Boolean variable Help

[Nilou]

Hi,

I'm writing a form to get numbers in order to calculate the price. if numbers and the code of business is wrong it will give me message box error.
The result will appear on a rich text box.
My professor wants me to set declare separate string variables to displaying text in the richtextbox.
MY QUESTION :For Boolean variable, assign false to Boolean variable, when user input is invalid. Display results in the richtextbox, when Boolean is true, BUT IF IT IS FALSE : don't display the result.
My out put doesn't calculate the function and don't know how to set the Boolean to not display the output!!

Please help!

Here is my Code:

'Declare variables to store the output
        Dim strOutOffice As String = "Microsoft Office Pro 2010:" & decTotalOffice.ToString("c")
        Dim strOutVisual As String = "Microsoft Visual Sudio Pro 2010:" & decTotalVS.ToString("c")
        Dim strOutQuick As String = "Intuit Quick Books 2012:" & decTotalQuick.ToString("c")
        Dim strOutMaker As String = "File Maker Pro 2011:" & decTotalMaker.ToString("c")
        Dim strGrandTotal As String = "Grand Total:" & decGrandTotal.ToString("c")
 
Dim blnAnswer As Boolean = True      'Declare a boolean as true
 
 
Process------
.
.
.
 
'Output ---------------------------------------
        rtbSalesOrder.Clear()
        rtbSalesOrder.AppendText(strOutOffice & vbNewLine)
        rtbSalesOrder.AppendText(strOutVisual & vbNewLine)
        rtbSalesOrder.AppendText(strOutQuick & vbNewLine)
        rtbSalesOrder.AppendText(strOutMaker & vbNewLine)
        rtbSalesOrder.AppendText(strGrandTotal & vbNewLine)

[Frinavale]

So, where is your if statement checking to see if the boolean is true.
It's pretty simple to say:

Dim myBoolean As Boolean
'.......
If myBoolean = True Then
  'do something
Else
  'do something else...
End If

-Frinny

[Nilou]

Thank you Frinavale,

what would be my Boolean not display the answer in the text box? Do i have to use rtbSalesOrder.Clear()
or there is something else to not to display the output in richTextbox?

is this correct:

strOutOffice = "Microsoft Office Pro 2010:" & decTotalOffice.ToString("c") & vbNewLine
 
 
        If blnAnswer = True Then
 
            rtbSalesOrder.AppendText(strOutOffice)
        Else
            rtbSalesOrder.Clear()
        End If

[Frinavale]

It's not my project so I'm not sure what you're supposed to display in the TextBox.

According to what you previously posted, I would say that if false then you need to clear the TextBox because you don't want to show anything....

-Frinny

[Nilou]

Here is my Code:

strOutOffice = "Microsoft Office Pro 2010:" & decTotalOffice.ToString("c") & vbNewLine
 
 
If blnAnswer = True Then
  rtbSalesOrder.AppendText(strOutOffice)
Else
  rtbSalesOrder.Clear()
End If

( if it is right, i's not working :(

[Frinavale]

What about it is not working ?

[Nilou]

no it is not :(((
here is he whole code:

Public Class SoftwareSales
 
 
    Private Sub btnCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalc.Click
        'Declaration --------------------------
 
        'Declare constants for retail Price
        Const decOffice As Decimal = 500
        Const decVisual As Decimal = 800
        Const decQuick As Decimal = 230
        Const decMaker As Decimal = 300
 
        'Declare variables to store the quantities sold
        Dim shoMsOffice As Short
        Dim shoMsVs As Short
        Dim shoMsQuick As Short
        Dim shoMsMaker As Short
 
        'Declare variables to store the total cost 
        Dim decTotalOffice As Decimal
        Dim decTotalVS As Decimal
        Dim decTotalQuick As Decimal
        Dim decTotalMaker As Decimal
        Dim decGrandTotal As Decimal
 
        Dim strMsBizType As String  'Declare a variable to store business type
 
        'Declare variables to store the applied discount 
        Dim intDisMsOffice As Integer = 1
        Dim intDisMsVs As Integer = 1
        Dim intDisMsQuick As Integer = 1
        Dim intDisMaker As Integer = 1
 
