'Declaration Public ReadOnly Property RootLocation As UltraNavigationBarRootLocation
public UltraNavigationBarRootLocation RootLocation {get;}
The RootLocation always appears in the navigation path; when no location has been selected by the end user, the SelectedLocation returns a reference to the root location.
Note: The dropdown button cannot be hidden for the root location, i.e., the UltraNavigationBarLocationSettings.DropDownButtonVisible property is effectively read-only; attempting to hide the dropdown button causes an exception to be thrown.
Note: The UltraNavigationBarRootLocation.IsSelected property always returns true, i.e., the root location is always in the selected state.
Imports System Imports System.Drawing Imports System.IO Imports System.Collections.Generic Imports System.ComponentModel Imports Infragistics.Shared Imports Infragistics.Win Imports Infragistics.Win.Misc Imports Infragistics.Win.Misc.UltraWinNavigationBar Imports Infragistics.Win.UltraWinTree Public Class FileSystemSupport Private Const PATH_SEPARATOR As String = "\" Private navigationBar As UltraNavigationBar = Nothing Private tree As UltraTree = Nothing Public Sub Populate() ' Set up the root location to represent the 'Computer' location. Dim rootLocation As UltraNavigationBarLocation = Me.navigationBar.RootLocation ' Remove any existing members from the root's Locations collection. If (rootLocation.HasLocations) Then rootLocation.Locations.Clear() ' Clear the tree's Nodes collection and add the root node. Me.tree.Nodes.Clear() Dim rootNode As UltraTreeNode = Me.tree.Nodes.Add("Computer", "Computer") ' Set the Text for the root location and root node rootLocation.Text = rootNode.Text ' Note that we set the IncludeTextInFullPath property to false ' so that directory paths can be parsed without the end user ' having to type the name of the root. This will also prevent ' the text from appearing when the control is in edit mode. rootLocation.IncludeTextInFullPath = False ' Add the logical drives of this local machine to the root's Locations/Nodes collections. Dim locations As NavigationBarLocationsCollection = rootLocation.Locations Dim nodes As TreeNodesCollection = rootNode.Nodes ' Assign the appropriate image to the root location/node rootLocation.Settings.Appearance.Image = Me.GetImage(Images.Computer) rootNode.Override.NodeAppearance.Image = Me.GetImage(Images.Computer) Dim drives() As DriveInfo = DriveInfo.GetDrives() Dim i As Integer For i = 0 To drives.Length - 1 Dim drive As DriveInfo = drives(i) ' Skip the drives we don't want to present to the end user. If (drive.DriveType = DriveType.Ram Or drive.DriveType = DriveType.NoRootDirectory Or drive.IsReady = False) Then Continue For End If ' Get the name of the drive, and remove the path separator. ' Also, get the volume name and use 'Local Disk' if none is assigned. Dim driveName As String = drive.Name driveName = driveName.Replace(PATH_SEPARATOR, String.Empty) Dim volumeLabel As String = drive.VolumeLabel volumeLabel = iif(Not volumeLabel Is Nothing AndAlso volumeLabel.Length > 0, volumeLabel, "Local Disk") ' Create a new UltraNavigationBarLocation instance, using the drive's name ' as the key, and the volume label/drive name as the DisplayText. Dim location As UltraNavigationBarLocation = New UltraNavigationBarLocation(driveName, driveName) ' Use the DisplayText property to format the combination of the drive letter ' and volume name so that we present it to the end user in a readable form. location.DisplayText = String.Format("{0} ({1})", volumeLabel, driveName) ' Add the location to the root's Locations collection. locations.Add(location) ' Add an accompanying tree node for the location we just added Dim node As UltraTreeNode = rootNode.Nodes.Add(location.Key, location.DisplayTextResolved) ' Assign the appropriate image to the location/node location.Settings.Appearance.Image = Me.GetImage(drive.DriveType) node.Override.NodeAppearance.Image = Me.GetImage(drive.DriveType) ' Assign an instance of a wrapper class which associates the node, ' location and directory to each object to the Tag property. node.Tag = New DirectoryWrapper(drive.RootDirectory, location) location.Tag = New DirectoryWrapper(drive.RootDirectory, node) Next End Sub End Class
using System; using System.Drawing; using System.IO; using System.Collections.Generic; using System.ComponentModel; using Infragistics.Shared; using Infragistics.Win; using Infragistics.Win.Misc; using Infragistics.Win.Misc.UltraWinNavigationBar; using Infragistics.Win.UltraWinTree; public class FileSystemSupport { private static readonly string PATH_SEPARATOR = "\\"; private UltraNavigationBar navigationBar = null; private UltraTree tree = null; public void Populate() { try { System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.WaitCursor; // Set up the root location to represent the 'Computer' location. UltraNavigationBarLocation rootLocation = this.navigationBar.RootLocation; // Remove any existing members from the root's Locations collection. if ( rootLocation.HasLocations ) rootLocation.Locations.Clear(); // Clear the tree's Nodes collection and add the root node. this.tree.Nodes.Clear(); UltraTreeNode rootNode = this.tree.Nodes.Add( "Computer", "Computer" ); // Set the Text for the root location and root node rootLocation.Text = rootNode.Text; // Note that we set the IncludeTextInFullPath property to false // so that directory paths can be parsed without the end user // having to type the name of the root. This will also prevent // the text from appearing when the control is in edit mode. rootLocation.IncludeTextInFullPath = false; // Add the logical drives of this local machine to the root's Locations/Nodes collections. NavigationBarLocationsCollection locations = rootLocation.Locations; TreeNodesCollection nodes = rootNode.Nodes; // Assign the appropriate image to the root location/node rootLocation.Settings.Appearance.Image = this.GetImage(Images.Computer); rootNode.Override.NodeAppearance.Image = this.GetImage(Images.Computer); DriveInfo[] drives = DriveInfo.GetDrives(); for ( int i = 0; i < drives.Length; i ++ ) { DriveInfo drive = drives[i]; // Skip the drives we don't want to present to the end user. if ( drive.DriveType == DriveType.Ram || drive.DriveType == DriveType.NoRootDirectory || drive.IsReady == false ) continue; // Get the name of the drive, and remove the path separator. // Also, get the volume name and use 'Local Disk' if none is assigned. string driveName = drive.Name; driveName = driveName.Replace( PATH_SEPARATOR, string.Empty ); string volumeLabel = drive.VolumeLabel; volumeLabel = volumeLabel != null && volumeLabel.Length > 0 ? volumeLabel : "Local Disk"; // Create a new UltraNavigationBarLocation instance, using the drive's name // as the key, and the volume label/drive name as the DisplayText. UltraNavigationBarLocation location = new UltraNavigationBarLocation( driveName, driveName ); // Use the DisplayText property to format the combination of the drive letter // and volume name so that we present it to the end user in a readable form. location.DisplayText = string.Format("{0} ({1})", volumeLabel, driveName ); // Add the location to the root's Locations collection. locations.Add( location ); // Add an accompanying tree node for the location we just added UltraTreeNode node = rootNode.Nodes.Add( location.Key, location.DisplayTextResolved ); // Assign the appropriate image to the location/node location.Settings.Appearance.Image = this.GetImage(drive.DriveType); node.Override.NodeAppearance.Image = this.GetImage(drive.DriveType); // Assign an instance of a wrapper class which associates the node, // location and directory to each object to the Tag property. node.Tag = new DirectoryWrapper( drive.RootDirectory, location ); location.Tag = new DirectoryWrapper( drive.RootDirectory, node ); } } finally { System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default; } } }
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2