About C # getting the root directory overview

The following is summed up by other Bo friends, the red font for personal understanding of the label

1. Get the root directory method of the console application
Method 1, Environment.currentdirectory Gets or sets the fully qualified path of the current working directory
Method 2, AppDomain.CurrentDomain.BaseDirectory gets the base directory, which is used by the Assembly resolver to probe assemblies
2. Get the root directory method of the Web application
Method 1, HttpRuntime.AppDomainAppPath.ToString ();//Gets the physical drive path of the application directory that hosts the application in the current application domain. Used in App_Data to get
Method 2, Server.MapPath ("") or Server.MapPath ("~/");//returns the physical file path relative to the specified virtual path on the Web server
Method 3, request.applicationpath;//get the virtual application root directory of the ASP.
3. Get the root directory method of the WinForm application
1, Environment.CurrentDirectory.ToString ();//Gets or sets the fully qualified path to the current working directory
2, Application.StartupPath.ToString ();//Gets the path to the executable file that launched the application, not including the name of the executable file
3, Directory.GetCurrentDirectory ();//Gets the current working directory of the application
4. appdomain.currentdomain.basedirectory;//gets the base directory, which is used by the Assembly conflict Resolver to probe assemblies
5. appdomain.currentdomain.setupinformation.applicationbase;//Gets or sets the name of the directory that contains the application

1, 3 method when the program is opened as an external EXE by other program references, the obtained path is the current working directory of the referencing program

2, 4, 5 methods when the program is opened as an external EXE by other program references, the path obtained is the current working directory of the source program (where 2 methods are used because the interface requires System.Window.Forms reference, which is inconvenient when using the class library)
Where: The following two methods can get the name of the execution file
1, Process.getcurrentprocess (). mainmodule.filename;//gets the file name of the EXE that is currently executing.
2. application.executablepath;//gets the path to the executable file that launched the application, including the name of the executable file

Ways to get the root directory of. Net
Method 1:system.web.httpcontext.current.request.physicalapplicationpath
Method 2:system.web.httpcontext.current.server.mappath ("./")

Total Note: The path obtained by Server.MapPath is the physical path on the server, that is, the absolute path that is always said
1, Server.MapPath ("/")
Note: Obtain the location of the application root directory, such as C:\Inetpub\wwwroot\.
2, Server.MapPath ("./")
Note: Get the current directory on the page, equivalent to Server.MapPath ("").
3, Server.MapPath (".. /")
Note: Get the parent directory for your page.
4, Server.MapPath ("~/")
Note: Get the current application-level program directory, if it is the root directory, is the root directory, if it is a virtual directory, is the location of the virtual directory, such as C:\Inetpub\wwwroot\Example\.

About C # getting the root directory overview