我一直在研究一个将上传的文件保存到网络共享的ASP.NET项目.我想我可以使用虚拟目录并且没问题,但我一直在努力获得Directory.CreateDirectory的权限.
我能够上传文件,所以我决定更改我的代码,将所有内容放在一个目录中,但这需要我使用File.Exists来避免重写.
现在我已经更新了所有代码,我发现无论我做什么,当我测试网络共享时,File.Exists总是返回false(文件肯定存在).
有任何想法吗？我正在通过网络共享走到尽头.
解决方法
我刚刚参与了一个非常类似的项目,我将文件保存到网络共享.这两台计算机位于同一子网上,但不受域控制器控制,因此每台计算机都拥有自己的用户.
我在两台计算机上创建了一个用户名和密码相同的用户.然后我创建了一个网络共享并设置文件夹/共享权限以允许用户进行读写.
然后我创建了以下类来管理模拟：
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Security.Permissions;
using System.Text;
namespace MyProject.Business.Web
{
public class SecurityManager
{
#region DLL Imports
[DllImport("advapi32.dll",SetLastError = true,CharSet = CharSet.Unicode)]
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 extern static bool CloseHandle(IntPtr handle);
[DllImport("advapi32.dll",CharSet = CharSet.Auto,SetLastError = true)]
public extern static bool DuplicateToken(IntPtr ExistingTokenHandle,int SECURITY_IMPERSONATION_LEVEL,ref IntPtr DuplicateTokenHandle);
#endregion
public string Domain { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
private WindowsImpersonationContext m_CurrentImpersonationContext;
[PermissionSetAttribute(SecurityAction.Demand,Name = "FullTrust")]
public void StartImpersonation()
{
const int logoN32_PROVIDER_DEFAULT = 0;
const int logoN32_logoN_INTERACTIVE = 2;
IntPtr tokenHandle = IntPtr.Zero;
IntPtr dupeTokenHandle = IntPtr.Zero;
// obtain a handle to an access token
bool waslogonSuccessful = logonUser(UserName,Domain,Password,logoN32_logoN_INTERACTIVE,logoN32_PROVIDER_DEFAULT,ref tokenHandle);
if (!waslogonSuccessful)
throw new Exception(String.Format("logon Failed with error number {0}",Marshal.GetLastWin32Error()));
// use the token handle to impersonate the user
WindowsIdentity newId = new WindowsIdentity(tokenHandle);
m_CurrentImpersonationContext = newId.Impersonate();
// free the tokens
if (tokenHandle != IntPtr.Zero)
CloseHandle(tokenHandle);
}
public void EndImpersonation()
{
m_CurrentImpersonationContext.Undo();
}
}
}
然后在ASP.NET页面中,我执行了以下操作：
SecurityManager sm = new SecurityManager(); sm.UserName = ConfigurationManager.AppSettings["UserFileShareUsername"]; sm.Password = ConfigurationManager.AppSettings["UserFileSharePassword"]; sm.StartImpersonation(); if (!Directory.Exists(folderPath)) Directory.CreateDirectory(folderPath); File.Move(sourcePath,destinationPath); sm.EndImpersonation();
