2 // System.Configuration.StringValidator.cs
5 // Lluis Sanchez Gual (lluis@novell.com)
7 // Permission is hereby granted, free of charge, to any person obtaining
8 // a copy of this software and associated documentation files (the
9 // "Software"), to deal in the Software without restriction, including
10 // without limitation the rights to use, copy, modify, merge, publish,
11 // distribute, sublicense, and/or sell copies of the Software, and to
12 // permit persons to whom the Software is furnished to do so, subject to
13 // the following conditions:
15 // The above copyright notice and this permission notice shall be
16 // included in all copies or substantial portions of the Software.
18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
29 namespace System.Configuration
31 public class StringValidator: ConfigurationValidatorBase
33 char[] invalidCharacters;
37 public StringValidator (int minLength)
39 this.minLength = minLength;
40 maxLength = int.MaxValue;
43 public StringValidator (int minLength, int maxLength)
45 this.minLength = minLength;
46 this.maxLength = maxLength;
49 public StringValidator (int minLength, int maxLength, string invalidCharacters)
51 this.minLength = minLength;
52 this.maxLength = maxLength;
53 if (invalidCharacters != null)
54 this.invalidCharacters = invalidCharacters.ToCharArray ();
57 public override bool CanValidate (Type type)
59 return type == typeof(string);
62 public override void Validate (object value)
64 if (value == null && minLength <= 0)
67 string s = (string) value;
68 if (s == null || s.Length < minLength)
69 throw new ArgumentException ("The string must be at least " + minLength + " characters long.");
70 if (s.Length > maxLength)
71 throw new ArgumentException ("The string must be no more than " + maxLength + " characters long.");
72 if (invalidCharacters != null) {
73 int i = s.IndexOfAny (invalidCharacters);
75 throw new ArgumentException (String.Format ("The string cannot contain any of the following characters: '{0}'.", invalidCharacters));