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.NET Framework 4.5.2+

RuleObjectExistsAttribute(String) Constructor

Initializes a new instance of the RuleObjectExistsAttribute class.

Namespace: DevExpress.Persistent.Validation

Assembly: DevExpress.Persistent.Base.v23.1.dll


public RuleObjectExistsAttribute(
    string criteria


Name Type Description
criteria String

A string value representing the criteria that must be satisfied by the target type objects.


The common rules of writing a criteria are described in the Ways to Build Criteria topic. In addition, you can use the following construction: PropertyName = '@PropertyName' (the operator is optional). @PropertyName represents a parameter that is set to the value of the PropertyName property of the currently validated object, when the rule is checked.

See Also