StripLine.IntervalOffset 属性
定义
获取或设置网格线、刻度线、带状线和轴标签的偏移量。Gets or sets the offset of grid lines, tick marks, strip lines and axis labels.
public:
property double IntervalOffset { double get(); void set(double value); };
[System.ComponentModel.Bindable(true)]
[System.ComponentModel.TypeConverter(typeof(System.Web.UI.DataVisualization.Charting.AxisLabelDateValueConverter))]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.Attribute)]
public double IntervalOffset { get; set; }
[<System.ComponentModel.Bindable(true)>]
[<System.ComponentModel.TypeConverter(typeof(System.Web.UI.DataVisualization.Charting.AxisLabelDateValueConverter))>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.Attribute)>]
member this.IntervalOffset : double with get, set
Public Property IntervalOffset As Double
属性值
一个 double 值,该值表示间隔偏移量。A double value that represents the interval offset.
- 属性
示例
下面的代码示例演示了条带线的三个应用程序。The following code example demonstrates three applications of strip lines. 首先,按重复间隔添加水平条带线。First, horizontal strip lines are added at recurring intervals. 其次,将添加垂直条带线以突出显示周末数据点。Second, vertical strip lines are added to highlight weekend data points. 最后,添加一个非重复条带线,以表示图表第一个序列中数据点的平均值。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
public partial class StripLines : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
// Add chart data
AddChartData();
// Adds repeating horizontal strip lines.
AddHorizRepeatingStripLines();
// Highlights weekend points using strip lines.
HighlightWeekendsWithStripLines();
// Adds a threshold line using strip lines.
AddThresholdStripLine();
}
/// <summary>
/// Adds a week of data with values between 20 and 35.
/// </summary>
private void AddChartData()
{
// Declare new random variable
Random rand = new Random();
// Add a week of data
for (int i = 0; i < 7; i++)
{
chart1.Series[0].Points.AddXY(DateTime.Now.AddDays(i), rand.Next(20,35));
}
}
/// <summary>
/// Adds repeating horizontal strip lines at intervals of 5.
/// </summary>
private void AddHorizRepeatingStripLines()
{
// Instantiate new strip line
StripLine stripLine1 = new StripLine();
stripLine1.StripWidth = 0;
stripLine1.BorderColor = Color.Black;
stripLine1.BorderWidth = 3;
stripLine1.Interval = 5;
// Consider adding transparency so that the strip lines are lighter
stripLine1.BackColor = Color.FromArgb(120, Color.Red);
stripLine1.BackSecondaryColor = Color.Black;
stripLine1.BackGradientStyle = GradientStyle.LeftRight;
// Add the strip line to the chart
chart1.ChartAreas[0].AxisY.StripLines.Add(stripLine1);
}
/// <summary>
/// Adds strip lines to highlight weekend values.
/// </summary>
private void HighlightWeekendsWithStripLines()
{
// Set strip line to highlight weekends
StripLine stripLine2 = 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";
}
/// <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 void AddThresholdStripLine()
{
StripLine stripLine3 = 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);
}
}
注解
次要刻度线和网格线的间隔偏移量从不受对象属性的值的影响 IntervalOffset Axis 。The interval offset of minor tick marks and grid lines is never affected by the value of the IntervalOffset property of the Axis object.
IntervalOffset属性设置定义偏移量的度量单位。The IntervalOffset property setting defines the units of measurement of the offset.
Interval可以为负值。The Interval can be a negative value.
默认值为 Auto (0) 。The default value is Auto (0).