RequiredAttribute.IsValid(Object) Method

Definition

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

C#
public override bool IsValid (object value);
C#
public override bool IsValid (object? value);

Parameters

value
Object

The data field value to validate.

Returns

true if validation is successful; otherwise, false.

Exceptions

The data field value was null.

Remarks

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

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0 (package-provided), 2.1 (package-provided)
UWP 10.0