RuleBaseAttribute.SkipNullOrEmptyValues Property

Specifies whether the current rule is checked for the properties that are set to null (Nothing in VB), an empty string (for string type propeties) or a minimal date (for DateTime type properties).

Namespace: DevExpress.Persistent.Validation

Assembly: DevExpress.Persistent.Base.v24.2.dll

NuGet Package: DevExpress.Persistent.Base

Declaration

C#

public bool SkipNullOrEmptyValues { get; set; }

VB.NET

Public Property SkipNullOrEmptyValues As Boolean

Property Value

Type	Description
Boolean	true if null-like values are not checked by the current rule; otherwise, false.

Remarks

When defining a rule, you can specify whether to consider the properties that are set to null, an empty string (for string type propeties) or a minimal date (for DateTime type properties) when checking the rule. To set the required behavior for a rule that is defined via a validation attribute, use the named SkipNullOrEmptyValues parameter.

C#

[RuleUniqueValue(DefaultContexts.Save, SkipNullOrEmptyValues = false)]
public string UniqueValue { 
   //...
}

VB.NET

<RuleUniqueValue(DefaultContexts.Save, SkipNullOrEmptyValues := False)> _
Public Property UniqueValue() As String
   '...
End Property

By default, SkipNullOrEmptyValues is set to false in the RuleRequiredField rule; in the remaning validation rules, it is set to true.

The SkipNullOrEmptyValues behavior specified for a validation rule in code is set for the SkipNullOrEmptyValues property of the Application Model’s IModelRuleBase node. So, you can change this behavior directly in the Model Editor.

Implements

SkipNullOrEmptyValues