Visual Basic - Calculations across multiple forms
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Thread: Visual Basic - Calculations across multiple forms

  1. #1
    Join Date
    Nov 2013
    Posts
    1

    Cool Visual Basic - Calculations across multiple forms

    Hello,

    I have been trying for days to figure out how to calculate "total revenue" on a new form using a listbox control. Any help would be much appreciated.

    Code:
    'MainForm' displays the form 'AnnualIncome'
        Private Sub mnuCalculateAnnualIncome_Click(sender As System.Object, e As System.EventArgs) Handles mnuCalculateAnnualIncome.Click
    
            'Create an instance of "Annual Income" form
            Dim frmAnnualIncome As New annualIncome
    
            'Dispaly the annual income Form in modeless style
            frmAnnualIncome.Show()
    'AnnualIncome' form then calculates annual income (per region). I have 3 regions. When you select a different region sales are calculated for all products across the entire region and displays results in a listbox. This part works fine.


    Code:
    Private Sub annualIncome_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    
            'Loop to fill in 14 cells
            For lstSalesData As Integer = 0 To 14
                lstIncome.Items.Add("")
            Next
            'Loop to fill in labels with "Ski" and "income"
            For countLabels As Integer = 0 To 1
                lstIncome.Items(countLabels * 8) = strIncomeHeader(countLabels).ToString
            Next
            'Loop to fill in the 5 brands of skis
            For SkiLabels As Integer = 0 To 4
                lstIncome.Items(SkiLabels + 1) = strSkiMake(SkiLabels)
            Next
    
            Dim skiRevenue As Double
            'Calculates and displays total revenue for each Ski Brand
            skiRevenue = MainForm.lstSales.Items(15) * MainForm.lstSales.Items(1)
            lstIncome.Items(9) = skiRevenue
    
            skiRevenue = MainForm.lstSales.Items(31) * MainForm.lstSales.Items(17)
            lstIncome.Items(10) = skiRevenue
    
            skiRevenue = MainForm.lstSales.Items(47) * MainForm.lstSales.Items(33)
            lstIncome.Items(11) = skiRevenue
    
            skiRevenue = MainForm.lstSales.Items(63) * MainForm.lstSales.Items(49)
            lstIncome.Items(12) = skiRevenue
    
            skiRevenue = MainForm.lstSales.Items(79) * MainForm.lstSales.Items(65)
            lstIncome.Items(13) = skiRevenue
    
    
            Dim totalRevenue As Double
            'Calculate total revenue for all products
            totalRevenue = lstIncome.Items(9) + lstIncome.Items(10) + lstIncome.Items(11) + lstIncome.Items(12) + lstIncome.Items(13)
            lblTotal.Text = totalRevenue.ToString("C")
    
        End Sub

    THE THIRD FORM 'totalIncome' should display the total income of each of the 3 regions and then calculate the total of all three regions.

    I have tried something similar to the following but am not having any luck:
    Code:
       Private Sub totalIncome_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    
            'Loop to fill in 8 Cells
    
            For lstSalesData As Integer = 0 To 7
                lstTotalIncome.Items.Add("")
            Next
    
            Dim totalRevRegion As Double
            'Calculate total revenue for all products per region
            totalRevRegion = annualIncome.lblTotal.ToString
            lstTotalIncome.Items(0) = totalRevRegion
    Last edited by GremlinSA; November 22nd, 2013 at 02:29 PM. Reason: added code tags

  2. #2
    Join Date
    Jul 2005
    Posts
    1,075

    Re: Visual Basic - Calculations across multiple forms

    It would be better to move the thread to vb.net
    Last edited by jggtz; November 22nd, 2013 at 03:18 PM.
    JG


    ... If your problem is fixed don't forget to mark your threads as resolved using the Thread Tools menu ...

  3. #3
    DataMiser is offline Super Moderator Power Poster
    Join Date
    Jul 2008
    Location
    WV
    Posts
    4,860

    Re: Visual Basic - Calculations across multiple forms

    Moved to VB.Net section
    Always use [code][/code] tags when posting code.

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