StripLine.Interval Egenskap

public:
 property double Interval { double get(); void set(double value); };

[System.ComponentModel.Bindable(true)]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.Attribute)]
public double Interval { get; set; }

[<System.ComponentModel.Bindable(true)>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.Attribute)>]
member this.Interval : double with get, set

Public Property Interval As Double

Egenskapsvärde

Ett double värde som representerar intervallet mellan bandlinjer. Standardvärdet är 0,0.

Attribut

BindableAttribute PersistenceModeAttribute

Exempel

I följande kodexempel visas tre program med bandlinjer. Först läggs vågräta bandlinjer till med återkommande intervall. För det andra läggs lodräta bandlinjer till för att markera helgdatapunkter. Slutligen läggs en icke-återkommande bandlinje till för att ange medelvärdet av datapunkterna i diagrammets första serie.

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);
        }
    }

Kommentarer

När du anger Interval egenskapen till värdet noll (0,0) visas en bandlinje med en bredd som anges av StripWidth egenskapen. När du anger Interval ett annat värde än noll visas flera bandlinjer. Den enhet som används för Interval egenskapen definieras av IntervalType egenskapen .