C#訪問網絡共享文件夾，帶用戶名密碼域，解決電腦重啓後訪問不到網絡文件夾

問題：winform訪問網絡共享文件夾，電腦重啓後訪問不到指定目錄

原因：訪問網絡共享文件夾目錄需要相關的用戶憑據，文件資源管理器可以記住憑據，但是電腦重啓後直接用軟件訪問網絡文件夾路徑是沒有憑據的，就會出現訪問不到的問題。

解決：訪問時攜帶用戶名，密碼，域，等信息

使用：

using (SharedTool tool = new SharedTool("用戶名", "密碼", "域"))
{
    string filepath=@"192.168.0.31\data";//共享文件夾路徑
}

SharedTool類

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace 工單打印
{
    public class SharedTool : IDisposable
    {
        // obtains user token       
        [DllImport("advapi32.dll", SetLastError = true)]
        static extern bool LogonUser(string pszUsername, string pszDomain, string pszPassword,
            int dwLogonType, int dwLogonProvider, ref IntPtr phToken);

        // closes open handes returned by LogonUser       
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        extern static bool CloseHandle(IntPtr handle);

        [DllImport("Advapi32.DLL")]
        static extern bool ImpersonateLoggedOnUser(IntPtr hToken);

        [DllImport("Advapi32.DLL")]
        static extern bool RevertToSelf();
        const int LOGON32_PROVIDER_DEFAULT = 0;
        const int LOGON32_LOGON_NEWCREDENTIALS = 9;//域控中的需要用:Interactive = 2       
        private bool disposed;

        public SharedTool(string username, string password, string ip)
        {
            // initialize tokens       
            IntPtr pExistingTokenHandle = new IntPtr(0);
            IntPtr pDuplicateTokenHandle = new IntPtr(0);

            try
            {
                // get handle to token       
                bool bImpersonated = LogonUser(username, ip, password,
                    LOGON32_LOGON_NEWCREDENTIALS, LOGON32_PROVIDER_DEFAULT, ref pExistingTokenHandle);

                if (bImpersonated)
                {
                    if (!ImpersonateLoggedOnUser(pExistingTokenHandle))
                    {
                        int nErrorCode = Marshal.GetLastWin32Error();
                        throw new Exception("ImpersonateLoggedOnUser error;Code=" + nErrorCode);
                    }
                }
                else
                {
                    int nErrorCode = Marshal.GetLastWin32Error();
                    throw new Exception("LogonUser error;Code=" + nErrorCode);
                }
            }
            finally
            {
                // close handle(s)       
                if (pExistingTokenHandle != IntPtr.Zero)
                    CloseHandle(pExistingTokenHandle);
                if (pDuplicateTokenHandle != IntPtr.Zero)
                    CloseHandle(pDuplicateTokenHandle);
            }
        }

        protected virtual void Dispose(bool disposing)
        {
            if (!disposed)
            {
                RevertToSelf();
                disposed = true;
            }
        }

        public void Dispose()
        {
            Dispose(true);
        }
    }
}