ActiveReports 16 .NET Edition
ActiveReports 16 User Guide / Concepts / Page Report/RDL Report Concepts / Toolbox / Chart / Plots / Spiral Chart
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    Spiral Chart
    In This Topic

    The Spiral plot originates at the center of a circle and then progresses outward, arranging the categories across a radial line and encoding the data values into circular bars along the spiral path. The Spiral plot is suitable for comparing data values across categories using a spiral shape. The categories can be further split to represent data values as clusters or stacks. Spiral Plots are highly useful in showing large data sets, usually in displaying trends over an extended period. This makes Spiral Plots a good option for displaying periodic patterns.

    Simple Spiral Chart

    The simplest type of a spiral chart is quite similar to a bar chart showcased on a polar coordinate system. The Create Stacked Spiral Chart walkthrough showcases plotting the Sales Amount per Product Category.

    Simple Spiral Chart

    Simple Spiral Chart

    Stacked Spiral Chart

    A Stacked Spiral chart breaks down values of data into subcategories by placing corresponding circular subsections next to each other within the containing category. The Create Stacked Spiral Chart walkthrough showcases plotting the Sales Amount for each Sales Channel per Product Category.

    Stacked Spiral Chart

    Stacked Spiral Chart

    Stacked Percentage Spiral Chart

    A Stacked Percentage Spiral chart combines the stacked spiral plot and the Percentage axis scale. The chart indicates the contribution of each data values' sub-category to a containing category's total. The Create Stacked Percentage Spiral Chart walkthrough showcases plotting the share of Sales Channels' Sales Amount per Product Category.

    Stacked Spiral Chart

    Stacked Spiral Chart

    Spiral Plot Properties

    The plot properties discussed below can be accessed from the Properties Panel on selecting the Chart > Plot from the Report Explorer. You can access some of the important properties from the Plot's Smart Panel too. See Chart Smart Panels topic for more information. Both the Properties Panel and the Smart Panel can be accessed by right-clicking the plot in the design area.



    Indicates the color used to fill the chart area.



    The action to perform when the plot is clicked. The action can be a hyperlink, a bookmark, or a drill-through.


    The data labels for each chart.


    The line style for the borders. Includes LineColor, LineStyle, and LineWidth properties for the customization.


    The name of the plot. By default, a chart containing a single plot has the plot name as 'Plot1'.

    Tooltip Template

    Contains the tooltip template settings. You can choose from the list of predefined settings or set your own in the Expression Editor.



    The Clipping Mode determines how a plot extends within the plot area. The ClippingMode can be set to:


    The Line Aspect determines the line style that connects data points.


    The Opacity determines the opacity of areas filled with color. 100% opacity means that the plot fill color is opaque while 0% opacity means that the plot fill color is completely transparent.


    Overlays property is a collection for superimposing the data trend on a plot. For more information, see Trendlines topic.


    Rules control the appearance of plots based on specified conditions. For more information on conditions, see Rules topic.


    Represents how null or empty values should be shown in the plot - Gaps (default), Connected, or Zeros.


    Indicates the arc angle that defines the clockwise rotation of the plot. A full rotation makes 360 degrees. The Create Simple Spiral Chart walkthrough shows the chart StartAngle set to 90 degrees.


    Determines whether to display multiple data fields as a single data field. By default, the property is set to 'False'. 


    Category Encoding 

    The Category Encoding of a plot is a set of properties that determine the period over which the plot generates connected data points representing those above Data Values. The Category encoding includes the following properties.


    The Values property is the collection and takes the field as a category.


    The SortingField defines the order in which the categories are displayed. It takes the default same as the Values field, but you can also specify another field to sort the categories.


    The SortDirection defines the ascending or descending order in which the categories should be sorted.


    The SortingAggregate property specifies the aggregate to use for sorting the categories. 

    Colors Encoding

    The Colors Encoding enables the color legend of the Details or Category Encoding. It includes the following properties:


    Aggregates the value of Color expression.


    If set to True, the legend is displayed based on the value specified in Details encoding or Color encoding.


    The Values is the collection where the value of the Color expression is specified. However, the Spiral charts take the first item from the collection.

    Details Encoding

    The Details Encoding breaks down the data values into subcategories and produces additional groups. The Details property is the collection of items and each item includes the following properties that define the Details encoding:

    Values Encoding

    The Values encoding specifies the data values and represents the collection of items and each item includes the following properties.


    The Type property provides 'Simple' and 'Complex' options to choose from. However, for Spiral charts, 'Simple' is acceptable.


    The Value property is the collection and usually takes a bound field. However, the Spiral charts take the first item from the collection.


    To show aggregated values such as Average, Count, and Sum instead of individual values, specify an Aggregate function.

    Text Encoding

    The Text Encoding provides support of any dataset field in chart labels and tooltips and allows displaying additional info on the chart. When two text encodings are added, they are displayed by default with the ";" delimiter. A text encoding includes the following properties:


    Aggregates the value of the Text expression.


    Specifies whether this text is for a Label or a Tooltip Label. The label format is controlled with the chart's Labels > Template property or Tooltip Template property.

    The Template property can use both the predefined values and the added text encoding fields, for example:


    Template Key

    A unique key, used in the chart plot's Labels > Template and Tooltip Template to access the text encoding value.


    A field, constant or expression to be displayed.

    See Also