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

   1 //
   2 // System.Web.UI.WebControls.CompareValidator
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@novell.com)
   6 //
   7 // (C) 2005-2010 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.Globalization;
  30 using System.ComponentModel;
  31 using System.Security.Permissions;
  32
  33 namespace System.Web.UI.WebControls
  34 {
  35         // CAS
  36         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         // attributes
  39         [ToolboxData("<{0}:CompareValidator runat=\"server\" ErrorMessage=\"CompareValidator\"></{0}:CompareValidator>")]
  40         public class CompareValidator : BaseCompareValidator
  41         {
  42                 public CompareValidator ()
  43                 {
  44                 }
  45
  46                 protected override void AddAttributesToRender (HtmlTextWriter w)
  47                 {
  48                         if (RenderUplevel) {
  49                                 RegisterExpandoAttribute (ClientID, "evaluationfunction", "CompareValidatorEvaluateIsValid");
  50                                 if (ControlToCompare.Length > 0)
  51                                         RegisterExpandoAttribute (ClientID, "controltocompare", GetControlRenderID (ControlToCompare));
  52                                 if (ValueToCompare.Length > 0)
  53                                         RegisterExpandoAttribute (ClientID, "valuetocompare", ValueToCompare, true);
  54                                 RegisterExpandoAttribute (ClientID, "operator", Operator.ToString ());
  55                         }
  56
  57                         base.AddAttributesToRender (w);
  58                 }
  59
  60                 protected override bool ControlPropertiesValid ()
  61                 {
  62                         if ((this.Operator != ValidationCompareOperator.DataTypeCheck) && ControlToCompare.Length == 0 &&
  63                             !BaseCompareValidator.CanConvert (this.ValueToCompare, this.Type, this.CultureInvariantValues)) {
  64                                 throw new HttpException(
  65                                         String.Format("Unable to convert the value: {0} as a {1}", ValueToCompare,
  66                                                       Enum.GetName(typeof(ValidationDataType), this.Type)));
  67                         }
  68
  69                         if (ControlToCompare.Length > 0) {
  70                                 if (string.CompareOrdinal (ControlToCompare, ControlToValidate) == 0)
  71                                         throw new HttpException (String.Format ("Control '{0}' cannot have the same value '{1}' for both ControlToValidate and ControlToCompare.", ID, ControlToCompare));
  72                                 CheckControlValidationProperty (ControlToCompare, String.Empty);
  73                         }
  74
  75                         return base.ControlPropertiesValid ();
  76                 }
  77
  78                 protected override bool EvaluateIsValid ()
  79                 {
  80                         string control_value;
  81
  82                         control_value = GetControlValidationValue (this.ControlToValidate);
  83                         if (control_value == null)
  84                                 return true;
  85                         control_value = control_value.Trim ();
  86                         if (control_value.Length == 0)
  87                                 return true;
  88
  89                         string compare;
  90                         /* ControlToCompare takes precendence, if it's set. */
  91                         string controlToCompare = ControlToCompare;
  92                         compare = (!String.IsNullOrEmpty (controlToCompare) ? GetControlValidationValue (controlToCompare) : ValueToCompare);
  93
  94                         return BaseCompareValidator.Compare (GetControlValidationValue (ControlToValidate), false,
  95                                                              compare, this.CultureInvariantValues,
  96                                                              Operator, this.Type);
  97                 }
  98
  99                 [DefaultValue("")]
 100                 [TypeConverter(typeof(System.Web.UI.WebControls.ValidatedControlConverter))]
 101                 [WebSysDescription ("")]
 102                 [WebCategory ("Behavior")]
 103                 [Themeable (false)]
 104                 public string ControlToCompare {
 105                         get { return ViewState.GetString ("ControlToCompare", String.Empty); }
 106                         set { ViewState["ControlToCompare"] = value; }
 107                 }
 108
 109                 [DefaultValue(ValidationCompareOperator.Equal)]
 110                 [WebSysDescription ("")]
 111                 [WebCategory ("Behavior")]
 112                 [Themeable (false)]
 113                 public ValidationCompareOperator Operator {
 114                         get { return (ValidationCompareOperator)ViewState.GetInt ("Operator", (int)ValidationCompareOperator.Equal); }
 115                         set { ViewState ["Operator"] = (int)value; }
 116                 }
 117
 118                 [DefaultValue("")]
 119                 [WebSysDescription ("")]
 120                 [WebCategory ("Behavior")]
 121                 [Themeable (false)]
 122                 public string ValueToCompare {
 123                         get { return ViewState.GetString ("ValueToCompare", String.Empty); }
 124                         set { ViewState ["ValueToCompare"] = value; }
 125                 }
 126         }
 127 }