How to check if a file exists when it was no file extension? C#

Question

The file test has no extension and I need help to either move or rename this file to something with a extension

if(File.Exists(@"C:\\Users" + Environment.UserName + "\\Desktop\\test"))
{                                                                 /\
                                               this file has no file extension
}

Also, when using @"", you do not need to double-escape the backslashes. — LInsoDeTeh, Jun 19 '15 at 10:35
use System.IO.Path.Combine. There also is a recommended way of getting the Desktop directory: Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) — Andrei Tătar, Jun 19 '15 at 10:41

score 1 · Answer 1 · edited Jun 20 '20 at 09:12

I created a file named test with no extension in the folder M:\Incoming.

Running the following code works in both cases:

if (File.Exists(@"M:\Incoming\test"))
    Console.WriteLine("Exists");

if (File.Exists(@"M:\\Incoming\\test"))
    Console.WriteLine("Exists");

When using @ you do not need to specify two slashes, although it makes no difference anyway in this example.

Output:

Exists

Exists

Your problem is most likely to be in the way in which you are concatenating the strings.

Rahul Tripathi · Answer 2 · 2015-06-19T10:44:21.727

0

Try like this:

DirectoryInfo d = new DirectoryInfo("directory path");
FileInfo[] f = d.GetFiles("test.*");
if (f.Length > 0)
{
   File.Move(oldPath, newPath);
}
else
{
  //File does not exist
}

Also check Directory.GetFiles

edited Jun 19 '15 at 10:44

answered Jun 19 '15 at 10:35

Rahul Tripathi

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"Try like this" is not an answer. You also didn't try to understand OP's problem, you just answered the title. – CodeCaster Jun 19 '15 at 10:42

score -1 · Answer 3 · answered Jun 19 '15 at 10:36

-1

Use the directory info to get the list of files in directory, then for those files without extension, remove them.

answered Jun 19 '15 at 10:36

Jegan

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How to check if a file exists when it was no file extension? C#

3 Answers3