最简单的方法是添加 2-3 个标签，使用轨迹栏的高度/宽度/顶部/左侧和标签的组合，您应该能够相对地定位它们而没有太多麻烦？
编辑：另外，这篇文章似乎显示了一个与您描述的要求相同的自定义实现？
我所做的是修改图表并将其 X 轴刻度用作 TrackBar 的刻度（参见图像链接 [我将嵌入图像，但无法使其工作]）。图像的上半部分是滑块，下半部分是常规图表对象，其属性已更改，因此唯一可见的是它的 X 轴。
这是 TrackBar 和 Chart 的 VS2010 表单设计器代码。此示例将为您提供 0 到 100 的比例，可以轻松调整其大小以与您的轨迹栏对齐。您甚至可以将两个控件放在一个面板中，以便可以轻松地将它们调整为一个（代码是 VB 而不是 C#）：
Dim ChartArea2 As System.Windows.Forms.DataVisualization.Charting.ChartArea = New System.Windows.Forms.DataVisualization.Charting.ChartArea()
Dim Legend2 As System.Windows.Forms.DataVisualization.Charting.Legend = New System.Windows.Forms.DataVisualization.Charting.Legend()
Dim Series2 As System.Windows.Forms.DataVisualization.Charting.Series = New System.Windows.Forms.DataVisualization.Charting.Series()
Dim DataPoint2 As System.Windows.Forms.DataVisualization.Charting.DataPoint = New System.Windows.Forms.DataVisualization.Charting.DataPoint(0.0R, 0.0R)
Me.chart_slider = New System.Windows.Forms.DataVisualization.Charting.Chart()
Me.TrackBar1 = New System.Windows.Forms.TrackBar()
CType(Me.chart_slider, System.ComponentModel.ISupportInitialize).BeginInit()
CType(Me.TrackBar1, System.ComponentModel.ISupportInitialize).BeginInit()
Me.SuspendLayout()
'
'chart_slider
'
Me.chart_slider.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
Or System.Windows.Forms.AnchorStyles.Left) _
Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
Me.chart_slider.BackColor = System.Drawing.Color.Transparent
ChartArea2.AxisX.LabelAutoFitMaxFontSize = 8
ChartArea2.AxisX.LabelAutoFitMinFontSize = 8
ChartArea2.AxisX.LineColor = System.Drawing.Color.Transparent
ChartArea2.AxisX.MajorGrid.Enabled = False
ChartArea2.AxisX.Maximum = 100.0R
ChartArea2.AxisX.Minimum = 0.0R
ChartArea2.AxisY.Interval = 1.0R
ChartArea2.AxisY.LineWidth = 0
ChartArea2.AxisY.MajorGrid.Enabled = False
ChartArea2.AxisY.MajorTickMark.Enabled = False
ChartArea2.AxisY.Maximum = 0.0R
ChartArea2.AxisY.Minimum = 0.0R
ChartArea2.AxisY.TitleForeColor = System.Drawing.Color.Transparent
ChartArea2.BackColor = System.Drawing.Color.Transparent
ChartArea2.InnerPlotPosition.Auto = False
ChartArea2.InnerPlotPosition.Height = 5.0!
ChartArea2.InnerPlotPosition.Width = 100.0!
ChartArea2.Name = "ChartArea1"
Me.chart_slider.ChartAreas.Add(ChartArea2)
Legend2.Enabled = False
Legend2.Name = "Legend1"
Me.chart_slider.Legends.Add(Legend2)
Me.chart_slider.Location = New System.Drawing.Point(186, 426)
Me.chart_slider.Name = "chart_slider"
Series2.ChartArea = "ChartArea1"
Series2.Legend = "Legend1"
Series2.Name = "Series1"
Series2.Points.Add(DataPoint2)
Me.chart_slider.Series.Add(Series2)
Me.chart_slider.Size = New System.Drawing.Size(441, 31)
Me.chart_slider.TabIndex = 160
Me.chart_slider.Text = "Chart1"
'
'TrackBar1
'
Me.TrackBar1.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
Or System.Windows.Forms.AnchorStyles.Left) _
Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
Me.TrackBar1.Location = New System.Drawing.Point(191, 398)
Me.TrackBar1.Margin = New System.Windows.Forms.Padding(3, 3, 3, 0)
Me.TrackBar1.Name = "TrackBar1"
Me.TrackBar1.RightToLeftLayout = True
Me.TrackBar1.Size = New System.Drawing.Size(423, 45)
Me.TrackBar1.TabIndex = 1
'
'Form1
'
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(690, 498)
Me.Controls.Add(Me.TrackBar1)
Me.Controls.Add(Me.chart_slider)
Me.Name = "Form1"
Me.Text = "Form1"
CType(Me.chart_slider, System.ComponentModel.ISupportInitialize).EndInit()
CType(Me.TrackBar1, System.ComponentModel.ISupportInitialize).EndInit()
Me.ResumeLayout(False)
Me.PerformLayout()