RegularExpressionAttribute.FormatErrorMessage Method (String)


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Formats the error message to display if the regular expression validation fails.

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

public override string FormatErrorMessage(
	string name


Type: System.String

The name of the field that caused the validation failure.

Return Value

Type: System.String

The formatted error message.

The FormatErrorMessage creates the error message by using the name of the data field that caused the validation failure. You can override this method in custom validation attributes to customize how errors are created or to provide a more complex message that contains parameters that you evaluate at run time.

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 3.0
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