如何在图表的x轴上设置日期格式？

Question

我编写了以下VB.NET代码，它将标准分数绘制为Windows窗体上日期和时间的函数。

Public Sub PopulateChart(ByVal PairId As Integer, ByVal SymbolA As String, ByVal SymbolB As String)
    Dim DateTimes As List(Of DateTime)
    Dim StandardScores As List(Of Double)
    Me.Visible = True
    Me.BringToFront()
    Me.Text = SymbolA & " " & SymbolB
    graStandardScores.Series("StandardScores").Points.Clear()
    DateTimes = GetStandardScoreDates(PairId)
    StandardScores = GetStandardScores(PairId)
    For i = 0 To StandardScores.Count - 1
        If Double.IsInfinity(StandardScores(i)) = False Then
            graStandardScores.Series("StandardScores").Points.AddXY(DateTimes(i), StandardScores(i))
        End If
    Next i
End Sub

每个点相隔30秒，数据跨越多天。我希望每天只有一个标签显示在x轴上，但也是每天每小时的标签。实现这一目标的最佳方法是什么？