C # get Download path

Request.applicationpath Returns/or IIS under directory. If the personal site is a new directory under the IIS Web site AAA, return such as:/AAA

Request.Url.Authority return domain name and port or IP such as: localhost:1897

var applicationpath =request.applicationpath.length>1? Request.applicationpath: "";//Prevent more than one slash. When it is a website, return to/AAA. When the directory is under the site, return null characters

var path = "http://" +request.url.authority+applicationpath + "/upload/file. txt"; Final: http://localhost:1897/upload/files. txt or http://localhost:1897/aaa/upload/files. txt

C # get Download path