        Dim blnAnswer As Boolean = True      'Declare a boolean as true
 
        'Declare variables to store the output
        Dim strOutOffice As String
        Dim strOutVisual As String
        Dim strOutQuick As String
        Dim strOutMaker As String
        Dim strGrandTotal As String
 
 
 
 
        'Input ----------------------------
 
        strMsBizType = txtBizType.Text
        strMsBizType = strMsBizType.ToUpper
 
        If strMsBizType = "B" Or strMsBizType = "b" Or strMsBizType = "A" Or strMsBizType = "a" Or strMsBizType = "N" Or strMsBizType = "n" Then
            blnAnswer = True
        Else
            MsgBox("Please enter B,A, or N for business type.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
 
        End If
 
 
 
        'strOutOffice = "Microsoft Office Pro 2010:" & decTotalOffice.ToString("c") & vbNewLine
        'rtbSalesOrder.AppendText(strOutOffice)
 
 
 
 
        If IsNumeric(txtMsOffice.Text) And txtMsOffice.Text > 0 Then
            shoMsOffice = txtMsOffice.Text
        Else
            MsgBox("Please enter number of quantities sold for Microsoft Office Pro 2010.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
 
        If IsNumeric(txtMsVs.Text) And txtMsVs.Text > 0 Then
            shoMsVs = txtMsVs.Text
        Else
            MsgBox("Please enter number of quantities sold for Microsoft Visual Studio Pro 2010.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
        If IsNumeric(txtMsQuick.Text) And txtMsQuick.Text > 0 Then
            shoMsQuick = txtMsQuick.Text
        Else
            MsgBox("Please enter number of quantities sold for Intuit Quick Books 2012.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
        If IsNumeric(txtMsMaker.Text) And txtMsMaker.Text > 0 Then
            shoMsMaker = txtMsMaker.Text
        Else
            MsgBox("Please enter number of quantities sold for File Maker Pro 2011.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
 
        'Process -------------------------------------
 
 
.
.
.
 
        'Output ---------------------------------------
 
        rtbSalesOrder.Clear()
 
        strOutOffice = "Microsoft Office Pro 2010:" & decTotalOffice.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutOffice)
        Else
            rtbSalesOrder.Clear(strOutOffice)
        End If
 
        strOutVisual = "Microsoft Visual Sudio Pro 2010:" & decTotalVS.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutVisual)
        Else
            rtbSalesOrder.Clear(strOutVisual)
        End If
 
 
        strOutQuick = "Intuit Quick Books 2012:" & decTotalQuick.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutQuick)
        Else
            rtbSalesOrder.Clear(strOutQuick)
        End If
 
        strOutMaker = "File Maker Pro 2011:" & decTotalMaker.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutMaker)
        Else
            rtbSalesOrder.Clear(strOutMaker)
        End If
 
 
        strGrandTotal = "Grand Total:" & decGrandTotal.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strGrandTotal)
        Else
            rtbSalesOrder.Clear(strGrandTotal)
        End If
 
        'rtbSalesOrder.Clear()
        'rtbSalesOrder.AppendText("Microsoft Office Pro 2010:" & strOutOffice & vbNewLine)
        'rtbSalesOrder.AppendText("Microsoft Visual Sudio Pro 2010:" & strOutVisual & vbNewLine)
        'rtbSalesOrder.AppendText("Intuit Quick Books 2012:" & strOutQuick & vbNewLine)
        'rtbSalesOrder.AppendText("File Maker Pro 2011:" & strOutMaker & vbNewLine)
        'rtbSalesOrder.AppendText("Grand Total:" & strGrandTotal & vbNewLine)
 
    End Sub
 
    Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
        'Clear UserInput & and assign default values
        txtMsOffice.Text = 0
        txtMsVs.Text = 0
        txtMsQuick.Text = 0
        txtMsMaker.Text = 0
        txtBizType.Text = "B"
        rtbSalesOrder.Clear()
 
        txtMsOffice.Focus()      ' Reset the focus.
    End Sub
 
    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        End
    End Sub
End Class

[Nilou]

This one has the process too:

