Calculator's back space does not work

Question

2.67/5 (3 votes)

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I am creating a calculator using c#, I just want that my backspace should work on textBoxes.
I have a button that should performs functionality of backspace.

Posted 27-Mar-11 17:33pm

Bhavna v

Updated 27-Mar-11 18:30pm

v2

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Comments

[no name] 28-Mar-11 0:18am

What do you mean backsapce does not work, would you please clear this

[no name] 28-Mar-11 0:31am

Thats good its easy now..

3 solutions

Solution 1

Backspace character does work on all text boxes unless you handled some event to prevent that.
You need to show a fragment of you code to get further help.

Please see my Answer to your other Question (How to save 2 values in a variable[^]) and thing thoroughly: you need to select much easier coding tasks as you only start programming and still have to learn the very basic idea.

[EDIT] See my separate Answer done after clarification by OP.

—SA

Posted 27-Mar-11 17:44pm

Sergey Alexandrovich Kryukov

Updated 27-Mar-11 19:18pm

v2

Comments

Abhinav S 28-Mar-11 0:35am

Good answer. My 5.

Sergey Alexandrovich Kryukov 28-Mar-11 0:42am

Thank you, Abhinav.
--SA

Solution 2

I hope you are handling backspace using the System.Windows.Forms.Keys.Back keycode.

Posted 27-Mar-11 18:35pm

Abhinav S

Updated 27-Mar-11 18:38pm

v2

Comments

Sergey Alexandrovich Kryukov 28-Mar-11 0:41am

A useful hint, my 5. (I fixed the ID to make it compile, would you mind?).
--SA

Abhinav S 28-Mar-11 0:52am

Oh no not at all. Thanks for the 5.

Sergey Alexandrovich Kryukov 28-Mar-11 0:47am

She accepted the completely incorrect Answer. This is useless...
--SA

m@dhu 28-Mar-11 0:50am

If you could look at her profile and the comments you will know it why?

Sergey Alexandrovich Kryukov 28-Mar-11 0:56am

I did. She and Brijesh work together to mess up most simple things. Being not experienced is one thing, moving in wrong direction is something else... And not listening... Useless, I say...
--SA

Sergey Alexandrovich Kryukov 28-Mar-11 1:15am

I put another Answer, after clarification.
--SA

Abhinav S 28-Mar-11 0:52am

Weird. [doh]

Sergey Alexandrovich Kryukov 28-Mar-11 0:57am

The story is being continuing, unfortunately...
--SA

Sergey Alexandrovich Kryukov 28-Mar-11 1:14am

I had to put another Question, after clarification.
--SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-03-27T19:08:00

Solution 4

Answering a follow-up Question:

This is one of the ways to emulate backspace:

C#

myButton.Click += (sender, eventArgs) => {
    myTextBox.Focus();
    Application.DoEvents();
    SendKeys.Send("{BACKSPACE}");
};

Warning! Avoid using Application.DoEvents for other cases; one common mistake is doing it periodically as a dirty substitute of threading.

A variant without SendKeys:

C#

myButton.Click += (sender, eventArgs) => {
int currentPosition = myTextBox.SelectionStart;
if (currentPosition > 0)
    myTextBox.Text = myTextBox.Text.Remove(currentPosition - 1, 1);
};

—SA

Posted 27-Mar-11 19:08pm

Sergey Alexandrovich Kryukov

Updated 27-Mar-11 19:12pm

v2

Comments

[no name] 28-Mar-11 2:05am

Really Good Sample.
Have My 5

Sergey Alexandrovich Kryukov 28-Mar-11 2:14am

Thank you very much.
Importantly, it provides required functionality.
--SA

Bhavna v 29-Mar-11 1:18am

Thank for solution.

Sergey Alexandrovich Kryukov 29-Mar-11 1:20am

You are welcome.
--SA