.NET(C#) 在网络上创建映射磁盘
（在服务器a上创建服务器b的共享磁盘并访问目录）
1、 在文件服务器上创建共享目录，并新建访问账户。比如共享目录为：\\192.168.0.9\share访问账户为：administrator 密码为：123.com
(C#只需创建公共类WNetHelper 调用即可)
2、 在WEB服务器上新建用户：administrator 密码为：123.com，用户组选择默认的administrator组即可。
3、 在WEB项目中新建公共类WNetHelper
public class WNetHelper
{
[DllImport("mpr.dll", EntryPoint = "WNetAddConnection2")]
private static extern uint WNetAddConnection2(NetResource lpNetResource, string lpPassword, string lpUsername, uint dwFlags);
[DllImport("Mpr.dll", EntryPoint = "WNetCancelConnection2")]
private static extern uint WNetCancelConnection2(string lpName, uint dwFlags, bool fForce);
[StructLayout(LayoutKind.Sequential)]
public class NetResource
{
public int dwScope;
public int dwType;
public int dwDisplayType;
public int dwUsage;
public string lpLocalName;
public string lpRemoteName;
public string lpComment;
public string lpProvider;
}
/// <summary>
/// 为网络共享做本地映射
/// </summary>
/// <param name="username">访问用户名（windows系统需要加计算机名，如：comp-1\user-1</param>
/// <param name="password">访问用户密码</param>
/// <param name="remoteName">网络共享路径（如：\\192.168.0.9\share）</param>
/// <param name="localName">本地映射盘符</param>
/// <returns></returns>
public static uint WNetAddConnection(string username, string password, string remoteName, string localName)
{
NetResource netResource = new NetResource();
netResource.dwScope = 2;
netResource.dwType = 1;
netResource.dwDisplayType = 3;
netResource.dwUsage = 1;
netResource.lpLocalName = localName;
netResource.lpRemoteName = remoteName.TrimEnd('\\');
uint result = WNetAddConnection2(netResource, password, username, 0);
return result;
}
public static uint WNetCancelConnection(string name, uint flags, bool force)
{
uint nret = WNetCancelConnection2(name, flags, force);
return nret;
}
}
}
4、 为IIS指定运行账户user-1
要实现此功能，有两种办法：
a) 在web.config文件中的<system.web>节点下，添加如下配置：<identity impersonate="true" userName="user-1" password="123456" />
b) 在WEB项目中添加公用类LogonImpersonate
public class LogonImpersonate : IDisposable
{
static public string DefaultDomain
{
get
{
return ".";
}
}
const int LOGON32_LOGON_INTERACTIVE = 2;
const int LOGON32_PROVIDER_DEFAULT = 0;
[System.Runtime.InteropServices.DllImport("Kernel32.dll")]
extern static int FormatMessage(int flag, ref IntPtr source, int msgid, int langid, ref string buf, int size, ref IntPtr args);
[System.Runtime.InteropServices.DllImport("Kernel32.dll")]
extern static bool CloseHandle(IntPtr handle);
[System.Runtime.InteropServices.DllImport("Advapi32.dll", SetLastError = true)]
extern static bool LogonUser(
string lpszUsername,
string lpszDomain,
string lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken
);
IntPtr token;
System.Security.Principal.WindowsImpersonationContext context;
public LogonImpersonate(string username, string password)
{
if (username.IndexOf("\\") == -1)
{
Init(username, password, DefaultDomain);
}
else
{
string[] pair = username.Split(new char[] { '\\' }, 2);
Init(pair[1], password, pair[0]);
}
}
public LogonImpersonate(string username, string password, string domain)
{
Init(username, password, domain);
}
void Init(string username, string password, string domain)
{
if (LogonUser(username, domain, password, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, ref token))
{
bool error = true;
try
{
context = System.Security.Principal.WindowsIdentity.Impersonate(token);
error = false;
}
finally
{
if (error)
CloseHandle(token);
}
}
else
{
int err = System.Runtime.InteropServices.Marshal.GetLastWin32Error();
IntPtr tempptr = IntPtr.Zero;
string msg = null;
FormatMessage(0x1300, ref tempptr, err, 0, ref msg, 255, ref tempptr);
throw (new Exception(msg));
}
}
~LogonImpersonate()
{
Dispose();
}
public void Dispose()
{
if (context != null)
{
try
{
context.Undo();
}
finally
{
CloseHandle(token);
context = null;
}
}
}
}
}
在访问映射磁盘之前首先调用此类为IIS更换运行用户：LogonImpersonate imper = new LogonImpersonate("administrator", "123.com");
5、 在访问共享目录前，调用WNetHelper.WNetAddConnection，添加磁盘映射
public static bool CreateDirectory(string path)
{
uint state = 0;
if (!Directory.Exists("Z:"))
{
state = WNetHelper.WNetAddConnection(@"administrator", "123.com", @"\\192.168.1.72\test$", "Z:");
}
if (state.Equals(0))
{
Directory.CreateDirectory(path);
return true;
}
else
{
throw new Exception("添加驱动器错误" + state.ToString());
}
}
6、完成。