XPBaseObject.Evaluate(String) Method

Evaluates the specified string expression against the current instance of the persistent object.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v23.2.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap, DevExpress.Xpo

NuGet Package: DevExpress.Xpo

Declaration

C#

public object Evaluate(
    string expression
)

VB.NET

Public Function Evaluate(
    expression As String
) As Object

Parameters

Name	Type	Description
expression	String	A string that specifies the expression to evaluate.

Returns

Type	Description
Object	A value evaluated.

Remarks

This method allows you to evaluate a specific expression against the current instance of the persistent object.

In the expression parameter, you can use numerous functions and arithmetic and logic operators. These are the same functions and operators that are encapsulated by the CriteriaOperator class’ descendants. For instance, if a persistent object contains fields ‘A’ and ‘B’ you can use the “(A+B)*(A+B)” expression to calculate the sum of these fields squared.