StripLine.IntervalType 屬性

public:
 property System::Web::UI::DataVisualization::Charting::DateTimeIntervalType IntervalType { System::Web::UI::DataVisualization::Charting::DateTimeIntervalType get(); void set(System::Web::UI::DataVisualization::Charting::DateTimeIntervalType value); };

[System.ComponentModel.Bindable(true)]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.Attribute)]
public System.Web.UI.DataVisualization.Charting.DateTimeIntervalType IntervalType { get; set; }

[<System.ComponentModel.Bindable(true)>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.Attribute)>]
member this.IntervalType : System.Web.UI.DataVisualization.Charting.DateTimeIntervalType with get, set

Public Property IntervalType As DateTimeIntervalType

屬性值

表示間隔類型的 DateTimeIntervalType 列舉值。 預設值是 Auto。

屬性

BindableAttribute PersistenceModeAttribute

範例

下列程式碼範例示範三個等量線的應用程式。 首先，水準帶狀線會以週期性間隔新增。 其次，會新增垂直帶狀線來醒目提示週末資料點。 最後，加入非週期性帶狀線，表示圖表第一個數列中資料點的平均數。

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);
        }
    }

備註

間隔類型可以設定為 Auto ，在此情況下，類型相依于：繪製物件的 X 值或 Y 數值型別 DataPoint - 視物件所屬的座標軸 StripLine 和座標軸刻度而定。

屬性 Interval 會決定繪製帶狀或線條的頻率。