集合和变量

Question

我在 Visual Basic.net 中有一个集合（很抱歉，如果人们第十亿次看到此代码...）

这是到目前为止的代码：

Public Class MainFrm

Private _storage As New List(Of StopwatchStorage)

Public TotalParticipants As Integer ' The total number of participants, will be set via an options form.
Private participantLbl As Label ' A label which will hold the ordered number.
Public participantName As TextBox ' A blank textbox to allow the user to name the participant
Private participantClock As Label ' This is a label which will display the stopwatch
Public ParticipantStop As Button ' A button used to the stop the timer on the participant.
Private participantContinue As Button ' A button used to continue the timer when accidentally stopped.
Private participantTimer As Timer ' A timer to continuously update the labels on pulses.
Public eventName As String = "" ' The Event name itself

' The options
Public numEntrants As Integer = 30 ' The maximum number of participants, set at 30 by default.
Public startingEntrants As Integer = 2 ' The number of timers to start simultaneously., set a 2 by default
Public entryTimer As Integer = 90 ' The timer to seperate and space the entries. Set to 90 by default
Public addAuto As Boolean = False ' A checkbox to determine whether or not to automatically add a participant.

Dim counterTimer As Integer ' A simple holder to count down the entryTimer.

Private participantContinueTimers As TimeSpan
Private participantContinuation As New Stopwatch ' A Stopwatch to hold the continuation timer in the event of an error
Private participantStopwatch As New Stopwatch
Private matchStopwatch As New Stopwatch

Private Sub Participant_Stop(sender As Object, args As EventArgs)
    For Each storage As StopwatchStorage In _storage
        If storage.Button Is sender Then
            storage.Stopwatch.Stop()
            storage.Button.Visible = False
            storage.ContinueBtn.Visible = True

            ' Reset the Continuation timer
            storage.Continuation.Start()
        End If
    Next
End Sub


Private Sub StartButton_Click(sender As System.Object, e As System.EventArgs) Handles StartButton.Click
    For indexCounter As Integer = 1 To startingEntrants Step 1
        DrawControls(indexCounter)
    Next
End Sub


Private Sub Participant_Resume(sender As Object, args As EventArgs)
    For Each storage As StopwatchStorage In _storage
        If storage.ContinueBtn Is sender Then
            storage.ContinueBtn.Visible = False
            storage.Button.Visible = True
            storage.Stopwatch.Start()
            storage.Continuation.Stop()

            ' Add the value from storage.Continuation.Elapsed to a continuing tally
            storage.ParticipantContinueTimers += storage.Continuation.Elapsed
            storage.Continuation.Reset()
        End If
    Next
End Sub

Private Sub DrawControls(records As Integer)
    participantLbl = New Label
    participantLbl.Location = New Point(5 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantLbl.Size = New Size(22, 20)
    participantLbl.TextAlign = ContentAlignment.MiddleCenter
    participantLbl.Text = records
    CenterPanel.Controls.Add(participantLbl)

    participantName = New TextBox
    participantName.Location = New Point(31 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantName.Size = New Size(105, 20)
    CenterPanel.Controls.Add(participantName)

    participantClock = New Label
    participantClock.Size = New Size(100, 20)
    participantClock.Name = "participantClock" & TotalParticipants
    participantClock.Location = New Point(139 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantClock.BorderStyle = BorderStyle.Fixed3D
    participantClock.TextAlign = ContentAlignment.MiddleRight
    CenterPanel.Controls.Add(participantClock)

    ParticipantStop = New Button
    ParticipantStop.Size = New Size(63, 20)
    ParticipantStop.Location = New Point(245 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    ParticipantStop.BackColor = Color.Red
    ParticipantStop.ForeColor = Color.White
    ParticipantStop.Font = New Font(ParticipantStop.Font, FontStyle.Bold)
    ParticipantStop.Text = "Stop"
    CenterPanel.Controls.Add(ParticipantStop)
    AddHandler ParticipantStop.Click, AddressOf Participant_Stop


    participantContinue = New Button
    participantContinue.Size = New Size(63, 20)
    participantContinue.Location = New Point(245 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantContinue.BackColor = Color.Green
    participantContinue.ForeColor = Color.White
    participantContinue.Font = New Font(participantContinue.Font, FontStyle.Bold)
    participantContinue.Text = "Resume"
    participantContinue.Visible = False
    CenterPanel.Controls.Add(participantContinue)
    AddHandler participantContinue.Click, AddressOf Participant_Resume

    participantTimer = New Timer
    participantTimer.Start()
    participantTimer.Enabled = True
    participantTimer.Interval = 1
    participantStopwatch = New Stopwatch
    participantStopwatch.Start()


