mcs/class/System.Web/System.Web.UI.WebControls/RangeValidator.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.Globalization;
  29 using System.Security.Permissions;
  30 using System.Web.Util;
  31
  32 // Modeled after Nikhil Kothari's sample in "ASP Server Controls and Components", pp368
  33
  34 namespace System.Web.UI.WebControls {
  35
  36         // CAS
  37         [AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         [AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  39         // attributes
  40         [ToolboxData("<{0}:RangeValidator runat=\"server\" ErrorMessage=\"RangeValidator\"></{0}:RangeValidator>")]
  41         public class RangeValidator : BaseCompareValidator {
  42                 #region Public Constructors
  43                 public RangeValidator() {
  44                 }
  45                 #endregion      // Public Constructors
  46
  47                 #region Public Instance Properties
  48                 [Themeable (false)]
  49                 [DefaultValue("")]
  50                 [WebSysDescription ("")]
  51                 [WebCategory ("Behavior")]
  52                 public string MaximumValue {
  53                         get {
  54                                 return ViewState.GetString("MaximumValue", String.Empty);
  55                         }
  56
  57                         set {
  58                                 ViewState["MaximumValue"] = value;
  59                         }
  60                 }
  61
  62                 [Themeable (false)]
  63                 [DefaultValue("")]
  64                 [WebSysDescription ("")]
  65                 [WebCategory ("Behavior")]
  66                 public string MinimumValue {
  67                         get {
  68                                 return ViewState.GetString("MinimumValue", String.Empty);
  69                         }
  70
  71                         set {
  72                                 ViewState["MinimumValue"] = value;
  73                         }
  74                 }
  75                 #endregion      // Public Instance Properties
  76
  77                 #region Public Instance Methods
  78                 protected override void AddAttributesToRender(HtmlTextWriter writer) {
  79                         base.AddAttributesToRender (writer);
  80
  81                         if (RenderUplevel) {
  82                                 RegisterExpandoAttribute (ClientID, "evaluationfunction", "RangeValidatorEvaluateIsValid");
  83                                 RegisterExpandoAttribute (ClientID, "minimumvalue", MinimumValue, true);
  84                                 RegisterExpandoAttribute (ClientID, "maximumvalue", MaximumValue, true);
  85                         }
  86                 }
  87
  88                 protected override bool ControlPropertiesValid() {
  89                         if (!CanConvert(MinimumValue, this.Type)) {
  90                                 throw new HttpException("Minimum value cannot be converterd to type " + this.Type.ToString());
  91                         }
  92                         if (!CanConvert(MaximumValue, this.Type)) {
  93                                 throw new HttpException("Maximum value cannot be converterd to type " + this.Type.ToString());
  94                         }
  95                         if (this.Type != ValidationDataType.String) {
  96                                 if (Compare(MinimumValue, MaximumValue, ValidationCompareOperator.GreaterThan, this.Type)) {
  97                                         throw new HttpException("Maximum value must be equal or bigger than Minimum value");
  98                                 }
  99                         }
 100                         return base.ControlPropertiesValid ();
 101                 }
 102
 103                 protected override bool EvaluateIsValid() {
 104                         string  control_value;
 105
 106                         control_value = GetControlValidationValue(this.ControlToValidate);
 107                         if (control_value == null)
 108                                 return true;
 109                         control_value = control_value.Trim();
 110                         if (control_value.Length == 0)
 111                                 return true;
 112
 113                         if (Compare(control_value, MinimumValue, ValidationCompareOperator.GreaterThanEqual, this.Type)) {
 114                                 if (Compare(control_value, MaximumValue, ValidationCompareOperator.LessThanEqual, this.Type)) {
 115                                         return true;
 116                                 }
 117                         }
 118                         return false;
 119                 }
 120                 #endregion      // Public Instance Methods
 121         }
 122 }