bool SetAssociation(string Extension, string KeyName, string OpenWith, string FileDescription)
{
RegistryKey BaseKey;
RegistryKey OpenMethod;
RegistryKey Shell;
RegistryKey CurrentUser;
try
{
BaseKey = Registry.ClassesRoot.CreateSubKey(Extension);
BaseKey.SetValue("", KeyName);
BaseKey.Flush();
BaseKey.Close();
OpenMethod = Registry.ClassesRoot.CreateSubKey(KeyName);
OpenMethod.SetValue("", FileDescription);
OpenMethod.CreateSubKey("DefaultIcon").SetValue("", "\"" + OpenWith + "\",0");
OpenMethod.Flush();
Shell = OpenMethod.CreateSubKey("Shell");
Shell.CreateSubKey("open").CreateSubKey("command").SetValue("", "\"" + OpenWith + "\"" + " \"%1\"");
Shell.CreateSubKey("edit").CreateSubKey("command").SetValue("", "\"" + OpenWith + "\"" + " \"%1\"");
Shell.Flush();
Shell.Close();
OpenMethod.Close();
// Delete the key instead of trying to change it
CurrentUser = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\" + Extension, true);
if (CurrentUser != null)
{
CurrentUser.DeleteSubKey("UserChoice", false);
CurrentUser.Flush();
CurrentUser.Close();
}
}
catch (Exception ex)
{
if (ex is System.Security.SecurityException || ex is UnauthorizedAccessException)
{
MessageBox.Show("Please restart this program with administrative privileges to set file associations!");
return(false);
}
#if DEBUG
MessageBox.Show(ex.ToString());
#else
MessageBox.Show(ex.Message);
#endif
return(false);
}
// Tell explorer the file association has been changed
SHChangeNotify(0x08000000, 0x0000, IntPtr.Zero, IntPtr.Zero);
return(true);
}
