simple textbox question.

[lOnEr]

halu..im very new in this thing..
i have a form w/ corresponding textbox and a button...
i'll make a keydown event in the form..
and user input a value in the textbox and pressing "enter" a string will hold the value..
what i want is..when the user press the "esc" while editing in the textbox the previous value will appear in the textbox...

kinda mapping the undo.

tanx in advance and more power..

 

[ayan]

something like this?

    Dim s 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
 		 Try
 			TextBox1.Text = s.Pop()
 		 Catch ex As Exception
 			MessageBox.Show(ex.Message)
 		 End Try
 	  End If
 	  If e.KeyCode = Keys.Enter Then
 		 s.Push(TextBox1.Text)
 	  End If
    End Sub
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 	  s.Push(TextBox1.Text)
    End Sub

 

[lOnEr]

thanx ayan it really works..

 

[lOnEr]

what if the user dont press enter?
how to do it in keypress event?

thanks in advance..

 

[ayan]

you mean on textchanged event? every changes in textbox is pushed to the stack. try putting the s.push(blah) to textbox_textchanged event. is that what you mean?

 

[lOnEr]

you mean on textchanged event? every changes in textbox is pushed to the stack. try putting the s.push(blah) to textbox_textchanged event. is that what you mean?

ok i will try it sooner..

thanks...more power

 

[.paul.]

to undo text in a text box, declate a form level variable - txtPrev
set it to initial text. then reset it to each new change in the textbox1 change event.
if esc is pressed you can set textbox1.text = txtPrev