Public Class SoftwareSales
 
 
    Private Sub btnCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalc.Click
        'Declaration --------------------------
 
        'Declare constants for retail Price
        Const decOffice As Decimal = 500
        Const decVisual As Decimal = 800
        Const decQuick As Decimal = 230
        Const decMaker As Decimal = 300
 
        'Declare variables to store the quantities sold
        Dim shoMsOffice As Short
        Dim shoMsVs As Short
        Dim shoMsQuick As Short
        Dim shoMsMaker As Short
 
        'Declare variables to store the total cost 
        Dim decTotalOffice As Decimal
        Dim decTotalVS As Decimal
        Dim decTotalQuick As Decimal
        Dim decTotalMaker As Decimal
        Dim decGrandTotal As Decimal
 
        Dim strMsBizType As String  'Declare a variable to store business type
 
        'Declare variables to store the applied discount 
        Dim intDisMsOffice As Integer = 1
        Dim intDisMsVs As Integer = 1
        Dim intDisMsQuick As Integer = 1
        Dim intDisMaker As Integer = 1
 
        Dim blnAnswer As Boolean = True      'Declare a boolean as true
 
        'Declare variables to store the output
        Dim strOutOffice As String
        Dim strOutVisual As String
        Dim strOutQuick As String
        Dim strOutMaker As String
        Dim strGrandTotal As String
 
 
 
 
        'Input ----------------------------
 
        strMsBizType = txtBizType.Text
        strMsBizType = strMsBizType.ToUpper
 
        If strMsBizType = "B" Or strMsBizType = "b" Or strMsBizType = "A" Or strMsBizType = "a" Or strMsBizType = "N" Or strMsBizType = "n" Then
            blnAnswer = True
        Else
            MsgBox("Please enter B,A, or N for business type.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
 
        End If
 
 
 
        'strOutOffice = "Microsoft Office Pro 2010:" & decTotalOffice.ToString("c") & vbNewLine
        'rtbSalesOrder.AppendText(strOutOffice)
 
 
 
 
        If IsNumeric(txtMsOffice.Text) And txtMsOffice.Text > 0 Then
            shoMsOffice = txtMsOffice.Text
        Else
            MsgBox("Please enter number of quantities sold for Microsoft Office Pro 2010.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
 
        If IsNumeric(txtMsVs.Text) And txtMsVs.Text > 0 Then
            shoMsVs = txtMsVs.Text
        Else
            MsgBox("Please enter number of quantities sold for Microsoft Visual Studio Pro 2010.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
        If IsNumeric(txtMsQuick.Text) And txtMsQuick.Text > 0 Then
            shoMsQuick = txtMsQuick.Text
        Else
            MsgBox("Please enter number of quantities sold for Intuit Quick Books 2012.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
        If IsNumeric(txtMsMaker.Text) And txtMsMaker.Text > 0 Then
            shoMsMaker = txtMsMaker.Text
        Else
            MsgBox("Please enter number of quantities sold for File Maker Pro 2011.", MsgBoxStyle.OkOnly + vbCritical, "Data Entry Error")
        End If
 
 
        'Process -------------------------------------
 
        'Discount table for Regular Business 
        If strMsBizType = "B" Or strMsBizType = "b" Then
            decTotalOffice = decOffice * shoMsOffice
            decTotalVS = decVisual * shoMsVs
            decTotalQuick = decQuick * shoMsQuick
            decTotalMaker = decMaker * shoMsMaker
        End If
 
        'Discount table for Academic
        If strMsBizType = "A" Or strMsBizType = "a" Then
 
            If (shoMsOffice = shoMsVs = shoMsQuick = shoMsMaker) <= 10 Then
                decTotalOffice = shoMsOffice * decOffice
                decTotalVS = decVisual * shoMsVs
                decTotalQuick = decQuick * shoMsQuick
                decTotalMaker = decMaker * shoMsMaker
 
                Select Case shoMsOffice
                    Case 10 To 19
                        intDisMsOffice = (shoMsOffice * decOffice) * 0.25
                        decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
 
