copy a file using UNC and impersonation

I want to use FileInfo and CopyTo to move some files across a network. I have to move the files to a share on a server that has to be accessed using a particular user account. How do I do this - do I have to impersonate that user and then do the copy?

I am using .net 4 and was wondering what the best way accomplish the impersonation is. I've read about using pInvoke and using advapi32.dll, but I was hoping someone could recommend a better way to do this.

Thanks for any thoughts.

EDIT Thanks for the replies. This is not a service, it is a console app, but it will be run from multiple machines. Is there any advantage to using a mapping over using impersonation, or vice-ve开发者_StackOverflowrsa? what is the recommended approach?

I have also considered using a batch file to create the mappings and do the copy, but I wasn't sure how easily it would be to accomplish because the folders to copy from will not always be the same - it will always be within one directory, but the subdirectory name changes.

You don't need impersonation all you have to do is to establish a file mapping using the credentials you want to use. You can accomplish this using either net use as a shell out command or WNetAddConnection2

If you are running as a service, you may need to impersonate. This is not the complete code but the gist of it:

     [DllImport("advapi32.dll", SetLastError = true)]
    private static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
    private static extern unsafe int FormatMessage(int dwFlags, ref IntPtr lpSource, int dwMessageId, int dwLanguageId, ref string lpBuffer, int nSize, IntPtr* arguments);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern bool CloseHandle(IntPtr handle);


IntPtr token = IntPtr.Zero;

            bool isSuccess = LogonUser(username, domain, password, impersonationType, Logon32ProviderDefault, ref token);
            if (!isSuccess)
            {
                RaiseLastError();
            }

            WindowsIdentity newIdentity = new WindowsIdentity(token);
            WindowsImpersonationContext impersonatedUser = newIdentity.Impersonate();

Save the token and then later

CloseHandle(token);