### About Expressions

Expressions are special commands that you place inside of supporting controls to pull specific data from DataPage+ or the database into the report. Expressions always start with an equals sign (=) and are followed by the expression name. For example, if you wanted to display the part's name inside your report, your template must have a control that uses the =PartName expression.

Sample expressions in a template

For example, if you wanted to display a run chart inside a label, your label template must have a control that uses the =RunChart expression.

Sample expressions in a label template

These topics are covered in this section:

- Adding Expression to Supported Controls

- Adding Expression to the GridControl

- Expressions List