如何获得当前域名?只要域名,不要别的.

Question

Response.Write(HttpContext.Current.Request.PhysicalApplicationPath+"<br>");
Response.Write(HttpContext.Current.Request.ApplicationPath+"<br>");
Response.Write(HttpContext.Current.Request.CurrentExecutionFilePath+"<br>");
Response.Write(HttpContext.Current.Request.FilePath+"<br>");
Response.Write(HttpContext.Current.Request.Path+"<br>");
Response.Write(HttpContext.Current.Request.PhysicalPath+"<br>");
Response.Write(HttpContext.Current.Request.RawUrl+"<br>");
Response.Write(HttpContext.Current.Request.Url+"<br>");
Response.Write(HttpContext.Current.Request.UserHostAddress+"<br>");
Response.Write(HttpContext.Current.Request.UserAgent+"<br>");
Response.Write(HttpContext.Current.Request.UrlReferrer+"<br>");
Response.Write(HttpContext.Current.Request.UserHostName+"<br>");
这些好像通通不行....