Get Base URL or a part of URL

asp_get_base_url.cs

//*************** Solution 1 **************/

// http://forums.asp.net/t/1466607.aspx/1
//http://forums.asp.net/t/1383898.aspx

//would return http://localhost:2013 or http://localhost:2013/ApplicationPath

return string.Format("{0}://{1}{2}",
                    HttpContext.Current.Request.Url.Scheme,
                    HttpContext.Current.Request.ServerVariables["HTTP_HOST"],
                    (HttpContext.Current.Request.ApplicationPath.Equals("/")) 
                      	? string.Empty : HttpContext.Current.Request.ApplicationPath
                    );                                    

//*************** Solution 2 **************/

string baseUrl = Request.Url.Scheme + "://" + Request.Url.Authority + 
    Request.ApplicationPath.TrimEnd('/') + "/";
 
//*************** Solution 3 **************/
Request.Url.GetLeftPart(UriPartial.Authority)

asp_getting_different_parts_url.cs

Response.Write("<br/> " + HttpContext.Current.Request.Url.Host);
Response.Write("<br/> " + HttpContext.Current.Request.Url.Authority);
Response.Write("<br/> " + HttpContext.Current.Request.Url.AbsolutePath);
Response.Write("<br/> " + HttpContext.Current.Request.ApplicationPath);
Response.Write("<br/> " + HttpContext.Current.Request.Url.Host);
Response.Write("<br/> " + HttpContext.Current.Request.Url.AbsoluteUri);
Response.Write("<br/> " + HttpContext.Current.Request.Url.PathAndQuery);

/*Sample Url http://localhost:60527/WebSite1test/Default2.aspx?QueryString1=1&QuerrString2=2*/

/************* Output
localhost
localhost:60527
/WebSite1test/Default2.aspx
/WebSite1test
localhost
http://localhost:60527/WebSite1test/Default2.aspx?QueryString1=1&QuerrString2=2
/WebSite1test/Default2.aspx?QueryString1=1&QuerrString2=2 


/