox2.Text);
			C = Math.Pow(A,B);

			textBox3.Text = C.ToString();
		}
	}
}

and i also dont know how to use try and catch

[RudiVisser]

http://msdn.microsof...esw(VS.71).aspx

Wrap try/catch round every button click. You could also assign an unhandled exception handler which will handle everything that you don't.

[noorahmad]

use try catch like this:

try
			{
				//your code here	
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}

[jordie91]

and how do i add a message like "je getal is oneindig " if the number is infinity ?

[noorahmad]

and also change float to decimal

 try
			{
				if ((textBox1.Text == string.Empty) && (textBox2.Text == string.Empty))
				{
					return;
				}
				decimal A, B, C;
				A = Convert.ToDecimal(textBox1.Text);
				B = Convert.ToDecimal(textBox2.Text);

				C = A * B;
				textBox3.Text = C.ToString();

			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}

[jordie91]

now i only have a error if there is nothing in a texbox but i want a message to catch by c=infinity
see code

This post has been edited by jordie91: 16 June 2009 - 04:56 AM

[eclipsed4utoo]

jordie91, on 16 Jun, 2009 - 06:54 AM, said:

now i only have a error if there is nothing in a texbox but i want a message to catch by c=infinity
see code

what do you mean, "catch infinity"? there is no infinity in C#. How are you getting infinity?

[born2c0de]

Quote

what do you mean, "catch infinity"? there is no infinity in C#. How are you getting infinity?

jordie91 is actually referring to the "Divide By Zero" or "Overflow" error.