Report parameters

You can define parameters in a report. Parameter is a variable, the value of which can be defined both in a report itself and outside of it (a program, calling a report can transfer parameters values into it. See details in "Programmer's manual"). A parameter can be used in expressions and be displayed in report objects like the "Text" object.

Most common methods of using parameters:

• data filtering by condition set in a parameter;
• printing parameter value in a report.

A parameter has the following properties:

Property	Description
Name	Parameter's name can have any symbols except dot ".".
DataType	Parameter data type.
Expression	Expression which returns parameter's value. More details about expressions can be found in the "Expression" chapter. This expression will be processed when calling a parameter.
Value	Parameter value. This property is not available in the designer and can be filled programmatically.

You have to set up "Name" and "DataType" properties. The "Expression" property can be left empty. In this case parameter's value should be passed programmatically.

To add a parameter, you should open the window "Data". Click on the green icon with a plus sign in front of Parameters node. After that, set the above parameters in the "Properties" window. Now, you can drag a parameter to the desired location on the report page, or use it to filter the data.

To remove a parameter, use the red icon with a minus sign.