RequiredAttribute.IsValid Method (Object)


Checks that the value of the required data field is not empty.

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

public override bool IsValid(
	object value


Type: System.Object

The data field value to validate.

Return Value

Type: System.Boolean

true if validation is successful; otherwise, false.

Exception Condition

The data field value was null.

If the value is an empty string, the method returns false and a validation error is displayed.

Universal Windows Platform
Available since 10
.NET Framework
Available since 3.5
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