C# 获取路径中文件名、目录、扩展名等

string path = "C:\dir1\dir2\foo.txt";  

string str = "GetFullPath：" + Path.GetFullPath(path) + "
";  
str += "GetDirectoryName：" + Path.GetDirectoryName(path) + "
"; 
str += "GetFileName：" + Path.GetFileName(path) + "
";  
str += "GetFileNameWithoutExtension：" + Path.GetFileNameWithoutExtension(path) + "
";  
str += "GetExtension：" + Path.GetExtension(path) + "
"; 
str += "GetPathRoot：" + Path.GetPathRoot(path) + "
"; 

MessageBox.Show(str); 
结果：  
GetFullPath：C:dir1dir2foo.txt 
GetDirectoryName：C:dir1dir2 
GetFileName：foo.txt  
GetFileNameWithoutExtension：foo
GetExtension：.txt 
GetPathRoot：C: