Justin de Gois Justin de Gois - 1 year ago 68
Vb.net Question

Why is it only displaying one result

This program is supposed to accept in valid candidates for voting, add the names typed in a text box to a list box. In the list box the user may double click on the candidate they choose. After the tally button is clicked a list box displaying the candidates' Names and votes will appear along side the other list box.

My problem is that the lstTallies only displays the last voted candidate.
Below is my code

Public Class Form1
Dim maxVotes As Integer
Dim winner As String
Dim votes() As Integer
Dim index As Integer
Dim candidates As String

Private Sub btnAdd_Click(sender As Object, e As EventArgs) Handles btnAdd.Click
If Not isValidInput(txtNewCandidate.Text) Then
Exit Sub
End If
ReDim Preserve votes(index)
index += 1
End Sub

Private Function isValidInput(ByRef firstName As String) As Boolean
If IsNumeric(txtNewCandidate.Text) Or txtNewCandidate.Text = "" Then
MsgBox("Please input a valid candidate name.")
Return False
Return True
End If
End Function

Private Sub btnTally_Click(sender As Object, e As EventArgs) Handles btnTally.Click
lstTallies.Visible = True
lblTally.Visible = True
lstTallies.Items.Add(lstCandidates.Text & " " & votes(lstCandidates.SelectedIndex))
End Sub

Private Sub lstCandidates_DoubleClick(sender As Object, e As EventArgs) Handles lstCandidates.DoubleClick
If lstCandidates.SelectedIndex = -1 Then
MsgBox("Select a candidate by double-clicking")
End If
votes(lstCandidates.SelectedIndex) += 1
MsgBox("Vote Tallied")
End Sub
End Class

Answer Source

Try this:

Assuming the index of the Candidate and his/her Vote are the same:

  Private Sub btnTally_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnTally.Click
    lstTallies.Visible = True
    lblTally.Visible = True
    For i = 0 To lstCandidates.Items.Count - 1
        lstTallies.Items.Add(lstCandidates.Items(i).ToString & " - " & votes(i))
  End Sub

You cannot get the contents of the ListBox unless you iterate it.

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