如何按特定用户打开文件

Question

如何使用.Net打开特定用户的文件。
例子：

File.OpenFile(filePath, user) 

Answer 1

从this螺纹：

const string file = @"\\machine\test\file.txt"; 

     using (UserImpersonation2 user = new UserImpersonation2("user", "domain", "password")) 
     { 
      if (user.ImpersonateValidUser()) 
      { 
       StreamReader reader = new StreamReader(file); 
       Console.WriteLine(reader.ReadToEnd()); 
       reader.Close(); 
      } 
     } 


class UserImpersonation2:IDisposable 
{ 
    [DllImport("advapi32.dll")] 
    public static extern bool LogonUser(String lpszUserName, 
     String lpszDomain, 
     String lpszPassword, 
     int dwLogonType, 
     int dwLogonProvider, 
     ref IntPtr phToken); 

    [DllImport("kernel32.dll", CharSet = CharSet.Auto)] 
    public static extern bool CloseHandle(IntPtr handle); 

    WindowsImpersonationContext wic; 
    IntPtr tokenHandle; 
    string _userName; 
    string _domain; 
    string _passWord; 

    public UserImpersonation2(string userName, string domain, string passWord) 
    { 
     _userName = userName; 
     _domain = domain; 
     _passWord = passWord; 
    } 

    const int LOGON32_PROVIDER_DEFAULT = 0; 
    const int LOGON32_LOGON_INTERACTIVE = 2; 

    public bool ImpersonateValidUser() 
    { 
     bool returnValue = LogonUser(_userName, _domain, _passWord, 
       LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, 
       ref tokenHandle); 

     Console.WriteLine("LogonUser called."); 

     if (false == returnValue) 
     { 
      int ret = Marshal.GetLastWin32Error(); 
      Console.WriteLine("LogonUser failed with error code : {0}", ret); 
      return false; 
     } 

     Console.WriteLine("Did LogonUser Succeed? " + (returnValue ? "Yes" : "No")); 
     Console.WriteLine("Value of Windows NT token: " + tokenHandle); 

     // Check the identity. 
     Console.WriteLine("Before impersonation: " 
      + WindowsIdentity.GetCurrent().Name); 
     // Use the token handle returned by LogonUser. 
     WindowsIdentity newId = new WindowsIdentity(tokenHandle); 
     wic = newId.Impersonate(); 

     // Check the identity. 
     Console.WriteLine("After impersonation: " 
      + WindowsIdentity.GetCurrent().Name); 
     return true; 
    } 
    #region IDisposable Members 
    public void Dispose() 
    { 
     if(wic!=null) 
      wic.Undo(); 
     if (tokenHandle != IntPtr.Zero) 
      CloseHandle(tokenHandle); 

    } 
    #endregion 
}