UnaryOperator Class

An unary operator which performs an operation on only one expression.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v18.2.dll

Declaration

C#

public class UnaryOperator :
    CriteriaOperator

VB.NET

Public Class UnaryOperator
    Inherits CriteriaOperator

Related API Members

The following members return UnaryOperator objects:

Library	Related API Members
Cross-Platform Class Library	CriteriaOperator.IsNotNull()
	CriteriaOperator.IsNull()
	CriteriaOperator.Not()
	UnaryOperator.Clone()
Windows 10 App Controls	CriteriaOperator.IsNotNull()
	CriteriaOperator.IsNull()
	CriteriaOperator.Not()

Remarks

To create an unary operator, create a new instance of the UnaryOperator class with the specified settings. The UnaryOperator.OperatorType property specifies the type of the unary operator.

For more information on building criteria, see Creating Criteria.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the UnaryOperator class.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

XDL_how-to-delete-all-criteria-corresponding-to-a-particular-field-from-criteriaoperator-e3396/CS/PatchCriteriaExample/Filtering/CriteriaPatcherSkipProperties.cs#L66

public override CriteriaOperator Visit(UnaryOperator theOperator) {
    theOperator = (UnaryOperator)base.Visit(theOperator);

VB.NET

XDL_how-to-delete-all-criteria-corresponding-to-a-particular-field-from-criteriaoperator-e3396/VB/PatchCriteriaExample/Filtering/CriteriaPatcherSkipProperties.vb#L93

Public Overrides Function Visit(ByVal theOperator As UnaryOperator) As CriteriaOperator
    theOperator = CType(MyBase.Visit(theOperator), UnaryOperator)

Inheritance

Object

CriteriaOperator

UnaryOperator

NotOperator

NullOperator