StripLine.IntervalOffset 屬性
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
取得或設定格線、刻度標記、帶狀線與座標軸標籤的位移。
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, setPublic Property IntervalOffset As Double屬性值
表示間隔位移的 double 值。
- 屬性
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，會加入非週期性帶狀線，以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
次要刻度和格線的間隔位移永遠不會受到 IntervalOffset 物件的 屬性值 Axis 影響。
屬性 IntervalOffset 設定會定義位移的度量單位。
Interval可以是負值。
預設值為 Auto (0) 。
