RegularExpressionAttribute(String) Constructor

Definition

Namespace:

System.ComponentModel.DataAnnotations

Assembly:

System.ComponentModel.Annotations.dll

Source:

RegularExpressionAttribute.cs

Initializes a new instance of the RegularExpressionAttribute class.

public:
 RegularExpressionAttribute(System::String ^ pattern);

public RegularExpressionAttribute (string pattern);

new System.ComponentModel.DataAnnotations.RegularExpressionAttribute : string -> System.ComponentModel.DataAnnotations.RegularExpressionAttribute

Public Sub New (pattern As String)

Parameters

pattern

String

The regular expression that is used to validate the data field value.

Exceptions

ArgumentNullException

pattern is null.

Examples

The following example shows how to apply the RegularExpressionAttribute to a data field. If validation fails, the code in the example displays the validation error message that is provided by Dynamic Data.

// Allow up to 40 uppercase and lowercase 
// characters. Use standard error.
[RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$")]
public object LastName;

' Allow up to 40 uppercase and lowercase 
' characters. Use standard error.
<RegularExpression("^[a-zA-Z''-'\s]{1,40}$")> _
Public LastName As Object