C# copy file to another directory using other domain/username/password

Question

In c# 2008, I'm trying to copy a file to a destination path (for example \newserver\destinationFolder), that can be in another domain or using a different username/password than the current user. How can I specify these new network credentials before doing the File.Copy(...) ?

Thank you!

possible duplicate of http://stackoverflow.com/questions/158492/c-network-login — Anders Abel, Apr 30 '10 at 13:59
Related or duplicate: [How to provide user name and password when connecting to a network share](https://stackoverflow.com/q/295538/3744182), [copy files with authentication in c#](https://stackoverflow.com/q/17786037/3744182), [Copying files over network (requiring authentication)](https://stackoverflow.com/q/2715625/3744182). — dbc, Mar 06 '21 at 22:31

score 2 · Accepted Answer · answered Apr 30 '10 at 13:56

Good question but I dont think this is possible. I believe this type of file copy from one domain to another ( where there is not a trust set up) would be considered security hole.

Some options:

Set up a trust between the domains and give rights to the current user
You could try a Shell execute command and see if you can make this work through command line parameters. I was thinking "Net use" command.

score 1 · Answer 2 · answered Apr 30 '10 at 13:57

1

Look at LogonUser. Here's the pinvoke page for it:

http://www.pinvoke.net/default.aspx/advapi32.logonuser

answered Apr 30 '10 at 13:57

Hans Olsson

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Vivek · Answer 3 · 2010-04-30T14:32:13.197

MapDrive => Copy files as local user => UnmapDrive. Take a look here:

    protected int MapDrive(){
        NETRESOURCEA[] resources = new NETRESOURCEA[1];
        resources[0] = new NETRESOURCEA();
        resources[0].dwType = 1;
        int dwFlags = 1;
        resources[0].lpLocalName = _DriveLetter;
        resources[0].lpRemoteName = _Path;
        resources[0].lpProvider = null; 
        int ret = WNetAddConnection2A(resources, null, null, dwFlags);
        return ret;
    }

    protected int UnmapDrive()
    {
        int ret = WNetCancelConnection2A(_DriveLetter, 0, true);
        return ret;
    }

C# copy file to another directory using other domain/username/password

3 Answers3