get file extension with file name only

Question

Hii

I have an application in asp.net with c#.

In this application different files(like .txt, .pdf, .jpg, .doc) are stored in one folder

Now i want to get extension from file name only

means if name of file is test.doc i want to get extension from asp.net page in which i have only name of file(ex test only, i dont have extension here)

Please help me

Thanks in advance
Rahul patel

Suthish Nair · Answer

Please accept the post as answer if your query is resolved. Thank You.

Sam Hobbs · Answer

Look at the FileInfo class.

Suthish Nair · Answer

check msdn link

Csharp patel · Answer

Hii string extention = Path.GetFullExtension(Server.MapPath(Request.ApplicationPath + @\Quatation\) + id); i have stored files with id in my folder that can be of any type like .txt or .doc or .jpg etc.. but from my page i can retrieve only id and i want to get extension or full name with extension from my folder means if the name of file stored in folder is 14.doc i have id(14) in my page. how can i get full name with extension or extension of file 14 from my page? thanks in advance

Suthish Nair · Answer

System.IO.Path.GetExtension(FileUpload1.PostedFile.FileName)