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John And Dave,
I can run the program now. I need to run a Setup.exe file for ActiveToolbars Plus to installs the runtime files.
Thank you very much for your help, very appreciate.
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Hi Every One
Thanks in Advance...
Type mismatch. (Exception from HRESULT: 0x80020005 (DISP_E_TYPEMISMATCH))
i got above error when i working with outlook to add a Folder to Personal Folder which
is a Root directory in outlook
plzz help me if any body worked on outlook
its urgent.....
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I Googled HRESULT: 0x80020005 (DISP_E_TYPEMISMATCH) and got loads of hits, so obviously lots of others have had the same problem.
Give it a try. I'm pretty sure that if you read through them you will find a solution.
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
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Hi, I am newbie here; I hope that I am posting correctly. If not please let me know and I will fix that after this post... So here is my dilemma. Thank you for any help in advance. 
The program loads; I can pick a ticket type and the appropriate seats are listed in lstbox. I can type in how many ticket I want and clear the form. The Calculate cost button appears to do nothing at all. VB editor does not even give me an error; it just doesn't do anything. This was a homework, I have already handed it in though as is, so now I am just looking for guidance on where I went wrong. I don't want to move onto the next subject if I can't understand this one.
Purpose: This application allows the user to unput data about
' the purchase of baseball tickets. Once the data is entered,
' the program will compute the cost of the tickets purchased.
Option Strict On
<pre>Public Class frmBaseBallTicketSales
'Class Variables
Private _decSeasonBoxSeat As Decimal = 2500D
Private _decSeasonLowerSeat As Decimal = 1500D
Private _decSingleBoxSeat As Decimal = 55D
Private _decSingleLowerSeat As Decimal = 35D
Private _decUpperSeat As Decimal = 25D
Private _decStanding As Decimal = 15D
Private _strSeasonBoxSeats As String = "Box Seats $2500"
Private _strSeasonLowerDeck As String = "Lower Deck Seats $1500"
Private _strSingleBoxSeats As String = "Box Seats $55"
Private _strSingleLowerDeck As String = "Lower Deck Seats $35"
Private _strUpperDeck As String = "Upper Deck Seats $25"
Private _strSRO As String = "Standing Room Only $15"Private Sub cboTicketType_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboTicketType.SelectedIndexChanged
'This event handler allows the user to enter choices on form.
'Then it calls subprocesures to place seats in list box.
Dim intTicketChoice As Integer
intTicketChoice = Me.cboTicketType.SelectedIndex
Me.lstSeats.Items.Clear()
Select Case intTicketChoice
Case 0
SeasonTickets()
Case 1
SingleGameTickets()
End Select
'Make items visible in window.
Me.lblNumberOfTickets.Visible = True
Me.txtNumberOfTickets.Visible = True
Me.lblSeatType.Visible = True
Me.lstSeats.Visible = True
Me.btnTicketCost.Visible = True
Me.btnClear.Visible = True
Me.lblCost.Visible = True
'clear labels
Me.txtNumberOfTickets.Text = ""
Me.lblSeatType.Text = ""
Me.lblCost.Text = ""
'set focus
Me.txtNumberOfTickets.Focus()
End Sub
Private Sub SeasonTickets()
'This procedure fills in the possible seat types for season tickets.
Me.lstSeats.Items.Add(_strSeasonBoxSeats)
Me.lstSeats.Items.Add(_strSeasonLowerDeck)
End Sub
Private Sub SingleGameTickets()
'This procedure fills in seat types for single game tickets
Me.lstSeats.Items.Add(_strSingleBoxSeats)
Me.lstSeats.Items.Add(_strSingleLowerDeck)
Me.lstSeats.Items.Add(_strUpperDeck)
Me.lstSeats.Items.Add(_strSRO)
End Sub
Private Sub btnTicketCost_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTicketCost.Click
'This event handler determines the cost of the tickets chosen.
