Refer to the CustomFunctions class description for information on how to implement custom expression functions in reporting applications.
The Report Designer's Expression Editor provides functions, operators, data source fields, report elements, constants, and variables to construct expressions.
The Expression Editor highlights an expression's syntax and supports intelligent code completion (it suggests functions and available data elements as you type).
The Expression Editor displays all the errors it finds in the specified expression.
The Report Designer's FilterString Editor allows you to specify the FilterString property of a report, XRCrossTab, or XRChart's Series.
The FilterString Editor provides a visual interface where you can use an unlimited number of conditions and combine them with logical operators to create filter criteria. You can also switch to the Text mode and type a filter string.
The FilterString Editor highlights an expression's syntax and supports intelligent code completion (it suggests functions and available data elements as you type).
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