                        Select Case shoMsVs
                            Case 10 To 19
 
                                intDisMsVs = (shoMsVs * decVisual) * 0.25
                                decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                                Select Case shoMsQuick
                                    Case 10 To 19
                                        intDisMsQuick = (shoMsQuick * decQuick) * 0.05
                                        decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                                        Select Case shoMsMaker
                                            Case 10 To 19
                                                intDisMaker = (shoMsMaker * decMaker) * 0.05
                                                decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                                        End Select
                                End Select
                        End Select
                End Select
 
                Select Case shoMsOffice
                    Case 20 To 49
                        intDisMsOffice = (shoMsOffice * decOffice) * 0.35
                        decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
                        Select Case shoMsVs
 
                        End Select
                    Case 20 To 49
                        intDisMsVs = (shoMsVs * decVisual) * 0.35
                        decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                        Select Case shoMsQuick
                            Case 20 To 49
                                intDisMsQuick = (shoMsQuick * decQuick) * 0.1
                                decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                                Select Case shoMsMaker
                                    Case 20 To 49
                                        intDisMaker = (shoMsMaker * decMaker) * 0.15
                                        decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                                End Select
                        End Select
                End Select
 
                Select Case shoMsOffice
                    Case 50 To 99
                        intDisMsOffice = (shoMsOffice * decOffice) * 0.5
                        decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
 
                        Select Case shoMsVs
                            Case 50 To 99
                                intDisMsVs = (shoMsVs * decVisual) * 0.5
                                decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                                Select Case shoMsQuick
                                    Case 50 To 99
                                        intDisMsQuick = (shoMsQuick * decQuick) * 0.15
                                        decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                                        Select Case shoMsMaker
                                            Case 50 To 99
                                                intDisMaker = (shoMsMaker * decMaker) * 0.25
                                                decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                                        End Select
                                End Select
                        End Select
                End Select
 
                Select Case shoMsOffice
                    Case Is >= 100
                        intDisMsOffice = (shoMsOffice * decOffice) * 0.75
                        decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
 
                        Select Case shoMsVs
                            Case Is >= 100
                                intDisMsVs = (shoMsVs * decVisual) * 0.75
                                decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                                Select Case shoMsQuick
                                    Case Is >= 100
                                        intDisMsQuick = (shoMsQuick * decQuick) * 0.25
                                        decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                                        Select Case shoMsMaker
                                            Case Is >= 100
                                                intDisMaker = (shoMsMaker * decMaker) * 0.4
                                                decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                                        End Select
                                End Select
                        End Select
                End Select
            End If
        End If
 
 
        'Discount table for NonProfit Organizations
        If strMsBizType = "N" Or strMsBizType = "n" Then
 
            If (shoMsOffice = shoMsVs = shoMsQuick = shoMsMaker) <= 10 Then
                decTotalOffice = shoMsOffice * decOffice
                decTotalVS = decVisual * shoMsVs
                decTotalQuick = decQuick * shoMsQuick
                decTotalMaker = decMaker * shoMsMaker
            End If
 
            Select Case shoMsOffice
                Case 10 To 19
                    intDisMsOffice = (shoMsOffice * decOffice) * 0.25
                    decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
 
                    Select Case shoMsVs
                        Case 10 To 19
 
                            intDisMsVs = (shoMsVs * decVisual) * 0.25
                            decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                            Select Case shoMsQuick
                                Case 10 To 19
                                    intDisMsQuick = (shoMsQuick * decQuick) * 0.1
                                    decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                                    Select Case shoMsMaker
                                        Case 10 To 19
                                            intDisMaker = (shoMsMaker * decMaker) * 10
                                            decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                                    End Select
                            End Select
                    End Select
            End Select
 
            Select Case shoMsOffice
                Case 20 To 49
                    intDisMsOffice = (shoMsOffice * decOffice) * 0.35
                    decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
                    Select Case shoMsVs
 
                    End Select
                Case 20 To 49
                    intDisMsVs = (shoMsVs * decVisual) * 0.35
                    decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                    Select Case shoMsQuick
                        Case 20 To 49
                            intDisMsQuick = (shoMsQuick * decQuick) * 0.25
                            decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                            Select Case shoMsMaker
                                Case 20 To 49
                                    intDisMaker = (shoMsMaker * decMaker) * 0.15
                                    decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                            End Select
                    End Select
            End Select
 
