mcs/class/System.Web/System.Web.UI.WebControls/RegularExpressionValidator.cs

   1 //
   2 // System.Web.UI.WebControls.RegularExpressionValidator
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@novell.com)
   6 //
   7 // (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.ComponentModel;
  30 using System.Web;
  31 using System.Web.UI.WebControls;
  32 using System.Text;
  33 using System.Text.RegularExpressions;
  34 using System.Security.Permissions;
  35
  36 namespace System.Web.UI.WebControls {
  37
  38         // CAS
  39         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  40         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  41         // attributes
  42 #if NET_2_0
  43         [ToolboxData ("<{0}:RegularExpressionValidator runat=\"server\" ErrorMessage=\"RegularExpressionValidator\"></{0}:RegularExpressionValidator>")]
  44 #else
  45         [ToolboxData ("<{0}:RegularExpressionValidator runat=server ErrorMessage=\"RegularExpressionValidator\"></{0}:RegularExpressionValidator>")]
  46 #endif
  47         public class RegularExpressionValidator : BaseValidator
  48         {
  49                 public RegularExpressionValidator ()
  50                 {
  51                 }
  52
  53                 protected override void AddAttributesToRender (HtmlTextWriter w)
  54                 {
  55                         if (RenderUplevel) {
  56 #if NET_2_0
  57                                 RegisterExpandoAttribute (ClientID, "evaluationfunction", "RegularExpressionValidatorEvaluateIsValid");
  58                                 if (ValidationExpression.Length > 0)
  59                                         RegisterExpandoAttribute (ClientID, "validationexpression", ValidationExpression, true);
  60 #else
  61                                 w.AddAttribute ("evaluationfunction", "RegularExpressionValidatorEvaluateIsValid", false);
  62                                 if (ValidationExpression != "")
  63                                         w.AddAttribute ("validationexpression", ValidationExpression);
  64 #endif
  65                         }
  66
  67                         base.AddAttributesToRender (w);
  68                 }
  69
  70                 protected override bool EvaluateIsValid ()
  71                 {
  72                         if (GetControlValidationValue (ControlToValidate).Trim() == "")
  73                                 return true;
  74
  75                         StringBuilder expr = new StringBuilder(ValidationExpression);
  76
  77                         if (expr.Length == 0 || expr [0] != '^')
  78                                 expr.Insert(0, '^');
  79
  80                         if (expr [expr.Length - 1] != '$')
  81                                 expr.Append('$');
  82
  83                         return Regex.IsMatch (GetControlValidationValue(ControlToValidate), expr.ToString ());
  84                 }
  85
  86 #if NET_2_0
  87                 [Themeable (false)]
  88 #else
  89                 [Bindable(true)]
  90 #endif
  91                 [DefaultValue ("")]
  92                 [Editor ("System.Web.UI.Design.WebControls.RegexTypeEditor, " + Consts.AssemblySystem_Design, typeof(System.Drawing.Design.UITypeEditor))]
  93                 [WebSysDescription ("")]
  94                 [WebCategory ("Behavior")]
  95                 public string ValidationExpression {
  96                         get {
  97                                 return ViewState.GetString ("ValidationExpression", "");
  98                         }
  99                         set {
 100                                 ViewState ["ValidationExpression"] = value;
 101                         }
 102                 }
 103         }
 104 }