'Then it displays the total cost.
Dim intNumberTix As Integer
Dim blnNumberTixIsValid As Boolean = False
Dim blnSeatTypeIsSelected As Boolean = False
Dim intSeatType As Integer
Dim strSelectedSeat As String = ""
Dim decTotalCost As Decimal
'Call a function to ensure number of tickets is valid.
blnNumberTixIsValid = ValidateNumberTix()
'Call a function to make sure ticket type selected.
intSeatType = ValidateSeatSelection(blnSeatTypeIsSelected, strSelectedSeat)
'If the number of tickets ordered is valid, calculate the cost.
If (blnNumberTixIsValid And blnSeatTypeIsSelected) Then
intSeatType = Me.cboTicketType.SelectedIndex
Select Case intSeatType
Case 0
decTotalCost = SeasonTicketsFindCost(intSeatType, _
intNumberTix)
Case 1
decTotalCost = SingleTicketsFindCost(intSeatType, _
intNumberTix)
End Select
'Display Cost.
lblCost.Text = & decTotalCost.ToString("C")
End If
End Sub
Private Function ValidateNumberTix() As Boolean
'This function validates value entered for number of tickets.
Dim intNumberOfTix As Integer
Dim blnValidityCheck As Boolean = False
Dim strTicketNumberErrorMessage As String = _
"Please enter the number of tickets you would like to buy (1-20)"
Dim strMessageBoxTitle As String = "Error"
Try
intNumberOfTix = Convert.ToInt32(Me.txtNumberOfTickets.Text)
If intNumberOfTix > 0 And intNumberOfTix < 21 Then
blnValidityCheck = True
Else
MessageBox.Show(strTicketNumberErrorMessage, _
strMessageBoxTitle)
Me.txtNumberOfTickets.Focus()
Me.txtNumberOfTickets.Clear()
End If
Catch Exception As FormatException
MessageBox.Show(strTicketNumberErrorMessage, _
strMessageBoxTitle)
Me.txtNumberOfTickets.Focus()
Me.txtNumberOfTickets.Clear()
Catch Exception As OverflowException
MessageBox.Show(strTicketNumberErrorMessage, _
strMessageBoxTitle)
Catch Exception As SystemException
MessageBox.Show(strTicketNumberErrorMessage, _
strMessageBoxTitle)
Me.txtNumberOfTickets.Focus()
Me.txtNumberOfTickets.Clear()
End Try
Return blnValidityCheck
End Function
Private Function ValidateSeatSelection(ByRef blnType As Boolean, _
ByRef strType As String) As Integer
'This function makes sure user sleects a seat type.
Dim intSeatType As Integer
Try
intSeatType = Convert.ToInt32(Me.lstSeats.SelectedIndex)
strType = Me.lstSeats.SelectedItem.ToString()
blnType = True
Catch Exception As SystemException
'Detects if seat type not selected.
MessageBox.Show("Select a seat type", "Error")
blnType = False
End Try
Return intSeatType
End Function
Private Function SeasonTicketsFindCost(ByVal intSeatType As Integer, _
ByVal intNumberTix As Integer) As Decimal
'This function will calculate cost of season tickets.
Dim decTotalCost As Decimal
Dim decSeatCost As Decimal
Dim decNumberTix As Decimal
Select Case intSeatType
Case 0
decSeatCost = _decSeasonBoxSeat
decNumberTix = intNumberTix
Case 1
decSeatCost = _decSeasonLowerSeat
decNumberTix = intNumberTix
End Select
decTotalCost = decSeatCost * decNumberTix
Return decTotalCost
End Function
Private Function SingleTicketsFindCost(ByVal intseattype As Integer, _
ByVal intNumberTix As Integer) As Decimal
'This function will calvulate the cost of single tickets.
