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

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