Improved support for network locations (#3295)

Author: gave92

Files.Launcher/Files.Launcher.csproj

@@ -129,6 +129,7 @@
     <Compile Include="DragDropForm.cs">
       <SubType>Form</SubType>
     </Compile>
+    <Compile Include="NetworkDrivesAPI.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="QuickLook.cs" />
@@ -157,6 +158,9 @@
     <PackageReference Include="System.Runtime.WindowsRuntime.UI.Xaml">
       <Version>4.7.0</Version>
     </PackageReference>
+    <PackageReference Include="Vanara.PInvoke.Mpr">
+      <Version>3.3.4</Version>
+    </PackageReference>
     <PackageReference Include="Vanara.Windows.Shell">
       <Version>3.3.4</Version>
     </PackageReference>

Files.Launcher/NetworkDrivesAPI.cs

@@ -0,0 +1,122 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+using Vanara.Extensions;
+using Vanara.InteropServices;
+using static Vanara.PInvoke.Mpr;
+
+namespace FilesFullTrust
+{
+    public class NetworkDrivesAPI
+    {
+		/// <summary>
+		/// A dialog box that allows the user to browse and connect to network resources.
+		/// </summary>
+		public class NetworkConnectionDialog : CommonDialog
+		{
+			private NETRESOURCE nres = new NETRESOURCE();
+			private CONNECTDLGSTRUCT opts;
+
+			/// <summary>Initializes a new instance of the <see cref="NetworkConnectionDialog"/> class.</summary>
+			public NetworkConnectionDialog()
+			{
+				opts.cbStructure = (uint)Marshal.SizeOf(typeof(CONNECTDLGSTRUCT));
+				nres.dwType = NETRESOURCEType.RESOURCETYPE_DISK;
+			}
+
+			/// <summary>Gets the connected device number. This value is only valid after successfully running the dialog.</summary>
+			/// <value>The connected device number. The value is 1 for A:, 2 for B:, 3 for C:, and so on. If the user made a deviceless connection, the value is –1.</value>
+			[Browsable(false)]
+			public int ConnectedDeviceNumber => opts.dwDevNum;
+
+			/// <summary>Gets or sets a value indicating whether to hide the check box allowing the user to restore the connection at logon.</summary>
+			/// <value><c>true</c> if hiding restore connection check box; otherwise, <c>false</c>.</value>
+			[DefaultValue(false), Category("Appearance"), Description("Hide the check box allowing the user to restore the connection at logon.")]
+			public bool HideRestoreConnectionCheckBox
+			{
+				get => opts.dwFlags.IsFlagSet(CONN_DLG.CONNDLG_HIDE_BOX);
+				set => opts.dwFlags = opts.dwFlags.SetFlags(CONN_DLG.CONNDLG_HIDE_BOX, value);
+			}
+
+			/// <summary>Gets or sets a value indicating whether restore the connection at logon.</summary>
+			/// <value><c>true</c> to restore connection at logon; otherwise, <c>false</c>.</value>
+			[DefaultValue(false), Category("Behavior"), Description("Restore the connection at logon.")]
+			public bool PersistConnectionAtLogon
+			{
+				get => opts.dwFlags.IsFlagSet(CONN_DLG.CONNDLG_PERSIST);
+				set
+				{
+					opts.dwFlags = opts.dwFlags.SetFlags(CONN_DLG.CONNDLG_PERSIST, value);
+					opts.dwFlags = opts.dwFlags.SetFlags(CONN_DLG.CONNDLG_NOT_PERSIST, !value);
+				}
+			}
+
+			/// <summary>
+			/// Gets or sets a value indicating whether to display a read-only path instead of allowing the user to type in a path. This is only
+			/// valid if <see cref="RemoteNetworkName"/> is not <see langword="null"/>.
+			/// </summary>
+			/// <value><c>true</c> to display a read only path; otherwise, <c>false</c>.</value>
+			[DefaultValue(false), Category("Appearance"), Description("Display a read-only path instead of allowing the user to type in a path.")]
+			public bool ReadOnlyPath { get; set; }
+
+			/// <summary>Gets or sets the name of the remote network.</summary>
+			/// <value>The name of the remote network.</value>
+			[DefaultValue(null), Category("Behavior"), Description("The value displayed in the path field.")]
+			public string RemoteNetworkName { get => nres.lpRemoteName; set => nres.lpRemoteName = value; }
+
+			/// <summary>Gets or sets a value indicating whether to enter the most recently used paths into the combination box.</summary>
+			/// <value><c>true</c> to use MRU path; otherwise, <c>false</c>.</value>
+			/// <exception cref="InvalidOperationException">UseMostRecentPath</exception>
+			[DefaultValue(false), Category("Behavior"), Description("Enter the most recently used paths into the combination box.")]
+			public bool UseMostRecentPath
+			{
+				get => opts.dwFlags.IsFlagSet(CONN_DLG.CONNDLG_USE_MRU);
+				set
+				{
+					if (value && !string.IsNullOrEmpty(RemoteNetworkName))
+						throw new InvalidOperationException($"{nameof(UseMostRecentPath)} cannot be set to true if {nameof(RemoteNetworkName)} has a value.");
+					opts.dwFlags = opts.dwFlags.SetFlags(CONN_DLG.CONNDLG_USE_MRU, value);
+				}
+			}
+
+			/// <inheritdoc/>
+			public override void Reset()
+			{
+				opts.dwDevNum = -1;
+				opts.dwFlags = 0;
+				opts.lpConnRes = IntPtr.Zero;
+				ReadOnlyPath = false;
+			}
+
+			/// <inheritdoc/>
+			protected override bool RunDialog(IntPtr hwndOwner)
+			{
+				using (var lpnres = SafeCoTaskMemHandle.CreateFromStructure(nres))
+				{
+					opts.hwndOwner = hwndOwner;
+					opts.lpConnRes = lpnres.DangerousGetHandle();
+					if (ReadOnlyPath && !string.IsNullOrEmpty(nres.lpRemoteName))
+						opts.dwFlags |= CONN_DLG.CONNDLG_RO_PATH;
+					var ret = WNetConnectionDialog1(opts);
+					opts.lpConnRes = IntPtr.Zero;
+					if (ret == unchecked((uint)-1)) return false;
+					ret.ThrowIfFailed();
+					return true;
+				}
+			}
+		}
+
+		public static bool OpenMapNetworkDriveDialog()
+        {
+			using var ncd = new NetworkConnectionDialog { UseMostRecentPath = true };
+			ncd.HideRestoreConnectionCheckBox = false;
+			return ncd.ShowDialog() == DialogResult.OK;
+		}
+
+		public static bool DisconnectNetworkDrive(string drive)
+		{
+			return !WNetCancelConnection2(drive.TrimEnd('\\'), CONNECT.CONNECT_UPDATE_PROFILE, true).Failed;
+		}
+	}
+}