Detailed description of paths in ASP. NET

ASP. NETPath)Comparison table of obtaining methods and formats

Suppose our website is http: // localhost: 1897/news/press/content. aspx? Id = 1019

AndBrowser requestURL-related attributes and Methods	Output) Instance	BackupNote
Request. applicationpath	/	Indicates the current applicationProgram) Directory
Request. physicalpath	D: \ projects \ solution \ WEB \ news \ press \ content. aspx	Disk Drive code: \ parent directory \ subdirectory \ content. aspx
Request. physicalapplicationpath	D: \ projects \ solution \ WEB \	Disk Drive code: \ parent directory \ subdirectory \
Request. currentexecutionfilepath	/News/press/content. aspx
Request. filepath	/News/press/content. aspx	Corresponds to the virtual directory of IIS.
Request. Path	/News/press/content. aspx	The Virtual Path of the current request. PATH is the concatenation of filepath and pathinfo. * (See the following for details)
Server. mappath (string URL)	For example, if your application is in C:/IIS/mysite, then C:/IIS/mysite/1/index.html	Map a URL to a physical path on the server
Request. rawurl	/News/press/content. aspx? Id = 1019
Request. url. absolutepath	/News/press/content. aspx
Request. url. absoluteuri	Http: // localhost: 1897/content. aspx? Id = 1019
Request. url. localpath	/News/press // content. aspx
Request. url. pathandquery	/News/press // content. aspx? Id = 1019 & UU = 77
Request. url. Scheme	HTTP
Request. url. Host	Localhost
Request. url. Port	1987
Request. url. Authority	Localhost: 1897
Request. url. Query	? Id = 1019
Request. url. Query [ID]	1019
Request. url. Fragments	/ News/ Press/ Content. aspx
Request. url. segments [0]	/
System. Io. Path. getdirectoryname (request. physicalpath)	D: \ projects \ solution \ WEB \ news \ Press	Disk Drive code :\Parent directory \Subdirectory \
System. Io. Path. getfilename (request. physicalpath)	Content. aspx

 

(Link *) request. filepath, request. pathinfo, request. Path, requestrawurl

 

If the request address is http://www.cnblogs.com/default.aspx/booksthen

Request. filepath value: http://www.cnblogs.com/default.aspx

The request. pathinfo value is/books.

The request. PATH value is http://www.cnblogs.com/default.aspx/books

Request. rawurl value is http://www.cnblogs.com/default.aspx/books

If the request address is http://www.cnblogs.com/defaut.aspx? Id = 1 & name = kk

Request. filepath value: http://www.cnblogs.com/default.aspx

Request. pathinfo value: "" (Null String)

The request. PATH value is http://www.cnblogs.com/default.aspx

The request. rawurl value is http://www.cnblogs.com/default.aspx? Id = 1 & name = kk

 

 

2 request. servervariablesInformation obtained from the collection:

 
The left column is the server variable name, the right column is the value, and the value is obtained through request. servervariables [server variable name ].
Appl_md_path:/lm/w3svc/894523/root
Appl_physical_path: D: \ vssworkfolder \ briish_school_mis \ SRC \ website \
Instance_meta_path:/lm/w3svc/894523
Local_addr: 192.168.1.6
Path_info:/sysoption/billingsetup1.aspx
Path_translated: D: \ vssworkfolder \ briish_school_mis \ SRC \ website \ sysoption \ billingsetup1.aspx
Remote_addr: 192.168.1.6
Remote_host: 192.168.1.6
Script_name:/sysoption/billingsetup1.aspx
SERVER_NAME: 192.168.1.6
URL:/sysoption/billingsetup1.aspx

Request. servervariables is a powerful tool that can help us get a lot of client and web host information. If you are interested, you can use the followingCodeSee what information it actually contains.

Foreach (string s in request. servervariables)
{
Response. Write (S + ":" + request. servervariables [s] + "<br/> ");
}

3.PathConversion

 
1. convert to the server path (server. mappath)
An interesting question about Web server development and design is address translation. For example, HTTP address/images/a.txt. If you want to read the file through Io on the server side, you must have the local address of the file (such as C: \ windows \ system32 \ xx. DLL) ", then server. mappath is useful.
Response. Write (request. mappath (request. Path); output: D: \ vssworkfolder \ briish_school_mis \ SRC \ website \ sysoption \ billingsetup1.aspx
2. Convert to HTTP address (page. resolveclienturl page. resolveurl)
Response. Write (page. resolveclienturl ("~ /A/a.jpg "). The output is ../A/a.jpg.
Response. Write (page. resolveurl ("~ /A/a.jpg "). The output is/A/a.jpg.

 

In addition, when we use the upload control to upload a file, we use httppostedfile. For example:

Httppostedfile file = context. Request. Files [I]; // The context. Request. files here is a collection of uploaded files.

PS: httphandler is used here. You can use other methods to upload multiple files on the page.

How can I save the file?

