本文实例为大家分享了C#访问网络共享文件夹的具体代码，供大家参考，具体内容如下

using System.Runtime.InteropServices; 
 
public enum ERROR_ID 
 { 
  ERROR_SUCCESS = 0, // Success 
  ERROR_BUSY = 170, 
  ERROR_MORE_DATA = 234, 
  ERROR_NO_BROWSER_SERVERS_FOUND = 6118, 
  ERROR_INVALID_LEVEL = 124, 
  ERROR_ACCESS_DENIED = 5, 
  ERROR_INVALID_PASSWORD = 86, 
  ERROR_INVALID_PARAMETER = 87, 
  ERROR_BAD_DEV_TYPE = 66, 
  ERROR_NOT_ENOUGH_MEMORY = 8, 
  ERROR_NETWORK_BUSY = 54, 
  ERROR_BAD_NETPATH = 53, 
  ERROR_NO_NETWORK = 1222, 
  ERROR_INVALID_HANDLE_STATE = 1609, 
  ERROR_EXTENDED_ERROR = 1208, 
  ERROR_DEVICE_ALREADY_REMEMBERED = 1202, 
  ERROR_NO_NET_OR_BAD_PATH = 1203 
 } 
 
 public enum RESOURCE_SCOPE 
 { 
  RESOURCE_CONNECTED = 1, 
  RESOURCE_GLOBALNET = 2, 
  RESOURCE_REMEMBERED = 3, 
  RESOURCE_RECENT = 4, 
  RESOURCE_CONTEXT = 5 
 } 
 
 public enum RESOURCE_TYPE 
 { 
  RESOURCETYPE_ANY = 0, 
  RESOURCETYPE_DISK = 1, 
  RESOURCETYPE_PRINT = 2, 
  RESOURCETYPE_RESERVED = 8, 
 } 
 
 public enum RESOURCE_USAGE 
 { 
  RESOURCEUSAGE_CONNECTABLE = 1, 
  RESOURCEUSAGE_CONTAINER = 2, 
  RESOURCEUSAGE_NOLOCALDEVICE = 4, 
  RESOURCEUSAGE_SIBLING = 8, 
  RESOURCEUSAGE_ATTACHED = 16, 
  RESOURCEUSAGE_ALL = (RESOURCEUSAGE_CONNECTABLE | RESOURCEUSAGE_CONTAINER | RESOURCEUSAGE_ATTACHED), 
 } 
 
 public enum RESOURCE_DISPLAYTYPE 
 { 
  RESOURCEDISPLAYTYPE_GENERIC = 0, 
  RESOURCEDISPLAYTYPE_DOMAIN = 1, 
  RESOURCEDISPLAYTYPE_SERVER = 2, 
  RESOURCEDISPLAYTYPE_SHARE = 3, 
  RESOURCEDISPLAYTYPE_FILE = 4, 
  RESOURCEDISPLAYTYPE_GROUP = 5, 
  RESOURCEDISPLAYTYPE_NETWORK = 6, 
  RESOURCEDISPLAYTYPE_ROOT = 7, 
  RESOURCEDISPLAYTYPE_SHAREADMIN = 8, 
  RESOURCEDISPLAYTYPE_DIRECTORY = 9, 
  RESOURCEDISPLAYTYPE_TREE = 10, 
  RESOURCEDISPLAYTYPE_NDSCONTAINER = 11 
 } 
 
 [StructLayout(LayoutKind.Sequential)] 
 public struct NETRESOURCE 
 { 
  public RESOURCE_SCOPE dwScope; 
  public RESOURCE_TYPE dwType; 
  public RESOURCE_DISPLAYTYPE dwDisplayType; 
  public RESOURCE_USAGE dwUsage; 
 
  [MarshalAs(UnmanagedType.LPStr)] 
  public string lpLocalName; 
 
  [MarshalAs(UnmanagedType.LPStr)] 
  public string lpRemoteName; 
 
  [MarshalAs(UnmanagedType.LPStr)] 
  public string lpComment; 
 
  [MarshalAs(UnmanagedType.LPStr)] 
  public string lpProvider; 
 } 
 
 public class NetworkConnection 
 { 
 
  [DllImport("mpr.dll")] 
  public static extern int WNetAddConnection2A(NETRESOURCE[] lpNetResource, string lpPassword, string lpUserName, int dwFlags); 
 
  [DllImport("mpr.dll")] 
  public static extern int WNetCancelConnection2A(string sharename, int dwFlags, int fForce); 
 
 
  public static int Connect(string remotePath, string localPath, string username, string password) 
  { 
   NETRESOURCE[] share_driver = new NETRESOURCE[1]; 
   share_driver[0].dwScope = RESOURCE_SCOPE.RESOURCE_GLOBALNET; 
   share_driver[0].dwType = RESOURCE_TYPE.RESOURCETYPE_DISK; 
   share_driver[0].dwDisplayType = RESOURCE_DISPLAYTYPE.RESOURCEDISPLAYTYPE_SHARE; 
   share_driver[0].dwUsage = RESOURCE_USAGE.RESOURCEUSAGE_CONNECTABLE; 
   share_driver[0].lpLocalName = localPath; 
   share_driver[0].lpRemoteName = remotePath; 
 
   Disconnect(localPath); 
   int ret = WNetAddConnection2A(share_driver, password, username, 1); 
 
   return ret; 
  } 
 
  public static int Disconnect(string localpath) 
  { 
   return WNetCancelConnection2A(localpath, 1, 1); 
  } 
 
} 

测试方法：

public void TestNetWorkConnection() 
  { 
   string localpath = "X:"; 
   //int status = NetworkConnection.Connect(@"//192.168.0.2/test", localpath, @"test", "test"); 
   int status = NetworkConnection.Connect("////192.168.0.2//test", localpath, @"test", "test"); 
   if (status == (int)ERROR_ID.ERROR_SUCCESS) 
   { 
    FileStream fs = new FileStream(localpath + @"//123.txt", FileMode.OpenOrCreate); 
    using (StreamWriter stream = new StreamWriter(fs)) 
    { 
     stream.WriteLine("你好呀，成功了"); 
     stream.Flush(); 
     stream.Close(); 
    } 
    fs.Close(); 
   } 
   else 
   { 
    Console.WriteLine(status); 
   } 
   NetworkConnection.Disconnect(localpath); 
  } 

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