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

   1 //
   2 // System.Web.UI.WebControls.RangeValidator.cs
   3 //
   4 // Authors:
   5 //   Gaurav Vaish (gvaish@iitk.ac.in)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) Gaurav Vaish (2002)
   9 // (C) 2003 Andreas Nahr
  10 //
  11 \r
  12 using System;
  13 using System.ComponentModel;\r
  14 using System.Web;\r
  15 using System.Web.UI;\r
  16 using System.Xml;\r
  17 \r
  18 namespace System.Web.UI.WebControls\r
  19 {\r
  20         [ToolboxData("<{0}:RangeValidator runat=\"server\" "\r
  21                       + "ErrorMessage=\"RangeValidator\"></{0}:RangeValidator>")]\r
  22         public class RangeValidator : BaseCompareValidator\r
  23         {\r
  24                 public RangeValidator(): base()\r
  25                 {\r
  26                 }\r
  27
  28                 [DefaultValue (""), Bindable (true), WebCategory ("Behavior")]
  29                 [WebSysDescription ("The maximum value that the validated control can be assigned.")]\r
  30                 public string MaximumValue\r
  31                 {\r
  32                         get\r
  33                         {\r
  34                                 object o = ViewState["MaximumValue"];\r
  35                                 if(o != null)\r
  36                                 {\r
  37                                         return (string)o;\r
  38                                 }\r
  39                                 return String.Empty;\r
  40                         }\r
  41                         set\r
  42                         {\r
  43                                 ViewState["MaximumValue"] = value;\r
  44                         }\r
  45                 }\r
  46
  47                 [DefaultValue (""), Bindable (true), WebCategory ("Behavior")]
  48                 [WebSysDescription ("The minimum value that the validated control can be assigned.")]\r
  49                 public string MinimumValue\r
  50                 {\r
  51                         get\r
  52                         {\r
  53                                 object o = ViewState["MinimumValue"];\r
  54                                 if(o != null)\r
  55                                 {\r
  56                                         return (string)o;\r
  57                                 }\r
  58                                 return String.Empty;\r
  59                         }\r
  60                         set\r
  61                         {\r
  62                                 ViewState["MinimumValue"] = value;\r
  63                         }\r
  64                 }\r
  65 \r
  66                 protected override void AddAttributesToRender(HtmlTextWriter writer)\r
  67                 {\r
  68                         base.AddAttributesToRender(writer);\r
  69                         if(base.RenderUplevel)\r
  70                         {\r
  71                                 writer.AddAttribute("evaluationfunction", "RangeValidatorEvaluateIsValid");\r
  72                                 writer.AddAttribute("maximumvalue", MaximumValue);\r
  73                                 writer.AddAttribute("minimumvalue", MinimumValue);\r
  74                         }\r
  75                 }\r
  76 \r
  77                 protected override bool ControlPropertiesValid()\r
  78                 {\r
  79                         string max = MaximumValue;\r
  80                         if(!CanConvert(max, Type))\r
  81                         {\r
  82                                 string[] fmt = new string[4];\r
  83                                 fmt[0] = max;\r
  84                                 fmt[1] = "MaximumValue";\r
  85                                 fmt[2] = ID;\r
  86                                 fmt[3] = PropertyConverter.EnumToString(typeof(ValidationDataType), Type);\r
  87                                 throw new HttpException(HttpRuntime.FormatResourceString("Validator_value_bad_type", fmt));\r
  88                         }\r
  89                         string min = MinimumValue;\r
  90                         if(!CanConvert(min, Type))\r
  91                         {\r
  92                                 string[] fmt = new string[4];\r
  93                                 fmt[0] = min;\r
  94                                 fmt[1] = "MinimumValue";\r
  95                                 fmt[2] = ID;\r
  96                                 fmt[3] = PropertyConverter.EnumToString(typeof(ValidationDataType), Type);\r
  97                                 throw new HttpException(HttpRuntime.FormatResourceString("Validator_value_bad_type", fmt));\r
  98                         }\r
  99 \r
 100                         if(Compare(min,max,  ValidationCompareOperator.GreaterThan, Type))\r
 101                         {\r
 102                                 string[] fmt = new string[3];\r
 103                                 fmt[0] = min;\r
 104                                 fmt[1] = max;\r
 105                                 fmt[2] = PropertyConverter.EnumToString(typeof(ValidationDataType), Type);\r
 106                                 throw new HttpException(HttpRuntime.FormatResourceString("Validator_range_overalap", fmt));\r
 107                         }\r
 108                         return base.ControlPropertiesValid();\r
 109                 }\r
 110 \r
 111                 protected override bool EvaluateIsValid()\r
 112                 {\r
 113                         string ctrl = GetControlValidationValue(ControlToValidate);\r
 114                         if(ctrl == null || ctrl.Trim().Length == 0)\r
 115                         {\r
 116                                 return true;\r
 117                         }\r
 118                         bool retVal = Compare(ctrl, MinimumValue, ValidationCompareOperator.GreaterThanEqual,\r
 119                                              this.Type);\r
 120                         if(retVal)\r
 121                         {\r
 122                                 retVal = Compare(ctrl, MaximumValue, ValidationCompareOperator.LessThanEqual,\r
 123                                                  this.Type);\r
 124                         }\r
 125                         return retVal;\r
 126                 }\r
 127         }\r
 128 }\r