Dim decTotalCost As Decimal
Dim DecSeatCost As Decimal
Dim decNumberTix As Decimal
Select Case intseattype
Case 0
DecSeatCost = _decSingleBoxSeat
decNumberTix = intNumberTix
Case 1
DecSeatCost = _decSingleLowerSeat
decNumberTix = intNumberTix
Case 2
DecSeatCost = _decStanding
decNumberTix = intNumberTix
Case 3
DecSeatCost = _decUpperSeat
decNumberTix = intNumberTix
End Select
decTotalCost = DecSeatCost * intNumberTix
Return decTotalCost
End Function
Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
'This event handler clears the form and resets the form for reuse,
'when user clicks the clear button.
Me.cboTicketType.Text = "Select Ticket Type"
Me.txtNumberOfTickets.Clear()
Me.lstSeats.Items.Clear()
Me.lblCost.Visible = False
Me.lblTotalCost.Visible = False
End Sub
Private Sub frmBaseBallTicketSales_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'This handler creates 5 seconds for the splash screen
Threading.Thread.Sleep(5000)
End Sub
End Class
Hope I did this right.
modified on Monday, May 10, 2010 3:27 PM
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It would be nice if you would put your code in some <pre></pre> tags so it easy to read.
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I have no idea how to use those tags. When I said newbie I meant very new. Like a baby just born.
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Do this when you edit your message:
<pre>
**Your code here**
</pre>
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Edit your post. Select the code segments then click on the "code block" link on the line above
Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Individuality is fine, as long as we do it together - F. Burns
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Thank you very much!! I got it, I think.
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You're welcome. Looks much more gooder
Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Individuality is fine, as long as we do it together - F. Burns
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I second that; it is unreadable right now. You could still edit the existing message though.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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When I pasted the code it was indented. I do not know how to indent other than using the tab key... I'm sorry.
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outside of PRE tags, tabs are just spaces, and multiple spaces get ignored. Inside PRE tags, it all works pretty much like in a code editor.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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dorkpixie wrote: appears to do nothing at all
What does that mean? You click the button and no code runs? You click the button and the code runs but gives no output?
Have you stepped through the code using the debugger?
Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Individuality is fine, as long as we do it together - F. Burns
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Click the button and get no output at all. No errors either. Weirdest non running code I have ever written.
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Okay if you click the button and no code runs at all, check that the button is actually hooked up to the function through the Events property sheet.
If the button is hooked to the event handler then set a breakpoint in the event handler and step through the code until you narrow down where the problem is.
Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Individuality is fine, as long as we do it together - F. Burns
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1) in your btnTicketCost, and an else clause to the If block, and display a validation error message, your Validate Ticket might never be returning True, hence never resulting in any output.
2) If #1 above never returns True, start putting debug statements in the function to try and establish which part(s) is/are causing the validation to fail.
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First, they told you about the pre tag, but what they didn't tell you was that you can specify which language you're using which helps with the coloring. In your case, you're pre tags should look like:
<pre lang="vbnet">
Beyond that, I'll just comment on what I see...
I don't know if your assignment was to use decimal types or not, but it doesn't look like it's necessary since you're dealing wholly with integer values and should never get any decimal values.
I also don't know if you were told to use Select Case statements, but you can use If/Else if they're small statments...for instance you wrote:
Select Case intTicketChoice
Case 0
SeasonTickets()
Case 1
SingleGameTickets()
End Select
which is a total of 11 words and 78 characters.
If intTicketChoice = 0 Then
SeasonTickets()
Else
SingleGameTickets()
End If
is 10 words and 66 characters. Also, the If/Else should be streamlined as far as the number of cycles it takes to evaluate since I assume the Select Case just builds a series of If/ElseIf statements.
Let's start with btnTicketCost_Click. You have some strange code here. First, what is it that it needs to do? Well, it looks like it needs to check to make sure that a ticket type was selected and that an appropriate number of tickets were selected for purchase and then adds up the total. So what is it that you actually do? You create intNumberTix, but then you never set it to anything. You then run a function to validate the number of tickets. That checks to see if the number in the TextBox was between 1 and 20. If it isn't, you show a MessageBox asking them to re-enter the number of tickets, I guess.
