C# Class to establish a network connection with credentials
001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 | using System;using System.Runtime.InteropServices;using BOOL = System.Int32;namespace NetworkConnection{ public class NetworkShare { #region Member Variables [DllImport("mpr.dll")] private static extern int WNetAddConnection2A(ref NetResource refNetResource, string inPassword, string inUsername, int inFlags); [DllImport("mpr.dll")] private static extern int WNetCancelConnection2A(string inServer, int inFlags, int inForce); private String _Server; private String _Share; private String _DriveLetter = null; private String _Username = null; private String _Password = null; private int _Flags = 0; private NetResource _NetResource = new NetResource(); BOOL _AllowDisconnectWhenInUse = 0; // 0 = False; Any other value is True; #endregion #region Constructors /// <summary> /// The default constructor /// </summary> public NetworkShare() { } /// <summary> /// This constructor takes a server and a share. /// </summary> public NetworkShare(String inServer, String inShare) { _Server = inServer; _Share = inShare; } /// <summary> /// This constructor takes a server and a share and a local drive letter. /// </summary> public NetworkShare(String inServer, String inShare, String inDriveLetter) { _Server = inServer; _Share = inShare; DriveLetter = inDriveLetter; } /// <summary> /// This constructor takes a server, share, username, and password. /// </summary> public NetworkShare(String inServer, String inShare, String inUsername, String inPassword) { _Server = inServer; _Share = inShare; _Username = inUsername; _Password = inPassword; } /// <summary> /// This constructor takes a server, share, drive letter, username, and password. /// </summary> public NetworkShare(String inServer, String inShare, String inDriveLetter, String inUsername, String inPassword) { _Server = inServer; _Share = inShare; _DriveLetter = inDriveLetter; _Username = inUsername; _Password = inPassword; } #endregion #region Properties public String Server { get { return _Server; } set { _Server = value; } } public String Share { get { return _Share; } set { _Share = value; } } public String FullPath { get { return string.Format(@"\\{0}\{1}", _Server, _Share); } } public String DriveLetter { get { return _DriveLetter; } set { SetDriveLetter(value); } } public String Username { get { return String.IsNullOrEmpty(_Username) ? null : _Username ; } set { _Username = value; } } public String Password { get { return String.IsNullOrEmpty(_Password) ? null : _Username; } set { _Password = value; } } public int Flags { get { return _Flags; } set { _Flags = value; } } public NetResource Resource { get { return _NetResource; } set { _NetResource = value; } } public bool AllowDisconnectWhenInUse { get { return Convert.ToBoolean(_AllowDisconnectWhenInUse); } set { _AllowDisconnectWhenInUse = Convert.ToInt32(value); } } #endregion #region Functions /// <summary> /// Establishes a connection to the share. /// /// Throws: /// /// /// </summary> public int Connect() { _NetResource.Scope = (int)Scope.RESOURCE_GLOBALNET; _NetResource.Type = (int)Type.RESOURCETYPE_DISK; _NetResource.DisplayType = (int)DisplayType.RESOURCEDISPLAYTYPE_SHARE; _NetResource.Usage = (int)Usage.RESOURCEUSAGE_CONNECTABLE; _NetResource.RemoteName = FullPath; _NetResource.LocalName = DriveLetter; return WNetAddConnection2A(ref _NetResource, _Password, _Username, _Flags); } /// <summary> /// Disconnects from the share. /// </summary> public int Disconnect() { int retVal = 0; if (null != _DriveLetter) { retVal = WNetCancelConnection2A(_DriveLetter, _Flags, _AllowDisconnectWhenInUse); retVal = WNetCancelConnection2A(FullPath, _Flags, _AllowDisconnectWhenInUse); } else { retVal = WNetCancelConnection2A(FullPath, _Flags, _AllowDisconnectWhenInUse); } return retVal; } private void SetDriveLetter(String inString) { if (inString.Length == 1) { if (char.IsLetter(inString.ToCharArray()[0])) { _DriveLetter = inString + ":"; } else { // The character is not a drive letter _DriveLetter = null; } } else if (inString.Length == 2) { char[] drive = inString.ToCharArray(); if (char.IsLetter(drive[0]) && drive[1] == ':') { _DriveLetter = inString; } else { // The character is not a drive letter _DriveLetter = null; } } else { // If we get here the value passed in is not valid // so make it null. _DriveLetter = null; } } #endregion #region NetResource Struct [StructLayout(LayoutKind.Sequential)] public struct NetResource { public uint Scope; public uint Type; public uint DisplayType; public uint Usage; public string LocalName; public string RemoteName; public string Comment; public string Provider; } #endregion #region Enums public enum Scope { RESOURCE_CONNECTED = 1, RESOURCE_GLOBALNET, RESOURCE_REMEMBERED, RESOURCE_RECENT, RESOURCE_CONTEXT } public enum Type : uint { RESOURCETYPE_ANY, RESOURCETYPE_DISK, RESOURCETYPE_PRINT, RESOURCETYPE_RESERVED = 8, RESOURCETYPE_UNKNOWN = 4294967295 } public enum DisplayType { RESOURCEDISPLAYTYPE_GENERIC, RESOURCEDISPLAYTYPE_DOMAIN, RESOURCEDISPLAYTYPE_SERVER, RESOURCEDISPLAYTYPE_SHARE, RESOURCEDISPLAYTYPE_FILE, RESOURCEDISPLAYTYPE_GROUP, RESOURCEDISPLAYTYPE_NETWORK, RESOURCEDISPLAYTYPE_ROOT, RESOURCEDISPLAYTYPE_SHAREADMIN, RESOURCEDISPLAYTYPE_DIRECTORY, RESOURCEDISPLAYTYPE_TREE, RESOURCEDISPLAYTYPE_NDSCONTAINER } public enum Usage : uint { RESOURCEUSAGE_CONNECTABLE = 1, RESOURCEUSAGE_CONTAINER = 2, RESOURCEUSAGE_NOLOCALDEVICE = 4, RESOURCEUSAGE_SIBLING = 8, RESOURCEUSAGE_ATTACHED = 16, RESOURCEUSAGE_ALL = 31, RESOURCEUSAGE_RESERVED = 2147483648 } public enum ConnectionFlags : uint { CONNECT_UPDATE_PROFILE = 1, CONNECT_UPDATE_RECENT = 2, CONNECT_TEMPORARY = 4, CONNECT_INTERACTIVE = 8, CONNECT_PROMPT = 16, CONNECT_NEED_DRIVE = 32, CONNECT_REFCOUNT = 64, CONNECT_REDIRECT = 128, CONNECT_LOCALDRIVE = 256, CONNECT_CURRENT_MEDIA = 512, CONNECT_DEFERRED = 1024, CONNECT_COMMANDLINE = 2048, CONNECT_CMD_SAVECRED = 4096, CONNECT_CRED_RESET = 8192, CONNECT_RESERVED = 4278190080 } #endregion }} |
Hopefully I will get time to explain what is going on here.
Thanks, this is great stuff! Thanks for showing how to do this.