All arithmatic operations

Question

0.00/5 (No votes)

See more:

good morning,

i have three textboxes for firstnumber,secondnumber and result.

I have 4 buttons addition,subtraction,multiplication and division.

if i enter firstnumber and secondnumber and press on any button the result should be displayed on the result textbox.

i.e. if i enter 4 in first textbox and 4 in second textbox and click on add button the result of 8 should be displayed on result textbox.

i am giving my code

C#

protected void Page_Load(object sender, EventArgs e)
   {
   }
   protected void btnadd_Click(object sender, EventArgs e)
   {
       txtresult.Text = (txtfirstnumber.Text) + (txtsecondnumber.Text);
   }
   protected void btnsubtraction_Click(object sender, EventArgs e)
   {
       txtresult.Text = (txtfirstnumber.Text) - (txtsecondnumber.Text);
   }
   protected void btnmultiplication_Click(object sender, EventArgs e)
   {
       txtresult.Text = (txtfirstnumber.Text) * (txtsecondnumber.Text);
   }
   protected void btndivision_Click(object sender, EventArgs e)
   {
       txtresult.Text = (txtfirstnumber.Text) * (txtsecondnumber.Text);
   }

please help me.

thank you.

Posted 26-Mar-13 19:56pm

Member 9567873

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

_Maxxx_ · Answer 1 · 2013-03-26T20:35:00

The Text property of a TextBox is a string - so adding them together doesn't work ("4" + "4" = "44")

So you need to convert the string to a number.

Lets assume you are using integers.

you can do

C#

int number1, number2;
if (int.TryParse(txtFirstNumnebr.Text, out number1) && (int.TryParse(txtSecondNumber.Text, out number2))
{
    int result = number1 + number2;

    txtresult.Text  = result.ToString();
}

int.TryParse attempts to convert teh string to an integer, returning false if it fails, or true if it works, and puts the result in the out parameter (number1 or number2)

I've shown an 'ADD' example - the same would need to be done for all the other operations too

Of course you could vastly improve on that by adding validation first, with error messages etc. - but at the level I am guessing you are at from your question, this should get you started.

Albert Nizamutdinov · Answer 2 · 2013-03-26T20:33:00

Solution 1

txtfirstnumber.Text is System.String.
For arithmatic use Convert.ToDouble(somestring) or double.TryParse(somestring, out value). Or eny other types need you.

Posted 26-Mar-13 20:33pm

Albert Nizamutdinov