RegularExpressionAttribute.FormatErrorMessage(String) Method
Definition
Important
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Formats the error message to display if the regular expression validation fails.
public:
override System::String ^ FormatErrorMessage(System::String ^ name);public override string FormatErrorMessage(string name);override this.FormatErrorMessage : string -> stringPublic Overrides Function FormatErrorMessage (name As String) As String- name
- String
The name of the field that caused the validation failure.
The formatted error message.
The current attribute is ill-formed.
The Pattern is not a valid regular expression.
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.
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, 10 |
| .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 |
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