ASP. NET generic handler receives file upload

public void ProcessRequest (HttpContext context) {context.            Response.ContentType = "Text/plain";            StringBuilder sb = new StringBuilder ();            string resultcode = null;            string errormsg = null;            string paths = "";            String names = "";            string title = "";            String fileguid = ""; if (context.                Request.Files.Count = = 0) {ResultCode = "1003"; ErrorMsg = "The upload file is empty!"                "; Sb.                Append ("{\" resultcode\ ":" + "\" "+ ResultCode +" \ "); Sb.                Append (","); Sb.                Append ("\" errormsg\ ":" + "\" "+ errormsg +" \ "); Sb.                Append (","); Sb.                Append ("\" Datas\ ":" + "{"); Sb.                Append ("\" filepath\ ":" + "\" "+ Paths +" \ "); Sb.                Append (","); Sb.                Append ("\" filename\ ":" + "\" "+ names +" \ "); Sb.                Append (","); Sb. Append ("\" filetitle\ ":" + "\" "+ title +" \ ");                Sb.                Append (","); Sb.                Append ("\" fileguid\ ":" + "\" "+ Fileguid +" \ "); Sb.                Append ("}"); Sb.            Append ("}"); } else {String guid = System.Guid.NewGuid ().                ToString ("N"); String dir = context.                Server.MapPath ("~/taskmobile/files/") + GUID; if (!                System.IO.Directory.Exists (dir)) {System.IO.Directory.CreateDirectory (dir); } for (int i = 0; I < context. Request.Files.Count; i++) {//Gets the object of the uploaded file httppostedfile img = context.                    Request.files[i]; Gets the name of the uploaded file string s = img.                    FileName; var strfileextension = s.substring (S.lastindexof ('. ') + 1, s.length-s.lastindexof ('. ')-1).                    ToUpper (); String allowextension = system.configuration.configurationmanager.appsettings["ALLOWUPLOADFIletype "]; if (allowextension. IndexOf (strfileextension) >= 0) {int len = S.lastindexof (".")-S.lastindexo                        F ("\ \")-1;                        String fileName = S.substring (s.lastindexof ("\ \") + 1, Len);                        String fullName = S.substring (s.lastindexof ("\ \") + 1);                        FileName = Filename.replace (",", "");                        FullName = Fullname.replace (",", "");                        FullName = Fullname.replace (":", ""); Intercept to get the name of the uploaded file (ie upload will also attach the absolute path, here only to get the name of the file)//string str = System.Guid.NewGuid (). ToString ("N") + s.substring (S.lastindexof (".")-1);                        S.substring (s.lastindexof ("\ \") + 1);                        String path = dir + "\ \" + FullName; Save file IMG.                        SaveAs (path);    paths = Httpruntime.appdomainappvirtualpath + "/taskmobile/files/" + GUID + "/" + fullName;                    title = "/taskmobile/files/" + GUID + "/" + fullName;                        names = FullName; Attachment capital (in kilobytes) int size = img.                        contentlength/1024; Save the attachment to the file table Fileguid = new Ndfiles (). AddFiles (Names, "", Strfileextension, Ndfiles.getfiletype (strfileextension), size. ToString (), paths, context.                        User.Identity.Name);                        ResultCode = "1000"; Sb.                        Append ("{\" resultcode\ ":" + "\" "+ ResultCode +" \ "); Sb.                        Append (","); Sb.                        Append ("\" errormsg\ ":" + "\" "+ errormsg +" \ "); Sb.                        Append (","); Sb.                        Append ("\" Datas\ ":" + "{"); Sb.                        Append ("\" filepath\ ":" + "\" "+ Paths +" \ "); Sb.                        Append (","); Sb.                        Append ("\" filename\ ":" + "\" "+ names +" \ "); Sb.                     Append (",");   Sb.                        Append ("\" filetitle\ ":" + "\" "+ title +" \ "); Sb.                        Append (","); Sb.                        Append ("\" fileguid\ ":" + "\" "+ Fileguid +" \ "); Sb.                        Append ("}"); Sb.                    Append ("}");                        } else {ResultCode = "1003";                        errormsg = "Unsupported File types:" + strfileextension; Sb.                        Append ("{\" resultcode\ ":" + "\" "+ ResultCode +" \ "); Sb.                        Append (","); Sb.                        Append ("\" errormsg\ ":" + "\" "+ errormsg +" \ "); Sb.                        Append (","); Sb.                        Append ("\" Datas\ ":" + "{"); Sb.                        Append ("\" filepath\ ":" + "\" "+ Paths +" \ "); Sb.                        Append (","); Sb.                        Append ("\" filename\ ":" + "\" "+ names +" \ "); Sb.                        Append (","); Sb. Append ("\" filetitle\ ":" + "\" "+ Title + "\""); Sb.                        Append (","); Sb.                        Append ("\" fileguid\ ":" + "\" "+ Fileguid +" \ "); Sb.                        Append ("}"); Sb.                    Append ("}"); } context. Response.Write (sb.)                ToString ()); }            }        }

　　

ASP. NET generic handler receives file upload