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1 using System;
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2 using System.Text.RegularExpressions;
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3
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4 namespace BLToolkit.Validation
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5 {
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6 [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]
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7 public class RegExAttribute : ValidatorBaseAttribute
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8 {
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9 public RegExAttribute(string pattern)
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10 : this(pattern, RegexOptions.IgnorePatternWhitespace
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11 #if !SILVERLIGHT
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12 | RegexOptions.Compiled
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13 #endif
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14 )
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15 {
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16 }
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17
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18 public RegExAttribute(string pattern, RegexOptions options)
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19 {
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20 _pattern = pattern;
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21 _options = options;
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22 }
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23
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24 public RegExAttribute(string pattern, string errorMessage)
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25 : this(pattern)
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26 {
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27 ErrorMessage = errorMessage;
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28 }
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29
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30 public RegExAttribute(string pattern, RegexOptions options, string errorMessage)
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31 :this(pattern, options)
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32 {
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33 ErrorMessage = errorMessage;
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34 }
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35
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36 [Obsolete("Use RegExAttribute.Pattern instead.")]
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37 public string Value { get { return Pattern; } }
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38
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39 private readonly string _pattern;
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40 public string Pattern { get { return _pattern; } }
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41
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42 private readonly RegexOptions _options;
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43 public RegexOptions Options { get { return _options; } }
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44
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45 #if !SILVERLIGHT
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46 [NonSerialized]
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47 #endif
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48 private Regex _validator;
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49 public Regex Validator
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50 {
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51 get
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52 {
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53 if (_validator == null)
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54 _validator = new Regex(_pattern, _options);
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55
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56 return _validator;
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57 }
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58 }
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59
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60 public override bool IsValid(ValidationContext context)
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61 {
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62 if (context.IsNull(context))
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63 return true;
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64
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65 Match match = Validator.Match(context.Value.ToString());
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66
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67 return match.Success && match.Value == context.Value.ToString();
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68 }
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69
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70 public override string ErrorMessage
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71 {
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72 get { return base.ErrorMessage ?? "'{0}' format is not valid."; }
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73 set { base.ErrorMessage = value; }
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74 }
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75 }
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76 }
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