Visual Basic

Re: VB6 code works like a treat but need it in vb.net grrr

8-Mar-10 0:45

Just an update here is what i have done in vb.net

dim objReader as new system.IO.StreamReader(FILE_NAME)

Do while not EOF(1)

list1.text = names(a) & objReader.readline()
a=a+1
loop

objReader.close
call highscores

For some reason when i try to run the code it doesn't like the dow while loop and says bad file name or number?

If anybody can help me that would be really cool

Dan

David Skelly8-Mar-10 2:13

David Skelly

8-Mar-10 2:13

If you are using StreamReader then you can do this (taken straight from the documentation for StreamReader):

' Create an instance of StreamReader to read from a file.
Dim sr As StreamReader = New StreamReader("TestFile.txt")
Dim line As String
' Read and display the lines from the file until the end
' of the file is reached.
Do
    line = sr.ReadLine()
    Console.WriteLine(Line)
Loop Until line Is Nothing
sr.Close()

You don't need to worry about file numbers in VB.NET.

Re: VB6 code works like a treat but need it in vb.net grrr

Wayne Gaylard8-Mar-10 1:03

Wayne Gaylard

8-Mar-10 1:03

From what I can gather, basically what you are trying to do is to read a list of players and their high scores from a text file, and populate arrays named names and scores. In .Net you need to import System.IO and use a StreamReader to read from the file. An important consideration obviously, is the set up of the original text file. i.e - is it a comma delimted file ?, is each record on a new line ? etc. I threw this together, working on a few assumptions. 1. The text file is stored in the same folder as the application executable. 2. The text file consists of a new line for each player, and each player property is separated by a comma.

names = New List(Of String)
scores = New List(Of Integer)
Dim strFilename As String = Application.StartupPath & "\highscores.txt"
Dim srScores As New StreamReader(strFilename)
While Not srScores.EndOfStream
    Dim strRead As String = srSave.ReadLine
    ListBox1.Items.Add(strRead)
    Dim strSplit() As String = Split(strRead, ",")
    names.Add(strSplit(0))
    scores.Add(strSplit(1))
End While
srScores.Close()

I also assumed names and scores were lists rather than arrays. You would obviously need to consider error handling as a major issue which I have completely ignored.
Hope this helps.

Re: VB6 code works like a treat but need it in vb.net grrr

offroaderdan8-Mar-10 2:19

Re: VB6 code works like a treat but need it in vb.net grrr

8-Mar-10 2:19

Cheers Zimvbcoder.

This is indeed very helpful Big Grin | :-D

However i have a few questions

names = New List(Of String)   ' vb doesn't like the new list of string? 
        scores = New List(Of Integer)
        Dim strFilename As String = Application.StartupPath & "\highscores.txt"
        Dim srScores As New StreamReader(strFilename)
        While Not srScores.EndOfStream
            Dim strRead As String = srSave.ReadLine
            ListBox1.Items.Add(strRead)
            Dim strSplit() As String = Split(strRead, ",")
            names.Add(strSplit(0))   ' doesnt like names.add?
            scores.Add(strSplit(1))
        End While
        srScores.Close()

Also srSave isn't doing anything?

I am very grateful for you replying to my post.

Many thanks

Dan

The Man from U.N.C.L.E.8-Mar-10 2:54

The Man from U.N.C.L.E.

8-Mar-10 2:54

For List(Of ) you need to import System.Collections.Generic.
As for srSave, I think you made a typo. It should be. Dim strRead As String = srScores.ReadLine()

If you have knowledge, let others light their candles at it.
Margaret Fuller (1810 - 1850)
[My Articles] [My Website]

Re: VB6 code works like a treat but need it in vb.net grrr

offroaderdan8-Mar-10 3:25

Re: VB6 code works like a treat but need it in vb.net grrr

8-Mar-10 3:25

Thanks the man from U.N.C.L.E

so are you saying that the following code would become

name = New list(of system.collection.generic) ?

