Connect to network drive with user name and password

Question

How do I supply credential so that I can connect to a network drive in  NET   I   m trying to retrieve files from a network drive and need to supply user credentials to access the drive

User · Answer

I really don t know the hidden process  but I use a webrequest  this way I m able to pass the credentials  and it worked perfectly for me    var ftpDownloadFile   WebRequest Create  filePath    ftpDownloadFile Method   WebRequestMethods Ftp DownloadFile  ftpDownloadFile Credentials   new NetworkCredential  user    pass    using  var reader    FtpWebResponse ftpDownloadFile GetResponse    using  var responseStream   reader GetResponseStream          var writeStream   new FileStream Path Combine LocalStorage   FileMode Create       const int length   2048      var buffer   new Byte length       if  responseStream    null                var bytesRead   responseStream Read buffer  0  length           while  bytesRead  gt  0                        writeStream Write buffer  0  bytesRead               bytesRead   responseStream Read buffer  0  length                       reader Close        writeStream Close

User · Answer

Use this code for Impersonation its tested in MVC NET maybe for dot net core it required some change  If you want to dot net core let me know I will share   public static class ImpersonationAuthenticationNew                DllImport  quot advapi32 dll quot   SetLastError   true           private static extern bool LogonUser string usernamee  string domain  string password  LogonType dwLogonType  LogonProvider dwLogonProvider  ref IntPtr phToken            DllImport  quot kernel32 dll quot            private static extern bool CloseHandle IntPtr hObject           public static bool Login string domain string username  string password                                        IntPtr token   IntPtr Zero              var IsSuccess   LogonUser username  domain  password  LogonType LOGON32 LOGON NEW CREDENTIALS  LogonProvider LOGON32 PROVIDER WINNT50  ref token               if  IsSuccess                                using  WindowsImpersonationContext person   new WindowsIdentity token  Impersonate                                          var xIdentity   WindowsIdentity GetCurrent                         region Start ImpersonationContext  Scope                     try                                                   TYPE YOUR CODE HERE                                             catch  Exception ex    throw  ex                         finally                           person Undo                            CloseHandle token                           return true                                             endregion                                             return false                        region Enums     public enum LogonType                    lt summary gt              This logon type is intended for users who will be interactively using the computer  such as a user being logged on               by a terminal server  remote shell  or similar process              This logon type has the additional expense of caching logon information for disconnected operations              therefore  it is inappropriate for some client server applications              such as a mail server               lt  summary gt          LOGON32 LOGON INTERACTIVE   2                lt summary gt              This logon type is intended for high performance servers to authenticate plaintext passwords               The LogonUser function does not cache credentials for this logon type               lt  summary gt          LOGON32 LOGON NETWORK   3                lt summary gt              This logon type is intended for batch servers  where processes may be executing on behalf of a user without             their direct intervention  This type is also for higher performance servers that process many plaintext             authentication attempts at a time  such as mail or Web servers              The LogonUser function does not cache credentials for this logon type               lt  summary gt          LOGON32 LOGON BATCH   4                lt summary gt              Indicates a service-type logon  The account provided must have the service privilege enabled               lt  summary gt          LOGON32 LOGON SERVICE   5                lt summary gt              This logon type is for GINA DLLs that log on users who will be interactively using the computer              This logon type can generate a unique audit record that shows when the workstation was unlocked               lt  summary gt          LOGON32 LOGON UNLOCK   7                lt summary gt              This logon type preserves the name and password in the authentication package  which allows the server to make             connections to other network servers while impersonating the client  A server can accept plaintext credentials             from a client  call LogonUser  verify that the user can access the system across the network  and still             communicate with other servers              NOTE  Windows NT   This value is not supported               lt  summary gt          LOGON32 LOGON NETWORK CLEARTEXT   8                lt summary gt              This logon type allows the caller to clone its current token and specify new credentials for outbound connections              The new logon session has the same local identifier but uses different credentials for other network connections              NOTE  This logon type is supported only by the LOGON32 PROVIDER WINNT50 logon provider              NOTE  Windows NT   This value is not supported               lt  summary gt          LOGON32 LOGON NEW CREDENTIALS   9            public enum LogonProvider                    lt summary gt              Use the standard logon provider for the system              The default security provider is negotiate  unless you pass NULL for the domain name and the user name             is not in UPN format  In this case  the default provider is NTLM              NOTE  Windows 2000 NT    The default security provider is NTLM               lt  summary gt          LOGON32 PROVIDER DEFAULT   0          LOGON32 PROVIDER WINNT35   1          LOGON32 PROVIDER WINNT40   2          LOGON32 PROVIDER WINNT50   3            endregion

User · Answer

var fileName    Mylogs log   var local   Path Combine   C  TempLogs   fileName   var remote   Path Combine     servername c  Windows Temp    fileName    WebClient request   new WebClient    request Credentials   new NetworkCredential   username    password     if  File Exists local         File Delete local        File Copy remote  local  true     else       File Copy remote  local  true

