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Thread: Code to check all text boxes

  1. #1

    Thread Starter
    Hyperactive Member
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    Code to check all text boxes

    I used code below to check all text boxes but never work.
    All the textboxes directly on the form
    What is wrong? (I want to force user to input data into all text boxes)

    Private Sub ValidateTextBoxes()
    For Each ctrl As Control In Me.Controls
    If TypeOf ctrl Is TextBox Then
    Dim txtBox As TextBox = CType(ctrl, TextBox)
    If txtBox.Text.Length = 0 Then
    MsgBox("All fields are required")
    Exit Sub
    End If
    End If
    Next
    End Sub

    Hi, ChrisE ,
    Your code did not work.

    H, techgnome,
    Yes, All the textboxes directly on the form.

    For unknown reason, I can't post reply. (Company block reply but can use Edit)


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    Last edited by aspfun; Jan 23rd, 2018 at 10:32 AM.

  2. #2
    Frenzied Member ChrisE's Avatar
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    Frankfurt
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    1,296

    Re: Code to check all text boxes

    Hi,

    this will change the Background if the Textbox is empty...

    Code:
     Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
            Call ColorTextboxIfEmpty(Me)
        End Sub
    
        Private Shared Sub ColorTextboxIfEmpty(ByRef frm As System.Windows.Forms.Form)
            For Each ctrl As Control In frm.Controls
                If TypeOf ctrl Is TextBox Then
                    If DirectCast(ctrl, TextBox).Text = String.Empty Then
                        ctrl.BackColor = Color.Tomato
                    End If
                End If
            Next
        End Sub
    regards
    Chris
    to hunt a species to extinction is not logical !
    since 2010 the number of Tigers are rising again in 2016 - 3900 were counted. with Baby Callas it's 3901, my wife and I had 2-3 months the privilege of raising a Baby Tiger.

  3. #3
    PowerPoster techgnome's Avatar
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    Posts
    31,836

    Re: Code to check all text boxes

    Are all the textboxes directly on the form? Or do they reside in containers like a tab page, group box, or something like that? If that's the case, then the problem is that you're only iterating through the form's controls. After checking to see if it's a textbox, if it isn't, you need to check the .Controls property of that control, to see if there are any controls in it, and if so, process that group and so on and so on and on and on.... perfect time to learn about recurrsion.

    -tg
    * I don't respond to private (PM) requests for help. It's not conducive to the general learning of others.*
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  4. #4
    Frenzied Member ChrisE's Avatar
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    Re: Code to check all text boxes

    Quote Originally Posted by aspfun View Post
    [COLOR="#FF0000"]Hi, ChrisE ,
    Your code did not work.
    then the Textbox isn't empty, it should work just fine, add a new Textbox to you form and try it again



    Tg- has a valid point if there are Panels ; Tabpages etc...


    regards
    Chris
    to hunt a species to extinction is not logical !
    since 2010 the number of Tigers are rising again in 2016 - 3900 were counted. with Baby Callas it's 3901, my wife and I had 2-3 months the privilege of raising a Baby Tiger.

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