This comes up saying do i want to change what i have written to
system.collection.IEnumerable
system.collection.IEnumerator
system.collection.Generic.list(ofT)
system.collection.queue
system.collection.generic.IList(ofT)

Many thanks

Dan

The Man from U.N.C.L.E.8-Mar-10 3:52

The Man from U.N.C.L.E.

8-Mar-10 3:52

Other way round:

New System.Collections.Generic.List(Of String)

If you have knowledge, let others light their candles at it.
Margaret Fuller (1810 - 1850)
[My Articles] [My Website]

Re: VB6 code works like a treat but need it in vb.net grrr

offroaderdan8-Mar-10 4:10

Re: VB6 code works like a treat but need it in vb.net grrr

8-Mar-10 4:10

Sorry,

I just tried that, so the code is

names = New System.Collections.Generic.List(Of String)

but it comes up with an error as well as a blue squigly underneath saying it cannot be converted to '1 dimensional array of string??

I thank you for your patience

Dan

The Man from U.N.C.L.E.8-Mar-10 4:22

The Man from U.N.C.L.E.

8-Mar-10 4:22

No worries.

Sounds like you have left the declaration of your variable as Dim names as string(). You need to change that to a List(Of as well. E.g.

Dim names = System.Collections.Generic.List(Of String)
names = New System.Collections.Generic.List(Of String)()

vb>Dim

If you have knowledge, let others light their candles at it. 
Margaret Fuller (1810 - 1850)
<a href="http://www.codeproject.com/script/Articles/MemberArticles.aspx?amid=926797" target="_Blank">[My Articles]</a>  <a href="http://JacksonSoft.co.uk" target="_Blank">[My Website]</a>

Re: VB6 code works like a treat but need it in vb.net grrr

offroaderdan8-Mar-10 5:07

Re: VB6 code works like a treat but need it in vb.net grrr

8-Mar-10 5:07

Thanks a lot

I have decided to show the code that i am using from start to fininsh.
I am using 1 button called comtest
2 list boxes called listBox1 and ListBox2
2 textboxes called text1 and text2

Imports System.IO

Public Class Form1
    Dim scores = New System.Collections.Generic.List(Of String)
    Dim names = New System.Collections.Generic.List(Of String)
    Dim test1(0 To 10) As String
    Dim test2(0 To 10) As Integer
    Dim userscore As Integer
    Dim username As String
    Dim a As Integer
    Dim b As Integer
    Dim i As Integer
    Dim strFilename As String = ("High Scores.txt")



Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
        Call highscore()
        names = New System.Collections.Generic.List(Of String)
        scores = New System.Collections.Generic.List(Of Integer)
        Dim srScores As New IO.StreamReader(strFilename)
        While Not srScores.EndOfStream
            Dim strRead As String = srScores.ReadLine
            ListBox1.Items.Add(strRead)
            Dim strSplit() As String = Split(strRead, ",")
            names.Add(strSplit(0))
            scores.Add(strSplit(1))
        End While
        srScores.Close()


    End Sub

Private Sub comtest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles comtest.Click
    username = Text1.Text
    userscore = Val(Text2.Text)
    For i = 1 To 10
        a = scores(i)
        If userscore >= a Then
            test1(i) = username
            test2(i) = userscore
            For b = i + 1 To 10
                test1(b) = names(b - 1)
                test2(b) = scores(b - 1)
            Next
            Call newscore()
            Exit Sub
        End If
        test1(i) = names(i)
        test2(i) = scores(i)
    Next
End Sub
Private Sub highscore()
    For i = 1 To 10
        ListBox1.Items.Add(names(i))
            List2.Items.Add(scores(i))
    Next
End Sub
Private Sub newscore()  ' write
    ListBox1.ClearSelected()
    List2.ClearSelected()
    For i = 1 To 10
        ListBox1.Items.Add(test1(i))
        List2.Items.Add(test2(i))
        names(i) = test1(i)
        scores(i) = test2(i)
    Next
    Dim objWriter As New System.IO.StreamWriter(highScoresFile)

    For i = 1 To 10
        objWriter.Write(names(i) & "," & scores(i))

