我怎样才能得到文件的扩展名 [英] How Can I Get The Extension Of File

问题描述

如何获取文件的扩展名

解决方案

 FileInfo f =  new  FileInfo（  pathtofile.txt）; 
  string  ext = f.Extension;  //  返回txt  
 

 使用 System.IO; 
 
 ... 
 
  Dim  fileName  As  字符串 =   C：\ mydir.old \ myfile.ext 
  Dim  extension  As  字符串 
 
 extension = Path.GetExtension（fileName）

参见 Path.GetExtension Method [ ^ ]

how can i get the extension of file

解决方案

FileInfo f = new FileInfo("pathtofile.txt");
string ext = f.Extension; //returns txt

using System.IO;

...

Dim fileName As String = "C:\mydir.old\myfile.ext"
Dim extension As String

extension = Path.GetExtension(fileName)

See Path.GetExtension Method[^]

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