IsValid Method (Object)
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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.


The data field value was null.

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

.NET Framework

Supported in: 4, 3.5 SP1

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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