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

   1 //
   2 // System.Web.UI.WebControls.CustomValidator.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 //\r
  11 \r
  12 using System;\r
  13 using System.Web;\r
  14 using System.Web.UI;\r
  15 using System.ComponentModel;\r
  16 \r
  17 namespace System.Web.UI.WebControls\r
  18 {\r
  19         [DefaultEvent("ServerValidate")]\r
  20         [ToolboxData("<{0}:CustomValidator runat=\"server\""\r
  21                      + "ErrorMessage=\"CustomValidator\">"\r
  22                      + "</{0}:CustomValidator>")]\r
  23         public class CustomValidator : BaseValidator\r
  24         {\r
  25                 private static readonly object ServerValidateEvent = new object();\r
  26 \r
  27                 public CustomValidator()\r
  28                 {\r
  29                 }\r
  30
  31                 [DefaultValue (""), WebCategory ("Behavior")]
  32                 [WebSysDescription ("A client script that performs the validation.")]\r
  33                 public string ClientValidationFunction\r
  34                 {\r
  35                         get\r
  36                         {\r
  37                                 object o = ViewState["ClientValidationFunction"];\r
  38                                 if(o != null)\r
  39                                 {\r
  40                                         return (string)o;\r
  41                                 }\r
  42                                 return String.Empty;\r
  43                         }\r
  44                         set\r
  45                         {\r
  46                                 ViewState["ClientValidationFunction"] = value;\r
  47                         }\r
  48                 }\r
  49
  50                 [WebSysDescription ("Raised for validation on the server.")]\r
  51                 public event ServerValidateEventHandler ServerValidate\r
  52                 {\r
  53                         add\r
  54                         {\r
  55                                 Events.AddHandler(ServerValidateEvent, value);\r
  56                         }\r
  57                         remove\r
  58                         {\r
  59                                 Events.RemoveHandler(ServerValidateEvent, value);\r
  60                         }\r
  61                 }\r
  62 \r
  63                 protected override void AddAttributesToRender(HtmlTextWriter writer)\r
  64                 {\r
  65                         base.AddAttributesToRender(writer);\r
  66                         if(RenderUplevel)\r
  67                         {\r
  68                                 writer.AddAttribute("evaluationfunction", "CustomValidatorEvaluateIsValid");\r
  69                                 if(ClientValidationFunction.Length > 0)\r
  70                                 {\r
  71                                         writer.AddAttribute("clientvalidationfunction", ClientValidationFunction);\r
  72                                 }\r
  73                         }\r
  74                 }\r
  75 \r
  76                 protected override bool ControlPropertiesValid()\r
  77                 {\r
  78                         if(ControlToValidate.Length > 0)\r
  79                         {\r
  80                                 CheckControlValidationProperty(ControlToValidate, "ControlToValidate");\r
  81                         }\r
  82                         return true;\r
  83                 }\r
  84 \r
  85                 protected virtual bool OnServerValidate(string value)\r
  86                 {\r
  87                         if(Events != null)\r
  88                         {\r
  89                                 ServerValidateEventHandler sveh = (ServerValidateEventHandler)(Events[ServerValidateEvent]);\r
  90                                 if(sveh != null)\r
  91                                 {\r
  92                                         ServerValidateEventArgs args = new ServerValidateEventArgs(value, true);\r
  93                                         sveh(this, args);\r
  94                                         return args.IsValid;\r
  95                                 }\r
  96                         }\r
  97                         return true;\r
  98                 }\r
  99 \r
 100                 protected override bool EvaluateIsValid()\r
 101                 {\r
 102                         string ctrl = ControlToValidate;\r
 103                         if(ctrl.Length > 0)\r
 104                         {\r
 105                                 ctrl = GetControlValidationValue(ctrl);\r
 106                                 if(ctrl== null || ctrl.Length == 0)\r
 107                                 {\r
 108                                         return true;\r
 109                                 }\r
 110                         }\r
 111                         return OnServerValidate(ctrl);\r
 112                 }\r
 113         }\r
 114 }\r