2 // RegularExpressionAttribute.cs
5 // Atsushi Enomoto <atsushi@ximian.com>
6 // Antoine Cailliau <a.cailliau@maximux.net>
8 // Copyright (C) 2008 Novell Inc. http://novell.com
9 // Copyright (C) 20011 Maximux Scris. http://maximux.net
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18 // permit persons to whom the Software is furnished to do so, subject to
19 // the following conditions:
21 // The above copyright notice and this permission notice shall be
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33 using System.Globalization;
34 using System.ComponentModel;
35 using System.Text.RegularExpressions;
37 namespace System.ComponentModel.DataAnnotations
41 [AttributeUsage (AttributeTargets.Property|AttributeTargets.Field|AttributeTargets.Parameter, AllowMultiple = false)]
43 [AttributeUsage (AttributeTargets.Property|AttributeTargets.Field, AllowMultiple = false)]
45 public class RegularExpressionAttribute : ValidationAttribute
47 public RegularExpressionAttribute (string pattern)
48 : base(GetDefaultErrorMessage)
51 throw new ArgumentNullException("pattern");
55 public string Pattern { get; private set; }
57 static string GetDefaultErrorMessage ()
59 return "The field {0} must match the regular expression {1}.";
62 public override string FormatErrorMessage (string name)
64 return string.Format (ErrorMessageString, name, Pattern);
67 // LAMESPEC: does not throw ValidationException when value does not match the regular expression
68 public override bool IsValid (object value)
73 string str = (string) value;
74 Regex regex = new Regex(Pattern);
75 return regex.IsMatch(str);