User · Answer

Use this code for Impersonation its tested in MVC NET maybe for dot net core it required some change  If you want to dot net core let me know I will share   public static class ImpersonationAuthenticationNew                DllImport  quot advapi32 dll quot   SetLastError   true           private static extern bool LogonUser string usernamee  string domain  string password  LogonType dwLogonType  LogonProvider dwLogonProvider  ref IntPtr phToken            DllImport  quot kernel32 dll quot            private static extern bool CloseHandle IntPtr hObject           public static bool Login string domain string username  string password                                        IntPtr token   IntPtr Zero              var IsSuccess   LogonUser username  domain  password  LogonType LOGON32 LOGON NEW CREDENTIALS  LogonProvider LOGON32 PROVIDER WINNT50  ref token               if  IsSuccess                                using  WindowsImpersonationContext person   new WindowsIdentity token  Impersonate                                          var xIdentity   WindowsIdentity GetCurrent                         region Start ImpersonationContext  Scope                     try                                                   TYPE YOUR CODE HERE                        return true                                            catch  Exception ex    throw  ex                         finally                           person Undo                            CloseHandle token                                                                      endregion                                             return false                        region Enums     public enum LogonType                    lt summary gt              This logon type is intended for users who will be interactively using the computer  such as a user being logged on               by a terminal server  remote shell  or similar process              This logon type has the additional expense of caching logon information for disconnected operations              therefore  it is inappropriate for some client server applications              such as a mail server               lt  summary gt          LOGON32 LOGON INTERACTIVE   2                lt summary gt              This logon type is intended for high performance servers to authenticate plaintext passwords               The LogonUser function does not cache credentials for this logon type               lt  summary gt          LOGON32 LOGON NETWORK   3                lt summary gt              This logon type is intended for batch servers  where processes may be executing on behalf of a user without             their direct intervention  This type is also for higher performance servers that process many plaintext             authentication attempts at a time  such as mail or Web servers              The LogonUser function does not cache credentials for this logon type               lt  summary gt          LOGON32 LOGON BATCH   4                lt summary gt              Indicates a service-type logon  The account provided must have the service privilege enabled               lt  summary gt          LOGON32 LOGON SERVICE   5                lt summary gt              This logon type is for GINA DLLs that log on users who will be interactively using the computer              This logon type can generate a unique audit record that shows when the workstation was unlocked               lt  summary gt          LOGON32 LOGON UNLOCK   7                lt summary gt              This logon type preserves the name and password in the authentication package  which allows the server to make             connections to other network servers while impersonating the client  A server can accept plaintext credentials             from a client  call LogonUser  verify that the user can access the system across the network  and still             communicate with other servers              NOTE  Windows NT   This value is not supported               lt  summary gt          LOGON32 LOGON NETWORK CLEARTEXT   8                lt summary gt              This logon type allows the caller to clone its current token and specify new credentials for outbound connections              The new logon session has the same local identifier but uses different credentials for other network connections              NOTE  This logon type is supported only by the LOGON32 PROVIDER WINNT50 logon provider              NOTE  Windows NT   This value is not supported               lt  summary gt          LOGON32 LOGON NEW CREDENTIALS   9            public enum LogonProvider                    lt summary gt              Use the standard logon provider for the system              The default security provider is negotiate  unless you pass NULL for the domain name and the user name             is not in UPN format  In this case  the default provider is NTLM              NOTE  Windows 2000 NT    The default security provider is NTLM               lt  summary gt          LOGON32 PROVIDER DEFAULT   0          LOGON32 PROVIDER WINNT35   1          LOGON32 PROVIDER WINNT40   2          LOGON32 PROVIDER WINNT50   3            endregion

User · Answer

You can use the WindowsIdentity class  with a logon token  to impersonate while reading and writing files   var windowsIdentity   new WindowsIdentity logonToken   using  var impersonationContext   windowsIdentity Impersonate             Connect  read  write

User · Answer

You can use WebClient class to connect to the network driver using credentials  Include the below namespace   using System Net   WebClient request   new WebClient    request Credentials   new NetworkCredential  domain username    password    string   theFolders   Directory GetDirectories     computer share

User · Answer

Very elegant solution inspired from this one  This one uses only  Net library and does not need to use any command line or Win32 API   Code for ready reference   NetworkCredential theNetworkCredential   new NetworkCredential   domain username    password    CredentialCache theNetCache   new CredentialCache    theNetCache Add new Uri     computer     Basic   theNetworkCredential   string   theFolders   Directory GetDirectories     computer share

User · Answer

The best way to do this is to p invoke WNetUseConnection    StructLayout LayoutKind Sequential    private class NETRESOURCE            public int dwScope   0          public int dwType   0          public int dwDisplayType   0          public int dwUsage   0          public string lpLocalName               public string lpRemoteName               public string lpComment               public string lpProvider            DllImport  Mpr dll     private static extern int WNetUseConnection              IntPtr hwndOwner              NETRESOURCE lpNetResource              string lpPassword              string lpUserID              int dwFlags              string lpAccessName              string lpBufferSize              string lpResult              Example code here

User · Answer

you can use system diagnostocs process to call out to  net use      with userid and password  or to a command shell that takes those

[c#] Connect to network drive with user name and password

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