2 // StringLengthAttribute.cs
5 // Atsushi Enomoto <atsushi@ximian.com>
6 // Marek Habersack <grendel@twistedcode.net>
8 // Copyright (C) 2008-2010 Novell Inc. http://novell.com
12 // Permission is hereby granted, free of charge, to any person obtaining
13 // a copy of this software and associated documentation files (the
14 // "Software"), to deal in the Software without restriction, including
15 // without limitation the rights to use, copy, modify, merge, publish,
16 // distribute, sublicense, and/or sell copies of the Software, and to
17 // permit persons to whom the Software is furnished to do so, subject to
18 // the following conditions:
20 // The above copyright notice and this permission notice shall be
21 // included in all copies or substantial portions of the Software.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 using System.ComponentModel;
34 namespace System.ComponentModel.DataAnnotations
36 [AttributeUsage (AttributeTargets.Property|AttributeTargets.Field, AllowMultiple = false)]
37 public class StringLengthAttribute : ValidationAttribute
39 public int MaximumLength { get; private set; }
41 public int MinimumLength { get; set; }
43 public StringLengthAttribute (int maximumLength)
44 : base (GetDefaultErrorMessage)
47 if (maximumLength < 0)
48 throw new ArgumentOutOfRangeException ("maximumLength", String.Format ("Actual value was {0}", maximumLength));
50 MaximumLength = maximumLength;
53 static string GetDefaultErrorMessage ()
55 return "The field {0} must be a string with a maximum length of {1}.";
58 public override string FormatErrorMessage (string name)
61 return String.Format (ErrorMessageString, name, MaximumLength, MinimumLength);
63 return String.Format (ErrorMessageString, name, MaximumLength);
67 public override bool IsValid (object value)
72 string str = (string)value;
73 int max = MaximumLength;
75 int min = MinimumLength;
77 // LAMESPEC: documented to throw ArgumentOutOfRangeException
79 throw new InvalidOperationException ("The maximum length must be a nonnegative integer.");
82 throw new InvalidOperationException (
83 String.Format ("The maximum value '{0}' must be greater than or equal to the minimum value '{1}'.",
88 return len <= max && len >= min;
90 return str.Length <= max;