ActiveReports 13
Add Field Expressions
ActiveReports 13 > ActiveReports User Guide > How To > Section Report How To > Work with Report Controls > Add Field Expressions

In a section report, expressions can be used in the DataField property to specify textbox output in a report, such as date/time, mathematical calculations or conditional values. All field expressions used in the DataField property begin with the equals sign (=).

To use a mathematical expression

Set the DataField property of a textbox control to a mathematical calculation.

Example:

=UnitPrice+5

=Quantity-5

=Quantity*UnitPrice

=UnitPrice/QuantityPerUnit

To use a substring

Set the DataField property of a textbox control to the required substring. While setting up grouping, change the GroupHeader's DataField property to the same substring.

Example:

=ProductName.Substring(0, 1)

To use date/time

Set the DataField property of a textbox control similar to the following expression to display date/time values.

Example:

To create a conditional value

Set the DataField property of a textbox control to the conditional statement as desired.

Example:

=(UnitsInStock > 0)?"In Stock":"Backorder"

To concatenate fields

Set the DataField property of a textbox control similar to the following expression to display concatenated fields.

Example:

="There are " + UnitsInStock + " units of " + ProductName + " in stock."

=TitleOfCourtesy + " " + FirstName + " " + LastName

Note: ActiveReports automatically handles null values, replacing them with an empty string.

To round a calculation

Set the DataField Property of a textbox control like the following example.

Example:

=(double)System.Math.Round(UnitsInStock/10)

To use modular division

Set the DataField property of a textbox control like the following example to get the remainder (2 in this case).

Example: =22%(5)

To replace a null value

Set the DataField property of a textbox control like the following example to replace null with your own value.

Example:

=(UnitsInStock == System.DBNull.Value) ? "No Units In Stock" : UnitsInStock