Question

我想我对阵列列表的工作原理感到困惑，或者很可能是我的代码???

对于我的应用程序，我将数值输入数字向上/向下控件，然后单击按钮。该按钮将值添加到ArrayList。然后，我单击一个不同的按钮，将ArrayList中的所有值显示为富文本框控件。但值是重复的。在富文本框中看起来像这样的东西

100
  200个
  200个
  300个
  300个
  300个
  425个
  425个
  425个
  425

我在哪里指导错误？

lftMtrAccelRates.Add(LftMtr_Accel_Incr.Value)
        lftMtrAccelRates.TrimToSize()

Private Sub btnPrintArray_Click(sender As Object, e As EventArgs) Handles btnPrintArray.Click
    Dim message = String.Join(Environment.NewLine, lftMtrAccelRates.ToArray())
    rchTxtBox.Text = message
End Sub

Answer 1

 Dim rowNumber As Integer = 1
    Dim rowNumber2 As Integer = 1
    For Each row As DataGridViewRow In LftMtr_Data_Grid.Rows
        If row.IsNewRow Then Continue For
        row.HeaderCell.Value = "Step " & rowNumber
        LftMtr_Data_Grid.CurrentCell = LftMtr_Data_Grid.Rows(LftMtr_Data_Grid.RowCount - 1).Cells(0)
        LftMtr_Data_Grid.CurrentRow.Cells(0).Value = LftMtr_Accel_Incr.Value
        LftMtr_Data_Grid.CurrentRow.Cells(1).Value = LftMtr_Decel_Incr.Value
        LftMtr_Data_Grid.CurrentRow.Cells(2).Value = LftMtr_Speed_Incr.Value
        LftMtr_Data_Grid.CurrentRow.Cells(3).Value = test_Time_Incr1.Value

        Me.LftMtr_Data_Grid.Columns(0).DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter
        Me.LftMtr_Data_Grid.Columns(1).DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter
        Me.LftMtr_Data_Grid.Columns(2).DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter
        Me.LftMtr_Data_Grid.Columns(3).DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter
        rowNumber = rowNumber + 1
        'lftMtrAccelRates.Add(LftMtr_Data_Grid.CurrentRow.Cells(0).Value)
        'lftMtrAccelRates.Add(LftMtr_Accel_Incr.Value)
        'lftMtrAccelRates.TrimToSize()
        'txtboxArrayVal1.Text = lftMtrAccelRates.Capacity
    Next

我的ArrayList有什么“错误”？

1 个答案: