Looping Through Text Boxes, i.e. txtNumber1 - txtNumber20

[mojo0716]

I'm in an introductory VB.net class and I have this assignment that has an answer key stored in an array. The assignment is to first draw the GUI, which have already done and I've attached it. Now, I was wondering if there is a way to loop through a bunch of text boxes, like txtNumber1 - txtNumber20. Something like a For Next loop where I could put in x, i.e. txtNumberx and go from 1-20. My instructor is ok, but he is not the best. From what I understand, you could do something like this in VB 6, but not in VB.net? Is this true? Or do I have to type a bunch of lines of code like the following? Thanks.

Public Class frmDriversLicenseExam

    Dim strAnswerKey() As String = {"B", "D", "A", "A", "C", "A", "B", "A", "C", "D", "B", "C", "D", "A", "D", "C", "C", "B", "D", "A"}

    Dim strStudentAnswers(20) As String

    Dim strNumberOne As String = ""
    Dim strNumberTwo As String = ""
    Dim strNumberThree As String = ""
    Dim strNumberFour As String = ""
    Dim strNumberFive As String = ""
    Dim strNumberSix As String = ""
    Dim strNumberSeven As String = ""
    Dim strNumberEight As String = ""
    Dim strNumberNine As String = ""
    Dim strNumberTen As String = ""
    Dim strNumberEleven As String = ""
    Dim strNumberTwelve As String = ""
    Dim strNumberThirteen As String = ""
    Dim strNumberFourteen As String = ""
    Dim strNumberFifteen As String = ""
    Dim strNumberSixteen As String = ""
    Dim strNumberSeventeen As String = ""
    Dim strNumberEighteen As String = ""
    Dim strNumberNineteen As String = ""
    Dim strNumberTwenty As String = ""


    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        Me.Close()
    End Sub

    Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click

    End Sub

    Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click

    End Sub

    Private Sub btnScoreExam_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnScoreExam.Click
        strNumberOne = txtNumber1.Text
        strNumberTwo = txtNumber2.Text
        strNumberThree = txtNumber3.Text
        strNumberFour = txtNumber4.Text
        strNumberFive = txtNumber5.Text
        strNumberSix = txtNumber6.Text
        strNumberSeven = txtNumber7.Text
        strNumberEight = txtNumber8.Text
        strNumberNine = txtNumber9.Text
        strNumberTen = txtNumber10.Text
        strNumberEleven = txtNumber11.Text
        strNumberTwelve = txtNumber12.Text
        strNumberThirteen = txtNumber13.Text
        strNumberFourteen = txtNumber14.Text
        strNumberFifteen = txtNumber15.Text
        strNumberSixteen = txtNumber16.Text
        strNumberSeventeen = txtNumber17.Text
        strNumberEighteen = txtNumber18.Text
        strNumberNineteen = txtNumber19.Text
        strNumberTwenty = txtNumber20.Text
    End Sub

    Sub InputIntoArray()
        strStudentAnswers(0) = strNumberOne
        strStudentAnswers(1) = strNumberTwo
        strStudentAnswers(2) = strNumberThree
        strStudentAnswers(3) = strNumberFour
        strStudentAnswers(4) = strNumberFive
        strStudentAnswers(5) = strNumberOne
        strStudentAnswers(6) = strNumberOne
        strStudentAnswers(7) = strNumberOne
        strStudentAnswers(8) = strNumberOne
        strStudentAnswers(9) = strNumberOne
        strStudentAnswers(10) = strNumberOne
        strStudentAnswers(11) = strNumberOne
        strStudentAnswers(12) = strNumberOne
        strStudentAnswers(13) = strNumberOne
        strStudentAnswers(14) = strNumberOne
        strStudentAnswers(15) = strNumberOne
        strStudentAnswers(16) = strNumberOne
        strStudentAnswers(17) = strNumberOne
        strStudentAnswers(18) = strNumberOne
        strStudentAnswers(19) = strNumberOne
    End Sub
End Class

[kleinma]

well there are no control arrays in VB.NET as there was in VB6, however you can simply just create an array of textboxes and assign your forms textboxes to that array, which you can loop through.

The other option is to loop the array of controls on the form using me.controls, however this will loop ALL controls on the form, and they arent in the order they appear on the form.

[mojo0716]

well there are no control arrays in VB.NET as there was in VB6, however you can simply just create an array of textboxes and assign your forms textboxes to that array, which you can loop through.

The other option is to loop the array of controls on the form using me.controls, however this will loop ALL controls on the form, and they arent in the order they appear on the form.

Can you please give me some example code?

Thanks

[kleinma]

here is a small example app with 8 textboxes. clicking the button will loop them all and show a messagebox with their contents...

this example should give you all you need.