# Expression Editor Elements

## Content



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.

![](https://cdn.mescius.io/document-site-files/images/51584797-3d29-4e1f-83ce-1748273f126b/images/ee-elements.png)

### C1ExpressionEditor

**Expression TextBox**: A text box that 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.