First, that ValidateNumberTix is way too long. It could just be:
Private Function ValidateNumberTix() as Boolean
If Not IsNumeric(Me.txtNumberOfTickets.Text) Then
ResetNumberTix()
Return False
Else
Dim intNumberTix As Long = CLng(Me.txtNumberOfTickets.Text)
If intNumberTix < 1 Or intNumberTix > 20 Then
ResetNumberTix()
Return False
End If
End If
Return True
End Function
Private Sub ResetNumberTix()
MessageBox.Show("Please enter the number of tickets you would like to buy (1-20)", "Error")
Me.txtNumberOfTickets.Focus()
Me.txtNumberOfTickets.Clear()
End Sub
You create extra variables in memory that you don't need which take extra cycles.
Back to btnTicketCost_Click. You can first just check if the number of tickets is valid and if it isn't, exit the sub. Then, you can check if the user made a ticket type selection. You can do this a lot simpler than you did. First, just check if there were any selected items using
If lstSeats.SelectedItems.Count = 0 Then
MessageBox.Show("Select a seat type", "Error")
Return
End If
Then, just make a function to return the seat type. (As an FYI, naming a method using the phrase "Validate" implies it will return a boolean. Using proper naming conventions can really help when trying to figure out what you did later). You passed into ValidateSeatSelection a variable name strSelectedSeat, which you then never used again. Once again, another unnecessary variable. You also set intSeatType twice.
I'm also quite confused about what values can be in intSeatType. Initially, you just check for 0 and 1. If it's 0, you go to SeasonTickets, if it's 1, SingleTickets. But, then within each of those function, you re-evaluate intSeatType and it apparently has a different meaning. I think you used the same variable name to check if it's supposed to be season tickets or single tickets, and for what type of seat it is.
I would rewrite it to something more like:
If Not ValidateNumberTix() Then Return
If lstSeats.SelectedItems.Count = 0 Then
MessageBox.Show("Select a seat type", "Error")
Return
End If
Dim intSeatType As Integer = Me.cboTicketType.SelectedIndex
Dim lngTotalCost as Long
If intSeatType = 0 Then
lngTotalCost = SeasonTicketsFindCost(lstSeats.SelectedIndex, _
CInt(Me.txtNumberOfTickets.Text))
Else
lngTotalCost = SingleTicketsFindCost(lstSeats.SelectedIndex, _
CInt(Me.txtNumberOfTickets.Text))
End If
lblCost.Text = String.Format("{0:C}",lngTotalCost)
Again, Decimal is really only needed when dealing with cents. When dealing with whole numbers, you shouldn't see any problems with multiplication. Decimal takes a lot more overhead and is a lot slower than just using a long or integer.
And, instead of sleeping the thread for the splash screen, you would be better off using a Timer. If the user clicks on the splash screen during that 5 seconds, it could end up looking funny. Just use a timer, set it to tick every 5000 milliseconds and when the timer ticks, just close the form.
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There's a couple of things... You're help is awesome and easy to understand.
However, since this is still a beginner VB class there are some things we have not been taught to use yet such as: Dim intNumberTix As Long = CLng(Me.txtNumberOfTickets.Text)
have no idea what Long and CLng is.. and If lstSeats.SelectedItems.Count = 0 Then, we have not done counts yet. So while I generally understand what this means:
If intSeatType = 0 Then
lngTotalCost = SeasonTicketsFindCost(lstSeats.SelectedIndex, _
CInt(Me.txtNumberOfTickets.Text))
Else
lngTotalCost = SingleTicketsFindCost(lstSeats.SelectedIndex, _
CInt(Me.txtNumberOfTickets.Text))
End If
lblCost.Text = String.Format("{0:C}",lngTotalCost)
I have never seen lng or Long as a variable type. I can however take what you have given me and put it into what we have learned.
