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

   1 //
   2 // (C) 2005 Mainsoft Corporation (http://www.mainsoft.com)
   3 //
   4 // Authors:
   5 //      Andrew Skiba <andrews@mainsoft.com>
   6 //
   7 // Permission is hereby granted, free of charge, to any person obtaining
   8 // a copy of this software and associated documentation files (the
   9 // "Software"), to deal in the Software without restriction, including
  10 // without limitation the rights to use, copy, modify, merge, publish,
  11 // distribute, sublicense, and/or sell copies of the Software, and to
  12 // permit persons to whom the Software is furnished to do so, subject to
  13 // the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be
  16 // included in all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 //
  26 #if NET_2_0
  27
  28 using System;
  29 using System.ComponentModel;
  30 using System.Web;
  31 using System.Web.UI;
  32 using System.Web.UI.HtmlControls;
  33 using System.Security.Permissions;
  34 using System.IO;
  35
  36 namespace System.Web.UI.WebControls
  37 {
  38         [ControlValueProperty ("FileBytes")]
  39         [ValidationProperty ("FileName")]
  40         [Designer ("DesignerBaseTypeNameSystem.ComponentModel.Design.IDesignerDesignerTypeNameSystem.Web.UI.Design.WebControls.PreviewControlDesigner, " + Consts.AssemblySystem_Design)]
  41         [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal, Unrestricted=false)]
  42         [AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal, Unrestricted=false)]
  43         public class FileUpload : WebControl
  44         {
  45                 public FileUpload ()
  46                         : base (HtmlTextWriterTag.Input)
  47                 {
  48                 }
  49
  50                 byte[] cachedBytes;
  51                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  52                 [Bindable (true, BindingDirection.OneWay)]
  53                 [Browsable (false)]
  54                 public byte[] FileBytes {
  55                         get {
  56                                 if (cachedBytes == null) {
  57                                         cachedBytes = new byte[FileContent.Length];
  58                                         FileContent.Read (cachedBytes, 0, cachedBytes.Length);
  59                                 }
  60                                 return (byte [])(cachedBytes.Clone ());
  61                         }
  62                 }
  63
  64                 [Browsable(false)]
  65                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  66                 public Stream FileContent {
  67                         get {
  68                                 if (PostedFile == null)
  69                                         return Stream.Null;
  70                                 else
  71                                         return PostedFile.InputStream;
  72                         }
  73                 }
  74
  75                 [Browsable (false)]
  76                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  77                 public string FileName {
  78                         get {
  79                                 if (PostedFile == null)
  80                                         return string.Empty;
  81                                 else
  82                                         return PostedFile.FileName;
  83                         }
  84                 }
  85
  86                 [Browsable (false)]
  87                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  88                 public bool HasFile {
  89                         get { return PostedFile != null; }
  90                 }
  91
  92                 [Browsable (false)]
  93                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  94                 public HttpPostedFile PostedFile {
  95                         get {
  96                                 if (Page == null || !Page.IsPostBack)
  97                                         return null;
  98                                 if (Context == null || Context.Request == null)
  99                                         return null;
 100                                 return Context.Request.Files[UniqueID];
 101                         }
 102                 }
 103
 104                 protected override void AddAttributesToRender (HtmlTextWriter writer)
 105                 {
 106                         writer.AddAttribute (HtmlTextWriterAttribute.Type, "file");
 107                         if (!string.IsNullOrEmpty (UniqueID))
 108                                 writer.AddAttribute (HtmlTextWriterAttribute.Name, UniqueID);
 109                         base.AddAttributesToRender (writer);
 110                 }
 111
 112                 protected internal override void OnPreRender (System.EventArgs e)
 113                 {
 114                         base.OnPreRender (e);
 115                         Page.Form.Enctype = "multipart/form-data";
 116                 }
 117
 118                 protected internal override void Render (HtmlTextWriter writer)
 119                 {
 120                         if (Page != null)
 121                                 Page.VerifyRenderingInServerForm (this);
 122                         base.Render (writer);
 123                 }
 124
 125                 public void SaveAs (string filename)
 126                 {
 127                         HttpPostedFile file = PostedFile;
 128                         if (file != null)
 129                                 file.SaveAs (filename);
 130                 }
 131         }
 132 }
 133 #endif