Access

UncAccess.cs

/// <summary>
    /// Helper methods for mounting a UNC network share
    /// </summary>
    public class UncAccess
    {
        /// <summary>The domain.</summary>
        private string domain;

        /// <summary>The last error.</summary>
        private int lastError;

        /// <summary>The password.</summary>
        private string password;

        /// <summary>The unc path.</summary>
        private string uncPath;

        /// <summary>The user.</summary>
        private string user;

        /// <summary>Initialises a new instance of the <see cref="UncAccess"/> class.</summary>
        public UncAccess()
        {
        }

        /// <summary>Initialises a new instance of the <see cref="UncAccess"/> class.</summary>
        /// <param name="uncPath">The unc path.</param>
        /// <param name="user">The user.</param>
        /// <param name="domain">The domain.</param>
        /// <param name="password">The password.</param>
        public UncAccess(string uncPath, string user, string domain, string password)
        {
            this.Login(uncPath, user, domain, password);
        }

        /// <summary>Gets the last error.</summary>
        public int LastError
        {
            get
            {
                return this.lastError;
            }
        }

        /// <summary>
        /// Closes the UNC share
        /// </summary>
        /// <returns>True if closing was successful</returns>
        public bool NetUseDelete()
        {
            try
            {
                var returncode = NetUseDel(null, this.uncPath, 2);
                this.lastError = (int)returncode;
                return returncode == 0;
            }
            catch
            {
                this.lastError = Marshal.GetLastWin32Error();
                return false;
            }
        }

        /// <summary>Connects to a UNC share folder with credentials</summary>
        /// <param name="uncPath">The unc Path.</param>
        /// <param name="user">The user.</param>
        /// <param name="domain">The domain.</param>
        /// <param name="password">The password.</param>
        /// <returns>True if login was successful</returns>
        public bool Login(string uncPath, string user, string domain, string password)
        {
            this.uncPath = uncPath;
            this.user = user;
            this.password = password;
            this.domain = domain;
            return this.NetUseWithCredentials();
        }

        /// <summary>The net use add.</summary>
        /// <param name="uncServerName">The unc server name.</param>
        /// <param name="level">The level.</param>
        /// <param name="buf">The buf.</param>
        /// <param name="parmError">The parm error.</param>
        /// <returns>The <see cref="uint"/>.</returns>
        [DllImport("NetApi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern uint NetUseAdd(string uncServerName, uint level, ref UseInfo2 buf, out uint parmError);

        /// <summary>The net use del.</summary>
        /// <param name="uncServerName">The unc server name.</param>
        /// <param name="useName">The use name.</param>
        /// <param name="forceCond">The force cond.</param>
        /// <returns>The <see cref="uint"/>.</returns>
        [DllImport("NetApi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern uint NetUseDel(string uncServerName, string useName, uint forceCond);

        /// <summary>The net use with credentials.</summary>
        /// <returns>The <see cref="bool"/>.</returns>
        private bool NetUseWithCredentials()
        {
            try
            {
                var useinfo = new UseInfo2
                                  {
                                      ui2_remote = this.uncPath, ui2_username = this.user, ui2_domainname = this.domain, ui2_password = this.password, 
                                      ui2_asg_type = 0, ui2_usecount = 1
                                  };

                uint paramErrorIndex;
                var returncode = NetUseAdd(null, 2, ref useinfo, out paramErrorIndex);
                this.lastError = (int)returncode;
                return returncode == 0;
            }
            catch
            {
                this.lastError = Marshal.GetLastWin32Error();
                return false;
            }
        }

        /// <summary>The use info 2.</summary>
        [SuppressMessage("StyleCop.CSharp.NamingRules", "SA1310:FieldNamesMustNotContainUnderscore", Justification = "Reviewed. Suppression is OK here.")]
        [SuppressMessage("StyleCop.CSharp.NamingRules", "SA1307:AccessibleFieldsMustBeginWithUpperCaseLetter", 
            Justification = "Reviewed. Suppression is OK here.")]
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct UseInfo2
        {
            /// <summary>The ui 2_local.</summary>
            internal string ui2_local;

            /// <summary>The ui 2_remote.</summary>
            internal string ui2_remote;

            /// <summary>The ui 2_password.</summary>
            internal string ui2_password;

            /// <summary>The ui 2_status.</summary>
            internal uint ui2_status;

            /// <summary>The ui 2_asg_type.</summary>
            internal uint ui2_asg_type;

            /// <summary>The ui 2_refcount.</summary>
            internal uint ui2_refcount;

            /// <summary>The ui 2_usecount.</summary>
            internal uint ui2_usecount;

            /// <summary>The ui 2_username.</summary>
            internal string ui2_username;

            /// <summary>The ui 2_domainname.</summary>
            internal string ui2_domainname;
        }
    }