StripLine.IntervalOffset Propriedade

Definição

Namespace:

System.Web.UI.DataVisualization.Charting

Assembly:

System.Web.DataVisualization.dll

Obtém ou define o deslocamento de linhas de grade, marcas de escala, faixas e rótulos de eixo.

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

Valor da propriedade

Double

Um valor double que representa o deslocamento do intervalo.

Atributos

BindableAttribute TypeConverterAttribute PersistenceModeAttribute

Exemplos

O exemplo de código a seguir demonstra três aplicativos de linhas de faixa. Primeiro, as linhas de faixa horizontal são adicionadas em intervalos recorrentes. Em segundo lugar, as linhas de faixa vertical são adicionadas para realçar os pontos de dados do fim de semana. Por fim, uma faixa não recorrente é adicionada para denotar a média dos pontos de dados na primeira série do gráfico.

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);  
        }  
    }  

Comentários

O deslocamento de intervalo de marcas de escala secundárias e linhas de grade nunca é afetado pelo valor da IntervalOffset propriedade do Axis objeto.

A IntervalOffset configuração da propriedade define as unidades de medida do deslocamento.

O Interval pode ser um valor negativo.

O valor padrão é Auto (0).