在网上文档中找了一段示例代码，如下
Private XRangeSelector As C1.Win.Chart.Interaction.RangeSelectorPublic Sub New() InitializeComponent() SetupCharts()End SubPublic Sub SetupRangeSelector() If XRangeSelector IsNot Nothing Then Return End If ' add X-RangeSelector XRangeSelector = New C1.Win.Chart.Interaction.RangeSelector(FlexChart2) AddHandler XRangeSelector.ValueChanged, AddressOf XRangeSelector_ValueChangedEnd SubPrivate Sub XRangeSelector_ValueChanged(sender As Object, e As EventArgs) FlexChart1.AxisX.Min = XRangeSelector.LowerValue FlexChart1.AxisX.Max = XRangeSelector.UpperValueEnd SubPrivate Sub SetupCharts() Dim rnd = New Random() Dim pointsCount = rnd.[Next](1, 30) Dim temperaturePoints = New List(Of DataItem)() Dim [date] As New DateTime(2016, 1, 1) While [date].Year = 2016 Dim newItem = New DataItem() newItem.[Date] = [date] If [date].Month <= 8 Then newItem.MaxTemp = rnd.[Next](3 * [date].Month, 4 * [date].Month) Else newItem.MaxTemp = rnd.[Next]((13 - [date].Month - 2) * [date].Month, (13 - [date].Month) * [date].Month) End If newItem.MinTemp = newItem.MaxTemp - rnd.[Next](6, 8) newItem.MeanTemp = (newItem.MaxTemp + newItem.MinTemp) / 2 newItem.MeanPressure = rnd.[Next](980, 1050) newItem.Presipitation = If(rnd.[Next](5) = 1, rnd.[Next](0, 20), 0) temperaturePoints.Add(newItem) [date] = [date].AddDays(1) End While 'Setup flexChart1 FlexChart1.BeginUpdate() FlexChart1.ChartType = C1.Chart.ChartType.Line FlexChart1.Series.Clear() FlexChart1.BindingX = "Date" FlexChart1.Series.Add(New Series() With { .Name = "MeanTemp", .Binding = "MeanTemp"}) FlexChart1.Series.Add(New Series() With { .Name = "MaxTemp", .Binding = "MaxTemp"}) FlexChart1.Series.Add(New Series() With { .Name = "MinTemp", .Binding = "MinTemp"}) FlexChart1.DataSource = temperaturePoints.ToArray() FlexChart1.EndUpdate() 'Setup flexChart2 FlexChart2.BeginUpdate() FlexChart2.ChartType = C1.Chart.ChartType.Line FlexChart2.Series.Clear() FlexChart2.BindingX = "Date" FlexChart2.Series.Add(New Series() With { .Name = "MeanTemp", .Binding = "MeanTemp"}) FlexChart2.DataSource = temperaturePoints.ToArray() FlexChart2.EndUpdate()End SubClass DataItem Public Property MaxTemp() As Integer Get Return m_MaxTemp End Get Set m_MaxTemp = Value End Set End Property Private m_MaxTemp As Integer Public Property MinTemp() As Integer Get Return m_MinTemp End Get Set m_MinTemp = Value End Set End Property Private m_MinTemp As Integer Public Property MeanTemp() As Integer Get Return m_MeanTemp End Get Set m_MeanTemp = Value End Set End Property Private m_MeanTemp As Integer Public Property MeanPressure() As Integer Get Return m_MeanPressure End Get Set m_MeanPressure = Value End Set End Property Private m_MeanPressure As Integer Public Property Presipitation() As Integer Get Return m_Presipitation End Get Set m_Presipitation = Value End Set End Property Private m_Presipitation As Integer Public Property [Date]() As DateTime Get Return m_Date End Get Set m_Date = Value End Set End Property Private m_Date As DateTimeEnd ClassPrivate Sub FlexChart2_Rendered(sender As Object, e As RenderEventArgs) SetupRangeSelector() FlexChart1_Rendered(sender, e)End SubPrivate Sub FlexChart1_Rendered(sender As Object, e As RenderEventArgs) Dim flexChart = TryCast(sender, FlexChart) If flexChart Is Nothing Then Return End If Using pen = New Pen(New SolidBrush(Color.LightGray)) Dim rect = New Rectangle(CInt(flexChart.PlotRect.X), CInt(flexChart.PlotRect.Y), CInt(flexChart.PlotRect.Width), CInt(flexChart.PlotRect.Height)) e.Graphics.DrawRectangle(pen, rect) End UsingEnd Sub
效果图如下实际代码在我的WINFORM里如下，求助，下面那个缩略里为啥没有课拖动控制缩放的条
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