Expression Editor comprises two components.

• C1ExpressionEditor: Contains an expression text box where you can type expressions.
• C1ExpressionEditorPanel: Displays a quick access toolbar containing Arithmetic and Logical operator buttons, and a categorized view of built-in functions, operators, and constants.

The following image illustrates constituting components of Expression Editor control and their respective elements.

C1ExpressionEditor

Expression TextBox: Enables user to create and edit expressions.

Error Box: Shows the error information for the entered expression.

C1ExpressionEditorPanel

Operator Buttons: Buttons that represent shortcuts for operators.

Category Selection: A tree view which contains available functions, operators, fields and constants.

Items: A list box that lists the items selected from the Category Selection section.

Description Panel: A panel that displays the description of the item selected from the Category Selection section.