            Select Case shoMsOffice
                Case 50 To 99
                    intDisMsOffice = (shoMsOffice * decOffice) * 0.45
                    decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
 
                    Select Case shoMsVs
                        Case 50 To 99
                            intDisMsVs = (shoMsVs * decVisual) * 0.45
                            decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                            Select Case shoMsQuick
                                Case 50 To 99
                                    intDisMsQuick = (shoMsQuick * decQuick) * 0.4
                                    decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                                    Select Case shoMsMaker
                                        Case 50 To 99
                                            intDisMaker = (shoMsMaker * decMaker) * 0.2
                                            decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                                    End Select
                            End Select
                    End Select
            End Select
 
            Select Case shoMsOffice
                Case Is >= 100
                    intDisMsOffice = (shoMsOffice * decOffice) * 0.6
                    decTotalOffice = (shoMsOffice * decOffice) - intDisMsOffice
 
                    Select Case shoMsVs
                        Case Is >= 100
                            intDisMsVs = (shoMsVs * decVisual) * 0.6
                            decTotalVS = (shoMsVs * decVisual) - intDisMsVs
 
                            Select Case shoMsQuick
                                Case Is >= 100
                                    intDisMsQuick = (shoMsQuick * decQuick) * 0.5
                                    decTotalQuick = (shoMsQuick * decQuick) - intDisMsQuick
 
                                    Select Case shoMsMaker
                                        Case Is >= 100
                                            intDisMaker = (shoMsMaker * decMaker) * 0.25
                                            decTotalMaker = (shoMsMaker * decMaker) - intDisMaker
                                    End Select
                            End Select
                    End Select
            End Select
        End If
 
 
 
        decGrandTotal = decTotalOffice + decTotalVS + decTotalQuick + decTotalMaker
 
        'Output ---------------------------------------
 
        rtbSalesOrder.Clear()
 
        strOutOffice = "Microsoft Office Pro 2010:" & decTotalOffice.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutOffice)
        Else
            rtbSalesOrder.Clear(strOutOffice)
        End If
 
        strOutVisual = "Microsoft Visual Sudio Pro 2010:" & decTotalVS.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutVisual)
        Else
            rtbSalesOrder.Clear(strOutVisual)
        End If
 
 
        strOutQuick = "Intuit Quick Books 2012:" & decTotalQuick.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutQuick)
        Else
            rtbSalesOrder.Clear(strOutQuick)
        End If
 
        strOutMaker = "File Maker Pro 2011:" & decTotalMaker.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strOutMaker)
        Else
            rtbSalesOrder.Clear(strOutMaker)
        End If
 
 
        strGrandTotal = "Grand Total:" & decGrandTotal.ToString("c") & vbNewLine
        If blnAnswer = True Then
            rtbSalesOrder.AppendText(strGrandTotal)
        Else
            rtbSalesOrder.Clear(strGrandTotal)
        End If
 
        'rtbSalesOrder.Clear()
        'rtbSalesOrder.AppendText("Microsoft Office Pro 2010:" & strOutOffice & vbNewLine)
        'rtbSalesOrder.AppendText("Microsoft Visual Sudio Pro 2010:" & strOutVisual & vbNewLine)
        'rtbSalesOrder.AppendText("Intuit Quick Books 2012:" & strOutQuick & vbNewLine)
        'rtbSalesOrder.AppendText("File Maker Pro 2011:" & strOutMaker & vbNewLine)
        'rtbSalesOrder.AppendText("Grand Total:" & strGrandTotal & vbNewLine)
 
    End Sub
 
    Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
        'Clear UserInput & and assign default values
        txtMsOffice.Text = 0
        txtMsVs.Text = 0
        txtMsQuick.Text = 0
        txtMsMaker.Text = 0
        txtBizType.Text = "B"
        rtbSalesOrder.Clear()
 
        txtMsOffice.Focus()      ' Reset the focus.
    End Sub
 
    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        End
    End Sub
End Class