Use the saveas method of httppostedfile, for example, file. saveas (specifiedpath );

The specifiedpath here is the absolute path of the uploaded file.

How to obtain the path of the uploaded file. we can use the path class. to operate the file. the httppostedfile class also contains the basic information of the file. such as file name, size, and path. path class operations are more complete. then you can use server. mappath () method for conversion.

 

To test the above theory, you can write a piece of code to clearly understand it. Example:

Stringbuilder Req = new stringbuilder ();

Req. append ("<Table cellpadding = 3 cellspacing = 0 border = 1> ");

 

// Request. applicationpath

Req. append ("<tr> <TD> ");

Req. append ("request. applicationpath ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. applicationpath + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. physicalpath

Req. append ("<tr> <TD> ");

Req. append ("request. physicalpath ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. physicalpath + "</B> ");

Req. append ("</TD> </tr> ");

 

// System. Io. Path. getdirectoryname (request. physicalpath)

Req. append ("<tr> <TD> ");

Req. append ("system. Io. Path. getdirectoryname (request. physicalpath )");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + system. Io. Path. getdirectoryname (request. physicalpath) + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. physicalapplicationpath

Req. append ("<tr> <TD> ");

Req. append ("request. physicalapplicationpath ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. physicalapplicationpath + "</B> ");

Req. append ("</TD> </tr> ");

 

// System. Io. Path. getfilename (request. physicalpath)

Req. append ("<tr> <TD> ");

Req. append ("system. Io. Path. getfilename (request. physicalpath )");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + system. Io. Path. getfilename (request. physicalpath) + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. currentexecutionfilepath

Req. append ("<tr> <TD> ");

Req. append ("request. currentexecutionfilepath ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. currentexecutionfilepath + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. filepath

Req. append ("<tr> <TD> ");

Req. append ("request. filepath ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. filepath + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. Path

Req. append ("<tr> <TD> ");

Req. append ("request. Path ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. Path + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. rawurl

Req. append ("<tr> <TD> ");

Req. append ("request. rawurl ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. rawurl + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. absolutepath

Req. append ("<tr> <TD> ");

Req. append ("request. url. absolutepath ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. absolutepath + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. absoluteuri

Req. append ("<tr> <TD> ");

Req. append ("request. url. absoluteuri ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. absoluteuri + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. Scheme

Req. append ("<tr> <TD> ");

Req. append ("request. url. Scheme ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. scheme + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. Host

Req. append ("<tr> <TD> ");

Req. append ("request. url. Host ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. Host + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. Port

Req. append ("<tr> <TD> ");

Req. append ("request. url. Port ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. Port + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. Authority

Req. append ("<tr> <TD> ");

Req. append ("request. url. Authority ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. Authority + "</B> ");

Req. append ("</TD> </tr> ");

 

// Local request. url. localpath

Req. append ("<tr> <TD> ");

Req. append ("request. url. localpath ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. localpath + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. pathinfo

Req. append ("<tr> <TD> ");

Req. append ("request. pathinfo ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. pathinfo + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. pathandquery

Req. append ("<tr> <TD> ");

Req. append ("request. url. pathandquery ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. pathandquery + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. Query

Req. append ("<tr> <TD> ");

Req. append ("request. url. Query ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. query + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. Fragment

// In principle, you should not be able to obtain any data from request. url. fragment, because the browser usually does not send # TOC.

Req. append ("<tr> <TD> ");

Req. append ("request. url. Fragment ");

Req. append ("</TD> <TD> ");

Req. append ("<B>" + request. url. Fragment + "</B> ");

Req. append ("</TD> </tr> ");

 

// Request. url. segments

Req. append ("<tr> ");

Req. append ("<TD> ");

Req. append ("request. url. segments ");

Req. append ("</TD> ");

Req. append ("<TD> ");

String [] segments = request. url. segments;

Foreach (string s in segments)

{

Req. append ("<B>" + S + "</B> ");

Req. append ("<p> ");

}

Req. append ("</TD> ");

Req. append ("</tr> ");

Req. append ("</table> ");

Response. Write (req. tostring ());

ReferenceArticle:
Http://blog.miniasp.com/post/2008/02/10/How-Do-I-Get-Paths-and-URL-fragments-from-the-HttpRequest-object.aspx

Http://www.cnblogs.com/zyip/archive/2009/08/13/1544968.html

If any error occurs, please do not renew it.

 

Add another instance:

// builds an absolute URL
Private Static string buildabsolute (string relativeuri)
{< br> // get current URI
URI uri = httpcontext. current. request. URL;
// build absolute path
string APP = httpcontext. current. request. applicationpath;
If (! App. endswith ("/") app + = "/";
relativeuri = relativeuri. trimstart ('/');
// return the absolute path
return httputility. urlpathencode (
string. format ("http: // {0 }:{ 1} {2} {3}",
Uri. host, Uri. port, app, relativeuri);
}