VB.NET图表X轴没有正确格式化

Question

下面的代码使用3个图表区域来制作x-y散点图，并且x轴值通过数据操纵器按升序成功排序。但是，x轴标签未正确格式化为两个小数点精度。有什么建议？我之前已经成功地格式化了x轴和y轴，但有些东西否定了这个功能（？）

Dim chart2 As New Chart
chart2.Invalidate()
chart2.ChartAreas.Clear()
chart2.Legends.Clear()
chart2.Series.Clear()
Chart2.Width = 400
chart2.Height = 800
chart2.Top = 30
Chart2.Left = 10
Chart2.Visible = True
Chart2.Enabled = True

Dim numvalidpoints As Integer = 0
Controls.Add(chart2)
For k = 1 To 3
    numvalidpoints = 10
    Cnt = -1
    Dim yValues(numvalidpoints - 1) As Double
    Dim xValues(numvalidpoints - 1) As String
    Dim delta As Single = 2 * Math.PI / numvalidpoints
    For j = 0 To numvalidpoints - 1
        Cnt += 1
        yValues(Cnt) = Rnd()
        xValues(Cnt) = yValues(Cnt)
    Next
    chart2.Series.Add(k - 1)
    chart2.Series(k - 1).ChartType = SeriesChartType.Point '.Pie
    chart2.Series(k - 1).IsXValueIndexed = False
    chart2.Series(k - 1).Points.DataBindXY(xValues, yValues)
    chart2.ChartAreas.Add(k - 1)
    chart2.Series(k - 1).ChartArea = CStr(k - 1)
    'chart2.ChartAreas(k - 1).AxisX.IntervalAutoMode = True
    'chart2.ChartAreas(k - 1).AxisY.IntervalAutoMode = True
    'chart2.ChartAreas(k - 1).AxisX.IsLabelAutoFit = True
    'chart2.ChartAreas(k - 1).AxisY.IsLabelAutoFit = True
    chart2.ChartAreas(k - 1).AxisX.IsMarginVisible = False
    chart2.ChartAreas(k - 1).AxisX.IsLabelAutoFit = True
    'chart2.Series(k - 1).Sort(PointSortOrder.Ascending, "X")
    chart2.DataManipulator.Sort(PointSortOrder.Ascending, "AxisLabel", k - 1)
    'Chart2.ChartAreas(k - 1).AxisX.MajorGrid.Enabled = False
    'Chart2.ChartAreas(k - 1).AxisY.MajorGrid.Enabled = False
    'Chart2.ChartAreas(k - 1).AxisX.LabelStyle.Font = New System.Drawing.Font("Arial", 75, System.Drawing.FontStyle.Regular)
    'Chart2.ChartAreas(k - 1).AxisY.LabelStyle.Font = New System.Drawing.Font("Arial", 75, System.Drawing.FontStyle.Regular)
    chart2.ChartAreas(k - 1).AxisX.LabelStyle.Format = "N2"
    chart2.ChartAreas(k - 1).AxisY.LabelStyle.Format = "N2"
Next k
'Chart2.Refresh()
'Chart2.Invalidate()
chart2.BringToFront()