Pie Chart

The pie charts are used to show the breakdown of data into its constituents, i.e. parts of a whole. ShieldUI Pie chart is beautiful, interactive and are based on HTML5 & JavaScript.

pie

The chart from the image above is created with the following code:

<shield:ShieldChart ID="ShieldChart1" Width="580px" Height="400px" runat="server" 
    OnTakeDataSource="ShieldChart1_TakeDataSource"
    CssClass="chart">
    <PrimaryHeader Text="Browsers Popularity amongst Users"></PrimaryHeader>
    <ExportOptions AllowExportToImage="false" AllowPrint="false" />
    <TooltipSettings CustomPointText="{point.collectionAlias}:{point.y}"></TooltipSettings>
    <DataSeries>
        <shield:ChartPieSeries EnableValueXSorting="false" DataFieldY="Value" DataFieldX="Browser" CollectionAlias="Usage">
            <Settings EnablePointSelection="true"></Settings>
        </shield:ChartPieSeries>
    </DataSeries>
</shield:ShieldChart>
protected void ShieldChart1_TakeDataSource(object sender, Shield.Web.UI.ChartTakeDataSourceEventArgs e)
{
    List datasource = new List() 
    { 
        new Helper() { Browser = "Firefox", Value= 44.2 },
        new Helper() { Browser = "IE7", Value= 26.6 },
        new Helper() { Browser = "IE6", Value= 20 },
        new Helper() { Browser = "Chrome", Value= 3.1 },
        new Helper() { Browser = "Other", Value= 5.4 },
    };

    ShieldChart1.DataSource = datasource;
}

private class Helper
{
    public string Browser { get; set; }
    public double Value { get; set; }
}   
  • When the chart is bound to collection of objects the X values are got by the field which name is set into the DataFieldX property of the ChartPieSeries. The Y values are got by the field which name is set into the DataFieldY property.
  • The name that is shown in the legend is chosen via the CollectionAlias property of the ChartPieSeries.
  • By default all X values are sorted in order pie chart to be shown appropriately, however this behavior is controlled by the EnableValueXSorting property of the ChartPieSeries.
  • DataStart and DataStep properties control the start value of the x axis and explicit value for the interval between a data series member values.
  • Each part of the Pie chart can be showed as sliced by setting EnablePointSelection and SlicedOffset property.
  • All points from the ChartPieSeries are represented with ChartSeriesItem which belongs to the ChartPieSeries.Items collection.
    • The ChartPieSeries.Items can be added declarative without data binding.
    • The data binding and declarative approach can be mixed. However in order declarative items to be appended to the items created from the datasource the ShieldChart.AppendDataBoundItems property need to be set to "true".
  • All setting related to ChartPieSeries are contained into the ChartPieSeries.Settings object.
    • The series color can be set via Color property.
    • If the AddToLegend is set to false the series is not added into the legend.
    • The animation of the series can be controlled by ChartPieSeries.Settings.EnableAnimation and ChartPieSeries.Settings.AnimationDuration properties.
    • Each point from the series can be selected if the EnablePointSelection property is set to true.
    • All selected points can be customized by Settings.PointMark.ActiveSettings.PointSelectedState object properties.
    • From the Settings.PointMark.ActiveSettings.PointHoveredState object properties you can change the appearance of each part when the user hovers it.
    • Each series has related tooltip which can be customized via the Settings.Tooltip object.
    • Each point from the series can have related text, which appearance is controlled by Settings.DataPointText property. You can changeBackgroundColor, BorderColor, Color, Padding, and TextAngle of the corresponding data point text.