RegularExpressionAttribute Constructor (String)


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Initializes a new instance of the RegularExpressionAttribute class.

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

public RegularExpressionAttribute(
	string pattern


Type: System.String

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

Exception Condition

pattern is null.

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.
public object LastName;

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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