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Validator.TryValidateObject Method (Object, ValidationContext, ICollection<ValidationResult>, Boolean)

Silverlight

Determines whether the specified object is valid and, if requested, validates all of the properties of the object.

Namespace: System.ComponentModel.DataAnnotations
Assembly: System.ComponentModel.DataAnnotations (in System.ComponentModel.DataAnnotations.dll)

Syntax

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public static bool TryValidateObject(
	Object instance,
	ValidationContext validationContext,
	ICollection<ValidationResult> validationResults,
	bool validateAllProperties
)

Parameters

instance: Type: System.Object
The object to validate.

validationContext: Type: System.ComponentModel.DataAnnotations.ValidationContext
An object that contains information about the validation request.

validationResults: Type: System.Collections.Generic.ICollection<ValidationResult>
A collection to store validation results.

validateAllProperties: Type: System.Boolean
A value that indicates whether all immediate properties of the object are validated.

Return Value

Type: System.Boolean
true if the object is valid; otherwise, false.

Exceptions

Exception	Condition
ArgumentNullException	instance is null.
ArgumentException	instance does not equal the ObjectInstance on validationContext.

Remarks

The TryValidateObject method evaluates each ValidationAttribute attribute that is attached to the object type to determine if the object is valid. The method also checks whether each property that is marked with RequiredAttribute attribute has a value. If validateAllProperties is set to true, the method validates the property values of the object.

If validationResults is null, the method stops at the first validation failure. If validationResults is not null, the method evaluates all validation attributes and adds all of the failures to validationResults. Class-level validation attributes are evaluated only if the property-level attributes are valid.

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