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Calculate Custom Summaries via Scripts

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This document describes how to evaluate custom summaries using report scripts within the End-User Report Designer.

Important

Report scripts are not secure. We recommend that you use expression bindings instead.

  • Create a new XRLabel, which is the only report control that supports custom summary calculations.

    The value range encompassed by the summary function within a report implies an appropriate band to display the result. For example, the Group Header or Group Footer bands are most appropriate to display the result of a summary that is calculated within a group.

    The label must be bound to any field that belongs to a data table involved in the script's calculations.

    Specify the value range within a report that is encompassed by the summary function and set the XRSummary.Running property of the object returned by the XRLabel.Summary property.

  • Set the XRSummary.Func property to SummaryFunc.Custom and assign custom scripts to the appropriate event handlers of the object returned by the XRLabel.Scripts property.

    The following event handlers are available.

    • XRLabelScripts.OnSummaryReset - Handle it to restore a current summary result to its default value (e.g., before traversing each group entry).
    • XRLabelScripts.OnSummaryRowChanged - Handle it to retrieve the current row from the report's data source (e.g., before obtaining the current detail band record).
    • XRLabelScripts.OnSummaryGetResult - Handle it to obtain the final summary result (e.g., before displaying it in a report). To complete a summary calculation, enable the Handled parameter.
See Also