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vb.net selstart, sellenght

Posted on 2010-11-18
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Last Modified: 2012-05-10
Is there any way to activate the selstart/sellenght for all textbox in form automatically.
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Question by:rflorencio
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9 Comments
 
LVL 26

Expert Comment

by:Shaun Kline
ID: 34166376
You would need to add a javascript function to each textbox's onfocus event to set the selStart and selLength values.
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LVL 86

Expert Comment

by:Mike Tomlinson
ID: 34166385
Can you give more details?

If you want all text to be selected upon entry try something like:
Private Sub TextBox1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.GotFocus
        TextBox1.SelectAll()
    End Sub

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LVL 86

Expert Comment

by:Mike Tomlinson
ID: 34166393
Hmm...WinForms or WebForms?  =D
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LVL 26

Expert Comment

by:Shaun Kline
ID: 34166438
Good point, which is it?
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Author Comment

by:rflorencio
ID: 34166545
Winforms
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Author Comment

by:rflorencio
ID: 34166563
Instead of defining all GotFocus each textbox, I would do it automatically
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LVL 86

Expert Comment

by:Mike Tomlinson
ID: 34166655
Two ways:
(1) Add all of them after the "Handles" clause.
(2) Wire them up at run-time using AddHandler().

In both cases, use the "sender" parameter to determine which box fired the event.

Example of #1 with three TextBoxes:
*You can select all of them on the form, hit the lightning bolt, then select the GotFocus() event to add them all at once*
Private Sub AllTextBoxex_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.GotFocus, TextBox2.GotFocus, TextBox3.GotFocus
        Dim tb As TextBox = CType(sender, TextBox)
        tb.SelectAll()
    End Sub

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LVL 86

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 34166683
Example of #2 using a recursive routine at Form Load():
Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        WireTextBoxFocusEvent(Me)
    End Sub

    Private Sub WireTextBoxFocusEvent(ByVal cont As Control)
        For Each ctl As Control In cont.Controls
            If TypeOf ctl Is TextBox Then
                AddHandler ctl.GotFocus, AddressOf AllTextBoxes_GotFocus
            ElseIf ctl.HasChildren Then
                WireTextBoxFocusEvent(ctl)
            End If
        Next
    End Sub

    Private Sub AllTextBoxes_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim tb As TextBox = CType(sender, TextBox)
        tb.SelectAll()
    End Sub

End Class

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LVL 26

Expert Comment

by:Shaun Kline
ID: 34166686
You can generalize the function so you can use it for all GotFocus functions for all of your textboxes.
Private Sub GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.GotFocus, TextBox2.GotFocus ...
        CType(sender, TextBox).SelectAll()
    End Sub

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