CalculatedField.Expression Property

Specifies the expression of the current calculated field.

Namespace: DevExpress.Snap.Core.API

Assembly: DevExpress.Snap.v20.1.Core.dll


public string Expression { get; set; }
Public Property Expression As String

Property Value

Type Description

A String value.


Use the Expression property to specify the expression for the calculated field. In the Snap project, this property provides access to the Expression Editor.


For expressions, numerous date-time, logical, math and string functions, operators and constants are supported. For a complete list of these functions, refer to Expressions.

To refer to a data field (returned by the CalculatedField.DataSource and CalculatedField.DataMember properties) within an expression, enclose its name in [square brackets]. Parameters are inserted using the "Parameters." prefix before their names.

Date-time constants must be wrapped in #hashes# ([OrderDate] >= #1/1/2009#). To represent a null reference (one that does not refer to any object), use a question mark ([Region] != ?). And, to denote strings, use 'apostrophes', otherwise, an error occurs.

The type of value returned by a calculated field is defined by its CalculatedField.FieldType property.

A calculated field's expression cannot evaluate the values of other calculated fields.


See Also