StripLine.BackColor Property
Gets or sets the background color of the strip line.
Assembly: System.Web.DataVisualization (in System.Web.DataVisualization.dll)
You can set this property to any valid ARGB (alpha, red, green, blue) value.
To set a gradient for the strip line, set the BackColor and BackSecondaryColor properties.
If you set this color to "transparent"—in other words, set the alpha value to 0—no color will be assigned to the background of the element. As a result, the background will be transparent.
If the StripWidth property is set to 0.0, a line will be drawn and the BorderColor property will determine the color of the line, not this property.
The following code example demonstrates three applications of strip lines. First, horizontal strip lines are added at recurring intervals. Second, vertical strip lines are added to highlight weekend data points. Lastly, a non-recurring strip line is added to denote the mean of the data points in the first series of the chart.
Imports System.Web.UI.DataVisualization.Charting Public Partial Class StripLines Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) ' Add chart data before adding strip lines. AddChartData() ' Adds repeating horizontal strip lines. AddHorizRepeatingStripLines() ' Highlights weekend points using strip lines. HighlightWeekendsWithStripLines() ' Adds a threshold line using strip lines. AddThresholdStripLine() End Sub ''' <summary> ''' Adds a week of data with values between 20 and 35. ''' </summary> Private Sub AddChartData() ' Declare new random variable Dim rand As New Random() For i As Integer = 0 To 6 ' Add a week of data chart1.Series(0).Points.AddXY(DateTime.Now.AddDays(i), rand.[Next](20, 35)) Next End Sub ''' <summary> ''' Adds repeating horizontal strip lines at intervals of 5. ''' </summary> Private Sub AddHorizRepeatingStripLines() ' Instantiate new strip line Dim stripLine1 As New StripLine() stripLine1.StripWidth = 2.5 stripLine1.Interval = 5 ' Consider adding transparency so that the strip lines are lighter stripLine1.BackColor = Color.FromArgb(120, Color.Red) ' Add the strip line to the chart chart1.ChartAreas(0).AxisY.StripLines.Add(stripLine1) End Sub ''' <summary> ''' Adds strip lines to highlight weekend values. ''' </summary> Private Sub HighlightWeekendsWithStripLines() ' Set strip line to highlight weekends Dim stripLine2 As New StripLine() stripLine2.BackColor = Color.FromArgb(120, Color.Gold) stripLine2.IntervalOffset = -1.5 stripLine2.IntervalOffsetType = DateTimeIntervalType.Days stripLine2.Interval = 1 stripLine2.IntervalType = DateTimeIntervalType.Weeks stripLine2.StripWidth = 2 stripLine2.StripWidthType = DateTimeIntervalType.Days ' Add strip line to the chart chart1.ChartAreas(0).AxisX.StripLines.Add(stripLine2) ' Set the axis label to show the name of the day ' This is done in order to demonstrate that weekends are highlighted chart1.ChartAreas(0).AxisX.LabelStyle.Format = "ddd" End Sub ''' <summary> ''' Adds a horizontal threshold strip line at the calculated mean ''' value of all data points in the first series of the chart. ''' </summary> Private Sub AddThresholdStripLine() Dim stripLine3 As New StripLine() ' Set threshold line so that it is only shown once stripLine3.Interval = 0 ' Set the threshold line to be drawn at the calculated mean of the first series stripLine3.IntervalOffset = chart1.DataManipulator.Statistics.Mean(chart1.Series(0).Name) stripLine3.BackColor = Color.DarkGreen stripLine3.StripWidth = 0.25 ' Set text properties for the threshold line stripLine3.Text = "Mean" stripLine3.ForeColor = Color.Black ' Add strip line to the chart chart1.ChartAreas(0).AxisY.StripLines.Add(stripLine3) End Sub End Class
Available since 4.0