由于服务程序授权与用户桌面授权互不影响，所以即使在用户桌面映射了NAS盘符，在Windows服务程序下仍然是不可以访问的。
一般来说有这样几种做法来访问NAS或共享盘：
1、加入域，通过“域用户认证”或“通过将NAS资源设置对某台计算机授权”来达到访问NAS的目的
2、不加域，在Windows中添加与NAS相同的用户名及密码，服务程序通过该用户名密码登录，可以访问NAS
3、不加域，通过调阅API的方式来获得访问NAS的权限
A、VC实现如下：
DWORD AcessNetDrtive(TCHAR* szRemotePath, TCHAR* szLocalDriver, const TCHAR* szUsername, const TCHAR* szPassword)
{
DWORD dwRetVal;
DWORD dwFlags;
NETRESOURCE nr;
memset(&nr, 0, sizeof(NETRESOURCE));
nr.dwScope = RESOURCE_GLOBALNET;
nr.dwType = RESOURCETYPE_ANY;
nr.lpLocalName = szLocalDriver;
nr.lpRemoteName = szRemotePath;
nr.lpProvider = NULL;
//CONNECT_REDIRECT;CONNECT_UPDATE_PROFILE;
dwFlags = 0;
dwRetVal = WNetAddConnection2(&nr, szPassword, szUsername, dwFlags);
retrun dwRetVal;
}
B、C#实现如下：
public class NetworkDrive
{
public enum ResourceScope
{
RESOURCE_CONNECTED = 1,
RESOURCE_GLOBALNET,
RESOURCE_REMEMBERED,
RESOURCE_RECENT,
RESOURCE_CONTEXT
}
public enum ResourceType
{
RESOURCETYPE_ANY,
RESOURCETYPE_DISK,
RESOURCETYPE_PRINT,
RESOURCETYPE_RESERVED
}
public enum ResourceUsage
{
RESOURCEUSAGE_CONNECTABLE = 0x00000001,
RESOURCEUSAGE_CONTAINER = 0x00000002,
RESOURCEUSAGE_NOLOCALDEVICE = 0x00000004,
RESOURCEUSAGE_SIBLING = 0x00000008,
RESOURCEUSAGE_ATTACHED = 0x00000010,
RESOURCEUSAGE_ALL = (RESOURCEUSAGE_CONNECTABLE | RESOURCEUSAGE_CONTAINER | RESOURCEUSAGE_ATTACHED),
}
public enum ResourceDisplayType
{
RESOURCEDISPLAYTYPE_GENERIC,
RESOURCEDISPLAYTYPE_DOMAIN,
RESOURCEDISPLAYTYPE_SERVER,
RESOURCEDISPLAYTYPE_SHARE,
RESOURCEDISPLAYTYPE_FILE,
RESOURCEDISPLAYTYPE_GROUP,
RESOURCEDISPLAYTYPE_NETWORK,
RESOURCEDISPLAYTYPE_ROOT,
RESOURCEDISPLAYTYPE_SHAREADMIN,
RESOURCEDISPLAYTYPE_DIRECTORY,
RESOURCEDISPLAYTYPE_TREE,
RESOURCEDISPLAYTYPE_NDSCONTAINER
}
[StructLayout(LayoutKind.Sequential)]
private class NETRESOURCE
{
public ResourceScope dwScope = 0;
public ResourceType dwType = 0;
public ResourceDisplayType dwDisplayType = 0;
public ResourceUsage dwUsage = 0;
public string lpLocalName = null;
public string lpRemoteName = null;
public string lpComment = null;
public string lpProvider = null;
}
[DllImport("mpr.dll")]
private static extern int WNetAddConnection2(NETRESOURCE lpNetResource, string lpPassword, string lpUsername, int dwFlags);
public static int MapNetworkDrive(string remotePath, string localDrive, string userName, string passWord)
{
NETRESOURCE myNetResource = new NETRESOURCE();
myNetResource.lpLocalName = localDrive;
myNetResource.lpRemoteName = remotePath;
myNetResource.lpProvider = null;
int result = WNetAddConnection2(myNetResource, passWord, userName, 0);
return result;
}
}