The use and analysis of the C# operation path (Path) class method

English translation:

As the name suggests, it is the operation path

Namespaces:

using System.IO;

Commonly used in this namespace are file streams... and so on are some classes and methods related to operating files

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This article explains and runs all the methods in it...

F12 go to definition found is a static class

What is a static class?
Static classes can create objects without new(Path p =new Path) and can be called directly through the class name (Path.GetFileName())

This is a static class... everything contained in a static class must be static methods

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The next step is to introduce the static method inside.

Path class method:

Because it is a class that operates on paths, the paths are all strings, so the return values ​​are basically of string type (string).

Get path filename:

 string str= Path.GetFileName(@"C:\生产队的驴.txt");
 Console.WriteLine(str);

operation result:

Donkey of the production team.txt

The method is to extract the file name in the path including the extension

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Absolute path:
that is, the full path

 string   path =Path.GetFullPath(@"C:\temp\生产队的驴.txt");       
 Console.WriteLine(path);

operation result:

C:\temp\The donkey of the production team.txt

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Get filename (without extension):

string str= Path.GetFileNameWithoutExtension(@"C:\生产队的驴.txt");
Console.WriteLine(str);

operation result:

production team donkey

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Get the file extension:

   string str= Path.GetExtension(@"C:\生产队的驴.txt");
            Console.WriteLine(str);

operation result:

.txt

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Get file path:

  string str= Path.GetDirectoryName(@"C:\temp\生产队的驴.txt");
  Console.WriteLine(str);

operation result:

C:\temp

The method contains the folder name but not the filename with extension

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Determine a folder or file:

  bool b = Path.HasExtension(@"C:\temp\");
 Console.WriteLine(b);

This method is to determine whether the path is a folder, if it is a folder, return the flase file (txt, mp4, mp3...) and return true

operation result:

flse

not the case of a folder

bool b = Path.HasExtension(@"C:\temp\生产队的驴.txt");
 Console.WriteLine(b);

operation result:

true

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Change the path extension:

  string str  = Path.ChangeExtension(@"C:\temp\生产队的驴.txt",".jpg");
            Console.WriteLine(str);

It should be noted that this method does not change the extension of the entity file, but only the extension of the current path.

Running result:

just change the string...the entity file does not change

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Merge path:

 string str  = Path.Combine(@"C:\temp\.生产队的驴.txt","测试");
            Console.WriteLine(str);

operation result:

C:\temp.production_team_ass.txt\test

This method is similar to the "+" of strings, that is, the concatenation of two strings is equivalent to

string s = @"\测试";
   string str = @"C:\temp\.生产队
  Console.WriteLine(str + s);

operation result:

C:\temp.production_team_ass.txt\test

It's all the same...

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Check if the paths are the same:

bool path =Path.ReferenceEquals(@"C:\temp\生产队的驴.txt", @"C:\temp\生产队的驴.txt");

What is returned is a boolean value if the same True is responsible for the False
running result:

True

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Is it the root directory:

   bool  path =Path.IsPathRooted(@"C:\temp\生产队的驴.txt");
  Console.WriteLine(path);

operation result:

True

Can be understood as whether it is a legal path

Incorrect is:

 bool  path =Path.IsPathRooted(@"temp\生产队的驴.txt");
            Console.WriteLine(path);

operation result:

False

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Current user temporary file path:

string  path =Path.GetTempPath();
            Console.WriteLine(path);

operation result:

C:\Users\Acer\AppData\Local\Temp\

This path stores files stored by other applications that do not contain important data and can be cleared... Software and system caches, temporary files are stored here

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Temporary file with zero bytes:

 string  path =Path.GetTempFileName();
            Console.WriteLine(path);

operation result:

C:\Users\Acer\AppData\Local\Temp\tmp1F56.tmp

Also a temp file...don't know what's the use...

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Randomly generate filename and extension:

string  path =Path.GetRandomFileName();
        Console.WriteLine(path);

operation result:

q1bhhhpm.f5s

This can be used for batch saving of files...such as pictures

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Get directory current disk:

 string  path =Path.GetPathRoot(@"D:\temp\生产队的驴.txt");
            Console.WriteLine(path);

operation result:

D:\

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Path illegal character set:
that is, characters that file names cannot contain, such as (< > "), etc.

  char[]  path =Path.GetInvalidPathChars();
          foreach(char i in path)
            Console.Write(i);

That is, the illegal characters are all in this array.

But I don't know why it is garbled...only a few are displayed...but I feel that this method is useless, a

total of 35

Illegal character set for file:

 char[]  path =Path.GetInvalidFileNameChars();
          foreach(char i in path)
            Console.WriteLine(i);

The same is also the feeling of garbled code, so I didn't study so, a

total of 40

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Pure hand play, give a thumbs up~