textbox value..

[LoNeR]

hi to everyone..im very new in this thing
i have a form w/ corresponding textbox.
in the textbox the user input a value and in pressing "enter" the value in textbox will be store in a string..

what i want is when the user press "esc" while editing in textbox it will fill the previous value..
how to do it?

thanks in advance..

[brown monkey]

use a stack

[LoNeR]

Originally posted by brown monkey
use a stack

ok i try it..

tanx for the suggs...

[taxes]

Hi,

I don't think it is quite that simple. Allowing a user access to the ESC key always give rise to problems. It is safer to use Confirm and Cancel buttons, making all other controls.Enabled=False. In the MouseEnter (or possibly TextChanged) event of the Textbox use something like

If bFirst=false then
  othercontrols.enabled=False
  bfirst=True
  strText=Textbox.Text
end if

Then in the click event of the confirm button

bFirst=False
  strText=""
  othercontrols.enabled=True
  btnConfirm.Enabled=False
  btnCancel.Enabled=False

In the click event of the cancel button

bfirst=False
  Textbox.Text=strText
  strText=""
  btnConfirm.Enabled=False
  btnCancel.Enabled=False

bFirst is a form scope boolean and strText is a form scope string

[LoNeR]

tanx for the great idea guys...

more power

[veins]

Well I will tell you the easiest way.
On got focus store the value in a variable called strOld value
Capture the key down event and declare a string strNewvalue store the new value in it.
‘To store values in the strnew variable. Use this code in ‘TextBox1_KeyPress Event
strnew = strnew + e.KeyChar
Now do what ever you want to do you have both the values with you.
On ESc use Old value and on Enter Use New Value.
I bet nothing could be easier than this… J

[taxes]

Hi,

Any idea why I get the message

"KeyChar is not a member of System.EventArgs" ?

[alextyx]

Hi Taxes, I don't know in which part of your code it happens, but it seems to be a request of keychar argument in a keydown or keyup event. In these events you can obtain Keycode, for example but not keychar that is available in keypress event.

[taxes]

Originally posted by alextyx
Hi Taxes, I don't know in which part of your code it happens, but it seems to be a request of keychar argument in a keydown or keyup event. In these events you can obtain Keycode, for example but not keychar that is available in keypress event.

Sorry. I did not make myself clear. I was referring to the post by veins above when he said

"To store values in the strnew variable. Use this code in ‘TextBox1_KeyPress Event
strnew = strnew + e.KeyChar"

I did not like to say he could not do that as it might have been something I was missing.

So let's get back to veins' post.

Firstly, you can't do it like that for two reasons;

1. As above, KeyChar is not available.

2. Even if you use KeyPress you cannot use it as if the operator makes an error and uses a backspacedelete, you will have an unintelligible character.

What you can do is use

strNew = TextBox1.Text

but only in the KeyUp event. If you use it in the KeyDown or KeyPress event strNew will be 1 character in arrears.

Thanks alextyx.

[alextyx]

Nothing Taxes
Dear Loner, if you only want to store the value in Textbox1 when press Enter and to recover it when press Esc, you can try this:

  Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
        Static Copiatesto As String
        If e.KeyCode = Keys.Enter Then
            Copiatesto = TextBox1.Text
        End If
        If e.KeyCode = Keys.Escape Then
            Me.TextBox1.Text = Copiatesto
        End If
    End Sub

If you need something different....try to explain it to me once again

[LoNeR]

thanks alex...
but it only store the last value inputed in the textbox..
what i want is all the value inputed will retrieve every time the user press "esc".

thanks in advance and more power..

[brown monkey]

stack is what you are finding... everytime you hit enter, push it and everytime you hit escape, pop it.

[LoNeR]

Originally posted by brown monkey
stack is what you are finding... everytime you hit enter, push it and everytime you hit escape, pop it.

thank you BM and the rest of the guys..
i already got it by using stack.

Dim x As New Stack()
    Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
        If e.KeyCode = Keys.Escape Then
            TextBox1.Text = x.Pop
        End If
        If e.KeyCode = Keys.Enter Then
            x.Push(TextBox1.Text)
            TextBox1.Text = ""
        End If
    End Sub

thanks and more power