Sometimes in the introductory courses they kind of force you to use certain things. Such as the way the splash screen is timed. I am glad though that I have gotten feedback from others who have more experience so that I do not miss these lessons. Hopefully classes will get to them so I don't graduate with completely wrong information. Thank you again for your help. Do you want me to post working code when I finish it?
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Hmm...that's curious...you were taught about Decimals before Longs? A Long is just a larger Integer. Decimal is definitely not a standard type. The 4 standard VB numeric types are Integer, Long, Float, and Double. An Int is only good up to 32,767. A Long goes beyond that. CLng is just a conversion method. There are many of these...CInt, CDec, CLng, CDbl...So, if you pass in a string value to any of them, it will try to return whatever number is in that string in the selected type. Or it you pass an Integer into CDbl, it will return that Integer as a Double.
As far as the SelectedItems.Count, that is just a property within the ListBox. I assume that since you are allowed to use a ListBox, you should be allowed to use any of its methods. That is just one of them.
But, I know about profs not wanting you to skip ahead. In one of my classes, I read ahead and found the switch in C++ (the same as VB's Select) and used it instead of a series of for loops and was told that I wasn't to use something we hadn't been taught yet.
And you may not feel like you need one, but when I was in college, I was a tutor and I hope that it helped the people that I tutored. Normally, schools provide the service free of charge and it can be really helpful to have someone who's gotten further helping you understand how to structure a program and even giving hints on what has worked for them and what hasn't.
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William,
Thank you very much for your insights and help. i do not think this particular professor would knock me for going ahead but I didn't want to try him. When I got his reveiw of my homework he said, "There were only two problems with {my} code which were giving {me} problems. The first problem is {I} forgot to set the number of tickets based on the entered value for the number of tickets. The other problem is {my} line for converting the value to string {....} Should be:
'display cost.
lblCost.txt = decTotalCost.ToString
"Once {he} fixed those things the program worked great."
Now, I agree with you that there was just too much code. But in an introductory class they are looking that mainly the program works and that the UI does what it is supposed to do. I was surprised that I got an A but pretty happy.
The Decimal thing; as you can see my prof also used decimal, the program assignment as written in the book, wants the total cost to be in the format of $8888.00. So we were kind of forced into the dec format; I found it annoying as well since it added to the code and also made it confusing when working with both integers and decimals.
Anyway, I found all of you expertise helpful and if I could afford to pay you to tutor; I would see if you were up for the challenge; however like most students I am poooooor. The university at this time does not have VB tutors, but as soon as they do, they will let me know. 
Thank you again. I will definitely be back!! This site is awesome as a resource and for help. Oh, and we're learning arrays this unit so I may need the help ;0
Thanks again, looking forward to talking with you again.
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BTW...the simple answer is
#1) You never set intNumberTix
#2) You use intSeatType twice meaning two different things...first the seat type (lower, box, etc...), then the ticket type (season vs. single)
intSeatType = ValidateSeatSelection(blnSeatTypeIsSelected, strSelectedSeat)
If (blnNumberTixIsValid And blnSeatTypeIsSelected) Then
intSeatType = Me.cboTicketType.SelectedIndex
Select Case intSeatType
Case 0
decTotalCost = SeasonTicketsFindCost(intSeatType, _
intNumberTix)
Case 1
decTotalCost = SingleTicketsFindCost(intSeatType, _
intNumberTix)
End Select
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Hi, i'm having a problem on put a menustrip on a mdi children, when i load my project, the "bar" appears, but the options(itens) doesn't, does anyone knows what is the problem? thank you
Marcus Abrahão
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do you have an options menu on the parent form? if so they more than likely have merged
Marc Clifton wrote: That has nothing to do with VB. - Oh crap. I just defended VB!
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