    Next
    objWriter.Close()
End Sub

This is the VB6 version with the same properties

Dim scores(1 To 10) As Integer
Dim names(1 To 10) As String
Dim test1(1 To 10) As String
Dim test2(1 To 10) As Integer
Dim userscore As Integer
Dim username As String
Dim a As Integer
Dim b As Integer

Private Sub comtest_Click()
username = Text1.Text
userscore = Val(Text2.Text)
For i = 1 To 10
    a = scores(i)
    If userscore >= a Then
        test1(i) = username
        test2(i) = userscore
            For b = i + 1 To 10
                test1(b) = names(b - 1)
                test2(b) = scores(b - 1)
            Next
            Call newscore
            Exit Sub
    End If
    test1(i) = names(i)
    test2(i) = scores(i)
Next
End Sub

Private Sub Form_Load()
Open App.Path & "\files\high scores.txt" For Input As #1
a = 1
While Not EOF(1)
Input #1, names(a), scores(a)
a = a + 1
Wend
Close #1
Call highscore
End Sub
Private Sub highscore()
For i = 1 To 10
    List1.AddItem names(i)
    List2.AddItem scores(i)
Next
End Sub
Private Sub newscore()
List1.Clear
List2.Clear
For i = 1 To 10
    List1.AddItem test1(i)
    List2.AddItem test2(i)
    names(i) = test1(i)
    scores(i) = test2(i)
Next
Open App.Path & "\files\high scores.txt" For Output As #1
For i = 1 To 10
Print #1, names(i) & "," & scores(i)
Next
Close #1
End Sub

I thought i had done coded the vb correctly with the help of zimvbcoder and the man from U.N.C.L.E howver have made a mistake somewhere. If someone can help me that would be very very very very helpful

Again thanks a million

Dan

Wayne Gaylard8-Mar-10 3:13

Wayne Gaylard

8-Mar-10 3:13

I assumed that the list of names and the list of scores would be previously declared. To be honest with you I would create a class Player in my app, and in that class you could have a function GetAllPlayers which would look like this :

Imports System.IO

    Public Class Player
    Implements IComparable

    Private strName As String
    Private intHighScore As Integer

    Public Property Name() As String
        Get
            Return strName
        End Get
        Set(ByVal value As String)
            strName = value
        End Set
    End Property

    Public Property HighScore() As Integer
        Get
            Return intHighScore
        End Get
        Set(ByVal value As Integer)
            intHighScore = value
        End Set
    End Property

    Public Function CompareTo(ByVal obj As Object) As Integer Implements System.IComparable.CompareTo

        Dim OtherPlayer As Player = CType(obj, Player)
        Return Me.HighScore - OtherPlayer.HighScore

    End Function

    Shared Function GetAllPlayers(ByVal FileName As String) As List(Of Player)

        Dim lstPlayers As New List(Of Player)
        Dim strFilename As String = FileName
        Using srScores As New StreamReader(strFilename)
            While Not srScores.EndOfStream
                Dim newPlayer As New Player
                Dim strRead As String = srScores.ReadLine
                Dim strPlayerProperties() As String = Split(strRead, ",")
                newPlayer.Name = strPlayerProperties(0)
                newPlayer.HighScore = strPlayerProperties(1)
                lstPlayers.Add(newPlayer)
            End While
        End Using
        Return lstPlayers

    End Function

End Class

Then you can declare a list(Of Player) in your main form and populate it like this :

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

   Try
        lstPlayers = Player.GetAllPlayers(My.Settings.HighScoresFile)
        lstPlayers.Sort()
        For i As Integer = 0 To lstPlayers.Count - 1
            ListBox1.Items.Add(lstPlayers(i).Name & ", " & lstPlayers(i).HighScore)
        Next
    Catch ex As System.IO.IOException
        MsgBox("There was an error retrieving High Scores.")
    End Try

End Sub

This is very simple but a good way to start thinking in a more structured way.

