PostSharpAPI ReferencePost­Sharp.​Patterns.​ContractsRequired­Attribute
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RequiredAttribute Class

Custom attribute that, when added to a field, property or parameter, throws:

  • an ArgumentNullException if the target is assigned a null value;
  • an System.ArgumentOutOfRangeException if the target is assigned an empty or white-space string.
Inheritance
System.Object
RequiredAttribute
Namespace: PostSharp.Patterns.Contracts
Assembly: PostSharp.Patterns.Common.dll
Syntax
[HasConstraint]
public sealed class RequiredAttribute : LocationContractAttribute, ILocationLevelAspect, IAspect
Remarks

Error message is identified by RequiredErrorMessage.

Constructors

Name Description
RequiredAttribute()

Initializes a new RequiredAttribute.

Methods

Name Description
GetErrorMessage()

Gets unformatted error message as defined by the instance.

ValidateValueDynamic(Object, String, LocationKind, LocationValidationContext)

Validates a weakly-typed (boxed) value, typically the value of a dependency property or an attached property.

ValidateValueObject(Object, String, LocationKind, LocationValidationContext)
ValidateValueString(String, String, LocationKind, LocationValidationContext)