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

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Peter Bartok    (pbartok@novell.com)
  24 //
  25 //
  26
  27 using System.ComponentModel;
  28 using System.Security.Permissions;
  29
  30 namespace System.Web.UI.WebControls {
  31         // CAS
  32         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  33         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  34         // attributes
  35         [DefaultEvent("ServerValidate")]
  36 #if NET_2_0
  37         [ToolboxData("<{0}:CustomValidator runat=\"server\" ErrorMessage=\"CustomValidator\"></{0}:CustomValidator>")]
  38 #else
  39         [ToolboxData("<{0}:CustomValidator runat=server ErrorMessage=\"CustomValidator\"></{0}:CustomValidator>")]
  40 #endif
  41         public class CustomValidator : BaseValidator {
  42                 static readonly object serverValidateEvent = new object ();
  43
  44                 EventHandlerList events = new EventHandlerList ();
  45
  46                 #region Events
  47                 [WebSysDescription ("")]
  48                 [WebCategory ("Behavior")]
  49                         public event ServerValidateEventHandler ServerValidate {
  50                         add { events.AddHandler (serverValidateEvent, value); }
  51                         remove { events.RemoveHandler (serverValidateEvent, value); }
  52                 }
  53
  54                 #endregion      // Events
  55
  56                 #region Public Constructors
  57                 public CustomValidator() {
  58                 }
  59                 #endregion      // Public Constructors
  60
  61                 #region Public Instance Properties
  62                 [DefaultValue("")]
  63                 [WebSysDescription ("")]
  64                 [WebCategory ("Behavior")]
  65 #if NET_2_0
  66                 [Themeable (false)]
  67 #endif
  68                 public string ClientValidationFunction {
  69                         get { return ViewState.GetString("ClientValidationFunction", ""); }
  70                         set { ViewState["ClientValidationFunction"] = value; }
  71                 }
  72
  73 #if NET_2_0
  74                 [Themeable (false)]
  75                 [DefaultValue (false)]
  76                 public bool ValidateEmptyText {
  77                         get { return ViewState.GetBool ("ValidateEmptyText", false); }
  78                         set { ViewState ["ValidateEmptyText"] = value; }
  79                 }
  80 #endif
  81                 #endregion      // Public Instance Properties
  82
  83                 #region Public Instance Methods
  84                 protected override void AddAttributesToRender(HtmlTextWriter writer) {
  85                         base.AddAttributesToRender (writer);
  86
  87                         if (base.RenderUplevel) {
  88                                 string s;
  89
  90 #if NET_2_0
  91                                 RegisterExpandoAttribute (ClientID, "evaluationfunction", "CustomValidatorEvaluateIsValid");
  92                                 if (ValidateEmptyText)
  93                                         RegisterExpandoAttribute (ClientID, "validateemptytext", "true");
  94                                 s = ClientValidationFunction;
  95                                 if (!String.IsNullOrEmpty (s))
  96                                         RegisterExpandoAttribute (ClientID, "clientvalidationfunction", s, true);
  97 #else
  98                                 writer.AddAttribute ("evaluationfunction", "CustomValidatorEvaluateIsValid", false);
  99
 100                                 s = ClientValidationFunction;
 101                                 if (s != String.Empty)
 102                                         writer.AddAttribute("clientvalidationfunction", s);
 103 #endif
 104                         }
 105                 }
 106
 107                 protected override bool ControlPropertiesValid ()
 108                 {
 109                         if (ControlToValidate == "")
 110                                 return true;
 111                         return base.ControlPropertiesValid ();
 112                 }
 113
 114                 protected override bool EvaluateIsValid() {
 115                         if (ControlToValidate.Length > 0) {
 116                                 string value = GetControlValidationValue (ControlToValidate);
 117 #if NET_2_0
 118                                 if (String.IsNullOrEmpty (value) && !ValidateEmptyText)
 119                                         return true;
 120 #endif
 121                                 return OnServerValidate (value);
 122                         }
 123                         return OnServerValidate(string.Empty);
 124                 }
 125
 126                 protected virtual bool OnServerValidate(string value) {
 127                         ServerValidateEventHandler eh = events [serverValidateEvent] as ServerValidateEventHandler;
 128                         if (eh != null) {
 129                                 ServerValidateEventArgs e;
 130
 131                                 e = new ServerValidateEventArgs(value, true);
 132                                 eh (this, e);
 133                                 return e.IsValid;
 134                         }
 135                         return true;
 136                 }
 137                 #endregion      // Public Instance Methods
 138         }
 139 }