一个刚刚开始学习编程的人，如果遇到问题无法解决可能会寻找别的解决方案，如果长此以往可能会放弃这门语言而学习其他的语言...
开源与分享的重要性
使用场景：将网站所有附件上传到指定服务器的共享目录下，首先在服务器上新建文件夹并共享
1. 新建类 FileHelper
namespace Frame.FileHelper
{
public class FileHelper
{
public static void CreateFolder(string path)
{
string dirPath = path.Substring(0, path.LastIndexOf("\"));
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}
}
}
public class FileConnect : IDisposable
{
#region win32 API
[DllImport("advapi32.dll", SetLastError = true)]
private static extern bool LogonUser(string lpszUsername,string lpszDomain,string lpszPassword,int dwLogonType,int dwLogonProvider,ref IntPtr phToken);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern 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);
// logon types
const int LOGON32_LOGON_INTERACTIVE = 2;
const int LOGON32_LOGON_NETWORK = 3;
const int LOGON32_LOGON_NEW_CREDENTIALS = 9;
// logon providers
const int LOGON32_PROVIDER_DEFAULT = 0;
const int LOGON32_PROVIDER_WINNT50 = 3;
const int LOGON32_PROVIDER_WINNT40 = 2;
const int LOGON32_PROVIDER_WINNT35 = 1;
WindowsIdentity newIdentity;
WindowsImpersonationContext impersonatedUser;
bool isSuccess = false;
IntPtr token = IntPtr.Zero;
public bool IsConnectted
{
get { return isSuccess; }
}
public FileConnect()
{
string fileServer = ConfigurationManager.AppSettings["FileServer"]; //远程服务器地址
if (!string.IsNullOrEmpty(fileServer))
{
isSuccess = Connect(fileServer, ConfigurationManager.AppSettings["FileServerUserName"], ConfigurationManager.AppSettings["FileServerPassword"]); //登录名 密码
}
else
{
isSuccess = true;
}
}
public bool Connect(string remoteAddr, string userName, string password)
{
bool isSuc = false;
try
{
isSuc = LogonUser(userName,remoteAddr, password, LOGON32_LOGON_NEW_CREDENTIALS, LOGON32_PROVIDER_DEFAULT, ref token);
newIdentity = new WindowsIdentity(token);
impersonatedUser = newIdentity.Impersonate();
}
catch (Exception )
{
return false;
}
return isSuc;
}
public void DisConnect()
{
if (isSuccess)
{
if (impersonatedUser != null)
impersonatedUser.Undo();
if (token != IntPtr.Zero)
CloseHandle(token);
}
}
public void Dispose()
{
DisConnect();
}
#endregion
}
}
---------------------------------------------
2.上传
public string uploadFileAndThumb(HttpContext context, string paramData, params object[] param)
{
using (FileConnect connect = new FileConnect())
{
string str_Result = "";
if (!connect.IsConnectted)
{
// throw new UException("");
str_Result = "{status:'fail',info:'文件服务器配置错误！'}";
return str_Result;
}
HttpPostedFile file = context.Request.Files["FileData"];
string extensionName = string.Empty;
string fileName = string.Empty;
if (file.FileName.LastIndexOf(".") > 0)
{
int len = file.FileName.LastIndexOf(".");
extensionName = file.FileName.Substring(len);
int lastIndex = file.FileName.LastIndexOf("\");
if (lastIndex>0)
{
int subLength = len - 1 - lastIndex;
fileName = file.FileName.Substring(lastIndex+1, subLength);
}
else
{
//chorme
fileName = file.FileName.Substring(0, file.FileName.LastIndexOf("."));
}
}
string date = DateTime.Now.ToString("yyyyMMdd");
string pID="";
string relativePath = string.Format(@"Project{0}{1}", pID, date);
string FileFolder = System.Configuration.ConfigurationManager.AppSettings["FilePath"]; // 类似 \10.2.183.21
string absoluteName = FileFolder + relativePath+ fileName+extensionName;
FileHelper.CreateFolder(absoluteName);
//判断文件大小
long length = file.ContentLength;
if (length > Convert.ToInt32(param[5]))
{
return "{ status:'100100',info:'' }";
}
else
{
file.SaveAs(absoluteName);
}
}
}
-------------------------------------------
3. 在需要下载附件 的页面 引用以下代码，登录远程服务器
//登录共享文件夹
using (FileConnect coneect = new FileConnect())
{
if (!coneect.IsConnectted)
{
// throw new UException("文件服务器配置错误");
}
}
--------------------------------------------