How to detect a USB drive has been plugged in

Question

I want to build a program that detects if a usb  or two or more  are plugged in   and copy all contents to any folder on a hard disk    Any ideas  I have this    using System Runtime InteropServices    But it is not the easy way  that I believe   I want something easy     I have another idea  if  folder exist  then copy  something -- but there may be a problem with that  and I want a good solution    There may also be a tool called SerialPort  can I use it   If so  how do I use it

User · Accepted Answer

It is easy to check for removable devices. However, there's no guarantee that it is a USB device:

var drives = DriveInfo.GetDrives()
    .Where(drive => drive.IsReady && drive.DriveType == DriveType.Removable);

This will return a list of all removable devices that are currently accessible. More information:

The DriveInfo class (msdn documentation)
The DriveType enumeration (msdn documentation)

User · Answer

Microsoft API Code Pack  ShellObjectWatcher class

User · Answer

Here is a code that works for me  which is a part from the website above combined with my early trials  http   www codeproject com KB system DriveDetector aspx  This basically makes your form listen to windows messages  filters for usb drives and  cd-dvds   grabs the lparam structure of the message and extracts the drive letter   protected override void WndProc ref Message m                 if  m Msg    WM DEVICECHANGE                        DEV BROADCAST VOLUME vol    DEV BROADCAST VOLUME Marshal PtrToStructure m LParam  typeof DEV BROADCAST VOLUME                if   m WParam ToInt32      DBT DEVICEARRIVAL   amp  amp    vol dbcv devicetype    DBT DEVTYPVOLUME                                  MessageBox Show DriveMaskToLetter vol dbcv unitmask  ToString                               if   m WParam ToInt32      DBT DEVICEREMOVALCOMPLETE   amp  amp   vol dbcv devicetype    DBT DEVTYPVOLUME                                 MessageBox Show  usb out                                    base WndProc ref m               StructLayout LayoutKind Sequential     Same layout in mem     public struct DEV BROADCAST VOLUME               public int dbcv size          public int dbcv devicetype          public int dbcv reserved          public int dbcv unitmask             private static char DriveMaskToLetter int mask                char letter          string drives    ABCDEFGHIJKLMNOPQRSTUVWXYZ     1   A  2   B  3   C         int cnt   0          int pom   mask   2          while  pom    0        while there is any bit set in the mask shift it right                                       pom   pom   2              cnt                      if  cnt  lt  drives Length              letter   drives cnt           else             letter                return letter          Do not forget to add this   using System Runtime InteropServices    and the following constants       const int WM DEVICECHANGE   0x0219    see msdn site     const int DBT DEVICEARRIVAL   0x8000      const int DBT DEVICEREMOVALCOMPLETE   0x8004      const int DBT DEVTYPVOLUME   0x00000002

[c#] How to detect a USB drive has been plugged in?

Examples related to c#

Examples related to file

Examples related to usb-drive