Add Item To ArrayList

Hi, I Have some problem to add ListBox Item to ArrayList.
can anyone help me what I do wrong?

Code:

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Dim myStreamReader As StreamReader = File.OpenText(LastFile) 'Last Opened File

        Dim intListBoxTabs() As Integer = {80, 180}
        Dim intRes As Integer
        Dim myInputString As String
        Dim t As Task
        Dim Prio As Integer
        Dim Due As Date
        Dim ToDo As String

        List.Items.Clear()
        intRes = SendMessage(List.Handle, _
                              LB_SETTABSTOPS, _
                              intListBoxTabs.Length, _
                              intListBoxTabs(0))

        While myStreamReader.Peek() > -1
            myInputString = myStreamReader.ReadLine()


            If Not myInputString Is Nothing Then

                  t = New Task(Prio, Due, ToDo)
                tasks.Add(t)

            End If
        End While

        Dim i As Integer
        Dim s As String = ""

        If tasks.Count > 0 Then
            For i = 0 To tasks.Count - 1
                't = Split(myInputString, ",")
                List.Items.Add(Prio & vbTab & Due & vbTab & ToDo)
            Next
        End If
        tasks.Sort()


        myStreamReader.Close()
    End Sub

End Class

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Thanks

I'm guessing that tasks is your ArrayList and that the red line is where you're having trouble?

Are you getting an error message? If so, what is it?

Can you let us see the definition of your Task class?

Hi trisuglow, you're right. ;)

I'm having trouble there ( or somewhere else)

Here is the class...

Code:

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Public Class Task
    Implements IComparable
    Private mPrio As Integer
    Private mDue As DateTime
    Private mToDo As String

    Public Sub New(ByVal Prio As Integer, _
                    ByVal Due As DateTime, _
                    ByVal ToDo As String)
        mPrio = Prio
        mDue = Due
        mToDo = ToDo
    End Sub

    Public Function Prio() As Integer
        Return mPrio
    End Function

    Public Function Due() As DateTime
        Return mDue
    End Function

    Public Overloads Function CompareTo(ByVal t1 As Object) As Integer Implements IComparable.CompareTo
        If t1.Prio() > mPrio Then
            Return 1
        ElseIf t1.Prio < mPrio Then
            Return -1
        Else
            'the two tasks have equal priority
            Return DateTime.Compare(mDue, t1.due())
        End If
    End Function

    Public Overrides Function ToString() As String
        Return mPrio.ToString & "_" & mDue.ToShortDateString() & "_" & mToDo
    End Function
End Class

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Thanks :)

Just a thought...

You are declaring t as a New ArrayList aren't you?


Tris.

Yes, you're right

Quote:

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Originally posted by trisuglow


You are declaring t as a New ArrayList aren't you?

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And that's the problem Marcels... you are making a new Arraylist everytime you want to add something instead of adding it to the same one.

Do you have another idea, if I want to add everything into the same one?

Remove t = New Task(Prio, Due, ToDo) from the if block.

Quote:

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Originally posted by marcels
Do you have another idea, if I want to add everything into the same one?

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1) You haven't included the code where you declare tasks. I see a line tasks.add(t), but I don't see the decleration. Where is it?

2) Also, you haven't said what the error is, or what you are trying to do... you should give more information, otherwise this will turn into a 20 post thread and people will view it and think ***.

3) You only need to declare one instance of your Task class. But you do need a method to ADD things. I don't see one in your class. All I see is a NEW function, which does little to help you list tasks all in one place, much less compare them.