    Dim storage As New StopwatchStorage()
    storage.Label = participantClock
    storage.Timer = participantTimer
    storage.Continuation = participantContinuation
    storage.Button = ParticipantStop
    storage.ParticipantContinueTimers = participantContinueTimers
    storage.ContinueBtn = participantContinue
    storage.ParticipantName = participantName
    storage.ParticipantOrder = participantLbl
    storage.Stopwatch = participantStopwatch
    _storage.Add(storage)
    AddHandler participantTimer.Tick, AddressOf Timer_Tick

End Sub


End Class
Public Class StopwatchStorage
Public Property Stopwatch As Stopwatch
Public Property Continuation As Stopwatch
Public Property ParticipantContinueTimers As TimeSpan
Public Property ParticipantName As TextBox
Public Property Label As Label
Public Property ParticipantOrder As Label
Public Property Timer As Timer
Public Property Button As Button
Public Property ContinueBtn As Button
End Class

应该发生的情况是，单击停止按钮时应该启动另一个计时器/跑表。当您单击“恢复”按钮时，秒表的值应该被添加回正在运行的计时器。 （它被添加到“participantContinueTimers”，然后添加回正在运行的计时器。）现在代码正在执行它应该做的事情，但是，它不是添加那个停止时钟的特定值，而是添加了停止点击然后重置。

有人可以解释一下如何让它工作，以便只添加一个停止的结果吗？

编辑：添加存储的方法。如果有更多代码，我必须将其托管在 SourceForge 或 Codeplex 上并从那里开始工作。

Answer 1

您不应将成员变量用于动态控件。通过这种方式，您将覆盖所有控件，只有最后一个获胜。相反，您应该在方法中单独创建它们。您还使用了参数records，但我没有看到循环它以创建多个StopwatchStorage 的代码。

Private Sub DrawControls(records As Integer)
    Dim participantLbl = New Label
    participantLbl.Location = New Point(5 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantLbl.Size = New Size(22, 20)
    participantLbl.TextAlign = ContentAlignment.MiddleCenter
    participantLbl.Text = records
    CenterPanel.Controls.Add(participantLbl)

    Dim participantName = New TextBox
    participantName.Location = New Point(31 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantName.Size = New Size(105, 20)
    CenterPanel.Controls.Add(participantName)

    Dim participantClock = New Label
    participantClock.Size = New Size(100, 20)
    participantClock.Name = "participantClock" & TotalParticipants
    participantClock.Location = New Point(139 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantClock.BorderStyle = BorderStyle.Fixed3D
    participantClock.TextAlign = ContentAlignment.MiddleRight
    CenterPanel.Controls.Add(participantClock)

    Dim ParticipantStop = New Button
    ParticipantStop.Size = New Size(63, 20)
    ParticipantStop.Location = New Point(245 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    ParticipantStop.BackColor = Color.Red
    ParticipantStop.ForeColor = Color.White
    ParticipantStop.Font = New Font(ParticipantStop.Font, FontStyle.Bold)
    ParticipantStop.Text = "Stop"
    CenterPanel.Controls.Add(ParticipantStop)
    AddHandler ParticipantStop.Click, AddressOf Participant_Stop


    Dim participantContinue = New Button
    participantContinue.Size = New Size(63, 20)
    participantContinue.Location = New Point(245 + (((records - 1) \ 15) * 321), 5 + (((records - 1) Mod 15) * 26))
    participantContinue.BackColor = Color.Green
    participantContinue.ForeColor = Color.White
    participantContinue.Font = New Font(participantContinue.Font, FontStyle.Bold)
    participantContinue.Text = "Resume"
    participantContinue.Visible = False
    CenterPanel.Controls.Add(participantContinue)
    AddHandler participantContinue.Click, AddressOf Participant_Resume

    Dim participantTimer = New Timer
    participantTimer.Start()
    participantTimer.Enabled = True
    participantTimer.Interval = 1
    participantStopwatch = New Stopwatch
    participantStopwatch.Start()


    Dim storage As New StopwatchStorage()
    storage.Label = participantClock
    storage.Timer = participantTimer
    storage.Continuation = participantContinuation
    storage.Button = ParticipantStop
    storage.ParticipantContinueTimers = participantContinueTimers
    storage.ContinueBtn = participantContinue
    storage.ParticipantName = participantName
    storage.ParticipantOrder = participantLbl
    storage.Stopwatch = participantStopwatch
    _storage.Add(storage)
    AddHandler participantTimer.Tick, AddressOf Timer_Tick
End Sub