Server. mappath usage

Record the usage of server. mappath for future use:
Note: The paths obtained by server. mappath are physical paths on the server, that is, absolute paths.
1. server. mappath ("/")
Note: Obtain the location of the application root directory, such as c: \ Inetpub \ wwwroot \.
2. server. mappath ("./")
Note: Obtain the current directory of the page, which is equivalent to server. mappath ("").
3. server. mappath ("../")
Note: Obtain the parent directory of the page.
4. server. mappath ("~ /")
Note: Obtain the directory of the current application. If it is the root directory, it is the root directory. If it is a virtual directory, it is the location of the virtual directory, such as C: \ Inetpub \ wwwroot \ example \.