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

   1 //
   2 // System.Web.UI.WebControls.FormParameter
   3 //
   4 // Authors:
   5 //      Ben Maurer (bmaurer@users.sourceforge.net)
   6 //
   7 // (C) 2003 Ben Maurer
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 #if NET_2_0
  32 using System.Collections;
  33 using System.Collections.Specialized;
  34 using System.Text;
  35
  36 namespace System.Web.UI.WebControls {
  37         public class FormParameter : Parameter {
  38
  39                 public FormParameter () : base ()
  40                 {
  41                 }
  42
  43                 protected FormParameter (FormParameter original) : base (original)
  44                 {
  45                         this.FormField = original.FormField;
  46                 }
  47
  48                 public FormParameter (string name, string formField) : base (name)
  49                 {
  50                         FormField = formField;
  51                 }
  52
  53                 public FormParameter (string name, TypeCode type, string formField) : base (name, type)
  54                 {
  55                         FormField = formField;
  56                 }
  57
  58                 protected override Parameter Clone ()
  59                 {
  60                         return new FormParameter (this);
  61                 }
  62
  63                 protected override object Evaluate (Control control)
  64                 {
  65                         if (control == null || control.Page == null || control.Page.Request == null)
  66                                 return null;
  67
  68                         return control.Page.Request.Form [FormField];
  69                 }
  70
  71                 public string FormField {
  72                         get {
  73                                 string s = ViewState ["FormField"] as string;
  74                                 if (s != null)
  75                                         return s;
  76
  77                                 return "";
  78                         }
  79                         set {
  80                                 if (FormField != value) {
  81                                         ViewState ["FormField"] = value;
  82                                         OnParameterChanged ();
  83                                 }
  84                         }
  85                 }
  86         }
  87 }
  88 #endif
  89