Re: VB6 code works like a treat but need it in vb.net grrr

offroaderdan8-Mar-10 3:46

Re: VB6 code works like a treat but need it in vb.net grrr

8-Mar-10 3:46

This LOOKS pretty awsome Big Grin | :-D

I have one error and i don't actually know why.

lstPlayers = Player.GetAllPlayers(My.Settings.HighScoresFile)

VB doesn't like .High Scores File.

This is probably something stupid whch i've done but i can't work out why that doesn't like it?

Thanks again

Dan

Wayne Gaylard8-Mar-10 19:23

Wayne Gaylard

8-Mar-10 19:23

Hi there. Sorry it is my fault, I forgot to mention that where ever possible it is not a good idea to hardcode things like Filenames, Connectionstrings, etc into your app. The best way to do this is to use your Application.Settings file which is automatically generated for you by VS. To access the settings file, right click on your project in Solution Explorer, select properties and a form should open up with various tabs to set up options for your app. Select Settings tab and there you can store application specific settings such as file names and connection strings. To set up HighScoresFile, type the name HighScoresFile under name, under type select string, under scope select application, and under value put the full address of the file. To access any of your settings then from your app you call My.Settings.'insert setting name here'. When considering where to put the file, you need to take into account where you will deploy the application and where the High Scores file will actually be kept when the app has been deployed on other machines. Hope this helps.

error message at runtime [modified] .... resolved

Daniel Engelkes7-Mar-10 12:50

7-Mar-10 12:50

when running application when program hits this code I get this error.

<code>     For y As Integer = 0 To frmtodayscafe.count
          For x As Integer = 2 To 12

          writeline1(x) = filename(y) + vbTab + frmtodayscafe.totalitemquantity(y) + vbTab + FormatCurrency(filename1(y)) + vbTab + vbTab + FormatCurrency(frmtodayscafe.cost(y))
                       
          Next
      Next</code>

cheeseburger is assign to filename(y) which is declared as a string array
filename1(y) is a numeric value cost of the cheeseburger. writeline1(x) is also a string array.

by changing the code to the following:

writeline(x) = filename(y) + vbTab + format(frmtodayscafe.totalitemquantity(y)) + vbTab + FormatCurrency(filename1(y)) + vbTab + vbTab + FormatCurrency(frmtodayscafe.cost(y))

modified on Monday, March 8, 2010 12:30 PM

TremaHD7-Mar-10 13:20

TremaHD

7-Mar-10 13:20

Where come from the value "cheeseburger"? Which variable hold that value? Are you trying to do a "FormatCurrency" on that value?

Daniel Engelkes7-Mar-10 13:35

7-Mar-10 13:35

cheeseburger is a string loaded from a file .... I am trying to write the string to a concatenated string to include qty, pricing, and total pricing.

it should say on the string

cheeseburger 1 $3.00 $3.00

TremaHD7-Mar-10 13:45

TremaHD

7-Mar-10 13:45

What is the type of writeline1(x)? Is it a string or double?

Daniel Engelkes7-Mar-10 15:05

7-Mar-10 15:05

wireline1 is a string array

RCoate7-Mar-10 18:28

RCoate

7-Mar-10 18:28

You are doing a FormatCurrency on a string value of "Cheeseburger".
I know of few countries where cheeseburgers are legal tender.

You may want to try the amount (double) rather than the file name (string).

Daniel Engelkes8-Mar-10 5:37

Re: error message at runtime .... issuse resolved

8-Mar-10 5:37

filename(0) = cheeseburger

filename1(0) = 5.00

filename1(0) is being formatted to currency by not filename(0)

cheeseburger is not being formatted as double.

Daniel Engelkes8-Mar-10 6:28

8-Mar-10 6:28

by changing the code to the following has resolved issues. there are no more errors at runtime.

writeline(x) = filename(y) + vbTab + format(frmtodayscafe.totalitemquantity(y)) + vbTab + FormatCurrency(filename1(y)) + vbTab + vbTab + FormatCurrency(frmtodayscafe.cost(y))

Message Removed

7-Mar-10 9:21