mcs/class/System.Web/System.Web.UI.HtmlControls/HtmlInputFile.cs

   1 //
   2 // System.Web.UI.HtmlControls.HtmlInputFile.cs
   3 //
   4 // Author:
   5 //      Dick Porter  <dick@ximian.com>
   6 //
   7 // Copyright (C) 2005 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.Collections.Specialized;
  30 using System.ComponentModel;
  31 using System.Security.Permissions;
  32
  33 namespace System.Web.UI.HtmlControls
  34 {
  35         // CAS
  36         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         // attributes
  39         [ValidationProperty ("Value")]
  40         public class HtmlInputFile : HtmlInputControl , IPostBackDataHandler
  41         {
  42                 public HtmlInputFile () : base ("file")
  43                 {
  44                 }
  45
  46                 [DefaultValue ("")]
  47                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  48                 [WebSysDescription("")]
  49                 public string Accept
  50                 {
  51                         get {
  52                                 string acc = Attributes["accept"];
  53
  54                                 if (acc == null) {
  55                                         return (String.Empty);
  56                                 }
  57
  58                                 return (acc);
  59                         }
  60                         set {
  61                                 if (value == null) {
  62                                         Attributes.Remove ("accept");
  63                                 } else {
  64                                         Attributes["accept"] = value;
  65                                 }
  66                         }
  67                 }
  68
  69                 [DefaultValue ("")]
  70                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  71                 [WebSysDescription("")]
  72                 public int MaxLength
  73                 {
  74                         get {
  75                                 string maxlen = Attributes["maxlength"];
  76
  77                                 if (maxlen == null) {
  78                                         return (-1);
  79                                 } else {
  80                                         return (Convert.ToInt32 (maxlen));
  81                                 }
  82                         }
  83                         set {
  84                                 if (value == -1) {
  85                                         Attributes.Remove ("maxlength");
  86                                 } else {
  87                                         Attributes["maxlength"] = value.ToString ();
  88                                 }
  89                         }
  90                 }
  91
  92                 HttpPostedFile posted_file;
  93
  94                 [DefaultValue ("")]
  95                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  96                 [WebSysDescription("")]
  97                 [WebCategory("Misc")]
  98                 public HttpPostedFile PostedFile
  99                 {
 100                         get {
 101                                 return (posted_file);
 102                         }
 103                 }
 104
 105 #if NET_2_0
 106                 [DefaultValue ("-1")]
 107 #else
 108                 [DefaultValue ("")]
 109 #endif
 110                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 111                 [WebSysDescription("")]
 112                 [WebCategory("Appearance")]
 113                 public int Size
 114                 {
 115                         get {
 116                                 string size = Attributes["size"];
 117
 118                                 if (size == null) {
 119                                         return (-1);
 120                                 } else {
 121                                         return (Convert.ToInt32 (size));
 122                                 }
 123                         }
 124                         set {
 125                                 if (value == -1) {
 126                                         Attributes.Remove ("size");
 127                                 } else {
 128                                         Attributes["size"] = value.ToString ();
 129                                 }
 130                         }
 131                 }
 132
 133                 [Browsable (false)]
 134                 public override string Value
 135                 {
 136                         get {
 137                                 HttpPostedFile file = PostedFile;
 138                                 if (file == null)
 139                                         return string.Empty;
 140
 141                                 return file.FileName;
 142                         }
 143                         set {
 144                                 throw new NotSupportedException ("The value property on HtmlInputFile is not settable.");
 145                         }
 146                 }
 147
 148 #if NET_2_0
 149                 protected internal
 150 #else
 151                 protected
 152 #endif
 153                 override void OnPreRender (EventArgs e)
 154                 {
 155                         base.OnPreRender (e);
 156
 157                         if (Page != null && !Disabled) {
 158                                 Page.RegisterRequiresPostBack (this);
 159 #if NET_2_0
 160                                 Page.RegisterEnabledControl (this);
 161 #endif
 162                         }
 163
 164                         HtmlForm form = (HtmlForm) SearchParentByType (typeof (HtmlForm));
 165                         if (form != null && form.Enctype == "")
 166                                 form.Enctype = "multipart/form-data";
 167                 }
 168
 169                 Control SearchParentByType (Type type)
 170                 {
 171                         Control ctrl = Parent;
 172                         while (ctrl != null) {
 173                                 if (type.IsAssignableFrom (ctrl.GetType ())) {
 174                                         return ctrl;
 175                                 }
 176                                 ctrl = ctrl.Parent;
 177                         }
 178
 179                         return null;
 180                 }
 181
 182                 bool LoadPostDataInternal (string postDataKey, NameValueCollection postCollection)
 183                 {
 184                         posted_file = Page.Request.Files [postDataKey];
 185
 186                         return (false);
 187                 }
 188
 189                 void RaisePostDataChangedEventInternal ()
 190                 {
 191                         /* No events to raise */
 192                 }
 193
 194 #if NET_2_0
 195                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 196                 {
 197                         return LoadPostDataInternal (postDataKey, postCollection);
 198                 }
 199
 200                 protected virtual void RaisePostDataChangedEvent ()
 201                 {
 202                         RaisePostDataChangedEventInternal ();
 203                 }
 204 #endif
 205
 206                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 207                 {
 208 #if NET_2_0
 209                         return LoadPostData (postDataKey, postCollection);
 210 #else
 211                         return LoadPostDataInternal (postDataKey, postCollection);
 212 #endif
 213                 }
 214
 215                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 216                 {
 217 #if NET_2_0
 218                         RaisePostDataChangedEvent ();
 219 #else
 220                         RaisePostDataChangedEventInternal ();
 221 #endif
 222                 }
 223         }
 224 }
 225
 226