Create Your Own Calculator Tutorial Part 1 - C Sharp Visual Studio 2008

This is part 1 of my second tutorial.

In this tutorial I will show you how to create your very own calculator similar to the windows calculator. Not only will you make a useful program but learn a lot of things that C# can do.

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[NikitaKaramov]

Hey there! I think it was 13 years ago when I first found this video. I was a young kid who wanted to learn programming, and this calculator was the first ever thing I've coded. Now, I am a software developer, and I can't imagine a life without coding :D So, this video kinda changed my life, so thank you so, so much for it!

[trieye]

You can use += in visual c#. As for the keys, you need to use the key events to get the pressed keypad number or any other key for that matter.

[DeeGeeDeFi]

Nice work! Came here, searching on how to make a simple forms calculator using VS... I have two text boxes that I use as my input boxes, and a button that adds them, displaying the result in a 'label' field. as you explained, just adding numbers takes some work!
private void button1_Click ( object sender, EventArgs e )
{
decimal ans = Convert.ToDecimal ( textBox1.Text ) + Convert.ToDecimal ( textBox2.Text );
answer.Text = Convert.ToString ( ans );
}

[bluesdave]

Really excellent stuff, just a few comments and one questions. Comments first.
- building the form can be complicated, maybe show how to do it.
- there's no '0'. Programming it is harder then other numbers.
- Your voice should be louder and you sound like you're medicated.
Question
- Why don't the keys in the keypad show the numbers the same way the windows calc does?
- In the command prompt version of c# you can do +=, (like a = a + b), but you can't here. What up with that?

[puscasm]

Thanks a lot!
I always wanted a calculator tutorial in C#.

[TheMrTrapatony]

just a little tip, when you need to add something to a (i'm not sure how it called, like int or textBox1.text in this example ) instead of writing it twice (textbox = textbox +)
just write += it is the same and it sortens your work [ textbox.text += ("1") ; ]

[AliAhmed-plpt]

Thanks, , , man You are actually amazing, u Solved all of my alot once please i am new in windows Form Apps, , , can please upload Lessons from the basic of C#, please upload Ur C# tutorials, ,i will be very thankfull.

[conchig]

This video tutorial is awesome, it works!!

How can I add to this calculator the functions, sin, cos, tan and mod?

[trieye]

catch the exception using "try-catch", for example:

equals_button_click()
{
try
{ // math operation
catch (Exception ex)
{ textBox1.text = ex.Message; }
}
this way it'll just show the error message on the text box without the program crashing.

[alicjab.]

try to write ", " (comma) instead of "." in method: private void Decimal_Click(object sender, EventArgs e).
I think it's working now :)

[ivo]

@QuackWare
Fixed this as well
in vb2008 express you have to write the following code above ur scrip":
"dim dec as decimal"

[RavinduM]

thanx a lot QuackWare..Much needed one for me..cheers..:D

[hafizfalul]

hi, great vid ! thank u ! when i press the decimal button, " System.Windows.Forms.TextBox, Text: ." this text is coming do you kw y ? plz help new to c sharp. thanks in advance.

[QuackWare]

@navjot1331

For sin, cos, tan there are built in C# functions, Math.Sin() Math.Cos() Math.Tan()

For the multilines you would have to mess around with the textbox properties, I don't know how to do this off the top of my head.

[ivo]

Hello, this tutorial is really helpful, but I am using the vb2008 express edition and i can't do the + button, the bool feature doesnt exists. Any help please?

[wikoo]

why my program does not work? I've followed all your instructions.. btw, mine is VS 2005. does it affects the program?

[navjotsingh]

hey what if i wanna add a sin, cos, tan etc. to my calculator
and also want a textbox to be multiline upper line shows the expression and lower line shows current value that is

[CBoozer]

Do we need to make variables to operate more than 2 numbers? Please let me know

[AtanasovPetar]

You can put "!" on the decimal point and delete that else.If ! have decimal point

[raheelbutt]

Thanks a lot man! it helps me greatly.