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) 2005-2010 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                 HttpPostedFile posted_file;
  43
  44                 public HtmlInputFile () : base ("file")
  45                 {
  46                 }
  47
  48                 [DefaultValue ("")]
  49                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  50                 [WebSysDescription("")]
  51                 public string Accept {
  52                         get {
  53                                 string acc = Attributes["accept"];
  54
  55                                 if (acc == null) {
  56                                         return (String.Empty);
  57                                 }
  58
  59                                 return (acc);
  60                         }
  61                         set {
  62                                 if (value == null) {
  63                                         Attributes.Remove ("accept");
  64                                 } else {
  65                                         Attributes["accept"] = value;
  66                                 }
  67                         }
  68                 }
  69
  70                 [DefaultValue ("")]
  71                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  72                 [WebSysDescription("")]
  73                 public int MaxLength {
  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                 [DefaultValue ("")]
  93                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  94                 [WebSysDescription("")]
  95                 [WebCategory("Misc")]
  96                 public HttpPostedFile PostedFile {
  97                         get {
  98                                 return (posted_file);
  99                         }
 100                 }
 101
 102                 [DefaultValue ("-1")]
 103                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 104                 [WebSysDescription("")]
 105                 [WebCategory("Appearance")]
 106                 public int Size {
 107                         get {
 108                                 string size = Attributes["size"];
 109
 110                                 if (size == null) {
 111                                         return (-1);
 112                                 } else {
 113                                         return (Convert.ToInt32 (size));
 114                                 }
 115                         }
 116                         set {
 117                                 if (value == -1) {
 118                                         Attributes.Remove ("size");
 119                                 } else {
 120                                         Attributes["size"] = value.ToString ();
 121                                 }
 122                         }
 123                 }
 124
 125                 [Browsable (false)]
 126                 public override string Value {
 127                         get {
 128                                 HttpPostedFile file = PostedFile;
 129                                 if (file == null)
 130                                         return string.Empty;
 131
 132                                 return file.FileName;
 133                         }
 134                         set {
 135                                 throw new NotSupportedException ("The value property on HtmlInputFile is not settable.");
 136                         }
 137                 }
 138
 139                 protected internal override void OnPreRender (EventArgs e)
 140                 {
 141                         base.OnPreRender (e);
 142
 143                         Page page = Page;
 144                         if (page != null && !Disabled) {
 145                                 page.RegisterRequiresPostBack (this);
 146                                 page.RegisterEnabledControl (this);
 147                         }
 148
 149                         HtmlForm form = (HtmlForm) SearchParentByType (typeof (HtmlForm));
 150                         if (form != null && form.Enctype == String.Empty)
 151                                 form.Enctype = "multipart/form-data";
 152                 }
 153
 154                 Control SearchParentByType (Type type)
 155                 {
 156                         Control ctrl = Parent;
 157                         while (ctrl != null) {
 158                                 if (type.IsAssignableFrom (ctrl.GetType ())) {
 159                                         return ctrl;
 160                                 }
 161                                 ctrl = ctrl.Parent;
 162                         }
 163
 164                         return null;
 165                 }
 166
 167                 bool LoadPostDataInternal (string postDataKey, NameValueCollection postCollection)
 168                 {
 169                         Page page = Page;
 170                         if (page != null)
 171                                 posted_file = page.Request.Files [postDataKey];
 172
 173                         return (false);
 174                 }
 175
 176                 void RaisePostDataChangedEventInternal ()
 177                 {
 178                         /* No events to raise */
 179                 }
 180
 181                 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
 182                 {
 183                         return LoadPostDataInternal (postDataKey, postCollection);
 184                 }
 185
 186                 protected virtual void RaisePostDataChangedEvent ()
 187                 {
 188                         RaisePostDataChangedEventInternal ();
 189                 }
 190
 191                 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
 192                 {
 193                         return LoadPostData (postDataKey, postCollection);
 194                 }
 195
 196                 void IPostBackDataHandler.RaisePostDataChangedEvent ()
 197                 {
 198                         RaisePostDataChangedEvent ();
 199                 }
 200         }
 201 }
 202
 203