Как прочитать данные с сетевого диска либо по локальному пути MVC

Источник: en SO: How to provide user name and password when connecting to a network share

Попробуйте так, у меня работает

NetworkManager

public class NetworkManager : IDisposable
{
    private readonly string _networkName;
    public NetworkManager(string networkName)
    {
        _networkName = networkName;
        NetResource netResource = new NetResource
        {
            Scope = ResourceScope.GlobalNetwork,
            ResourceType = ResourceType.Any,
            DisplayType = ResourceDisplayType.Directory,
            RemoteName = networkName
        };
        int result = WNetAddConnection2(netResource, "ВАШ ПАРОЛЬ", "ВАШ ЛОГИН", 0);
        if (result != 0)
        {
            throw new Win32Exception(result);
        }
    }
    ~NetworkManager()
    {
        Dispose(false);
    }
    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }
    protected virtual void Dispose(bool disposing)
    {
        WNetCancelConnection2(_networkName, 0, true);
    }
    [DllImport("mpr.dll")]
    private static extern int WNetAddConnection2(NetResource netResource, string password, string username, int flags);
    [DllImport("mpr.dll")]
    private static extern int WNetCancelConnection2(string name, int flags, bool force);
}
[StructLayout(LayoutKind.Sequential)]
public class NetResource
{
    public ResourceScope Scope;
    public ResourceType ResourceType;
    public ResourceDisplayType DisplayType;
    public int Usage;
    public string LocalName;
    public string RemoteName;
    public string Comment;
    public string Provider;
}
public enum ResourceScope
{
    Connected = 1,
    GlobalNetwork,
    Remembered,
    Recent,
    Context
}
public enum ResourceType
{
    Any = 0,
    Disk = 1,
    Print = 2,
    Reserved = 8,
}
public enum ResourceDisplayType
{
    Generic = 0x0,
    Domain = 0x01,
    Server = 0x02,
    Share = 0x03,
    File = 0x04,
    Group = 0x05,
    Network = 0x06,
    Root = 0x07,
    Shareadmin = 0x08,
    Directory = 0x09,
    Tree = 0x0a,
    Ndscontainer = 0x0b
}

Использование

using (NetworkManager network = new NetworkManager(@"\\192.168.0.2"))
{
    // ваш код с подключением
}