CheckFileExtension Server Action 

Parameters:

FileExtensionFormat (string): The expected file extension format, e.g., ".jpg", ".png", ".txt".

FileName (string): The name of the file to be checked, e.g., "namefile.jpg", "document.txt".

Function: Yes.

Output :

(Boolean) :

• true: If the file extension matches the expected format.
• false: If the file extension does not match the expected format.

GetFileExtension Server Action

Parameters:

FileName (string): The name of the file to be checked, e.g., "namefile.jpg", "document.txt".

Function : Yes.

Output:

(String) : File Extension e.g., ".jpg", ".txt".

Simple Tutorial

Create design like

In Client Action CheckFileExtension

FileExtensionFormat : give the extension you want to check

FileName : variable of FileName.

In Client Action GetFileExtension

FileName : variable of FileName.

Thanks.