'Declaration Public Event Closing As EventHandler(Of TabClosingEventArgs)
public event EventHandler<TabClosingEventArgs> Closing
The event handler receives an argument of type TabClosingEventArgs containing data related to this event. The following TabClosingEventArgs properties provide information specific to this event.
| Property | Description |
|---|---|
| Cancel (Inherited from Infragistics.Windows.Controls.Events.CancelableRoutedEventArgs) | Gets/sets a boolean indicating whether the associated operation should be cancelled. |
| Handled (Inherited from System.Windows.RoutedEventArgs) | Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. |
| OriginalSource (Inherited from System.Windows.RoutedEventArgs) | Gets the original reporting source as determined by pure hit testing, before any possible System.Windows.RoutedEventArgs.Source adjustment by a parent class. |
| RoutedEvent (Inherited from System.Windows.RoutedEventArgs) | Gets or sets the System.Windows.RoutedEventArgs.RoutedEvent associated with this System.Windows.RoutedEventArgs instance. |
| Source (Inherited from System.Windows.RoutedEventArgs) | Gets or sets a reference to the object that raised the event. |
public partial class Window1 : Window { public Window1() { InitializeComponent(); // Allow tab closing by default. this.xamTabControl1.AllowTabClosing = true; // Note: tab closing can be overriden on each TabItemEx by setting its AllowClosing // property, e.g. ((TabItemEx)this.xamTabControl1.Items[0]).AllowClosing = false; // Show a close button in the tab header area that will close the selected tab this.xamTabControl1.ShowTabHeaderCloseButton = true; // Show a close button in the TabItemEx if the tab is selected // or if the mouse is over it. this.xamTabControl1.TabItemCloseButtonVisibility = TabItemCloseButtonVisibility.WhenSelectedOrHotTracked; // Note: tab item close button visibility can be overriden on each TabItemEx by // setting its CloseButtonVisibility property, e.g. ((TabItemEx)this.xamTabControl1.Items[2]).CloseButtonVisibility = TabItemCloseButtonVisibility.Hidden; // Wire the Closing event for a specific tab. Setting Cancel to true inside the event will // prevent the tab from being closed ((TabItemEx)this.xamTabControl1.Items[1]).Closing += new EventHandler<TabClosingEventArgs>(tabItemEx2_Closing); // Note: when the XamTabControl closes a tab it leaves it in the Items // collection and just sets the tab item's Visibility to 'Collapsed'. // Therefore, to unclose a tab set its Visibility property back to 'Visible' // (see the btnUncloseAllTabs_Click event handler below). } private void tabItemEx2_Closing(object sender, TabClosingEventArgs e) { // Setting Cancel to true will prevent the tab from being closed e.Cancel = true; } private void btnUncloseAllTabs_Click(object sender, RoutedEventArgs e) { int count = this.xamTabControl1.Items.Count; ItemContainerGenerator generator = this.xamTabControl1.ItemContainerGenerator; // loop over all the tab items in the XamTabControl and set their // Visibility property to 'Visibile' to un-close them. for (int i = 0; i < count; i++) { TabItem tabItem = generator.ContainerFromIndex(i) as TabItem; if (tabItem != null) tabItem.Visibility = Visibility.Visible; } }
Imports Infragistics.Windows.Controls Imports Infragistics.Windows.Controls.Events Imports System.Windows.Controls.Primitives Imports System.Diagnostics Imports System.Windows Class Window1 Public Sub New() ' This call is required by the Windows Form Designer. InitializeComponent() ' Add any initialization after the InitializeComponent() call. ' Allow tab closing by default. Me.XamTabControl1.AllowTabClosing = True ' Note: tab closing can be overriden on each TabItemEx by setting its AllowClosing ' property, e.g. TryCast(Me.XamTabControl1.Items(0), TabItemEx).AllowClosing = False ' Show a close button in the tab header area that will close the selected tab Me.XamTabControl1.ShowTabHeaderCloseButton = True ' Show a close button in the TabItemEx if the tab is selected ' or if the mouse is over it. Me.XamTabControl1.TabItemCloseButtonVisibility = TabItemCloseButtonVisibility.WhenSelectedOrHotTracked ' Note: tab item close button visibility can be overriden on each TabItemEx by ' setting its CloseButtonVisibility property, e.g. TryCast(Me.XamTabControl1.Items(2), TabItemEx).CloseButtonVisibility = TabItemCloseButtonVisibility.Hidden Dim tab As TabItemEx = TryCast(Me.XamTabControl1.Items(1), TabItemEx) ' Wire the Closing event for a specific tab. Setting Cancel to true inside the event will ' prevent the tab from being closed AddHandler tab.Closing, AddressOf tabItem_Closing ' Note: when the XamTabControl closes a tab it leaves it in the Items ' collection and just sets the tab item's Visibility to 'Collapsed'. ' Therefore, to unclose a tab set its Visibility property back to 'Visible' ' (see the btnUncloseAllTabs_Click event handler below). End Sub Private Sub tabItem_Closing(ByVal sender As Object, ByVal e As TabClosingEventArgs) ' Setting Cancel to true will prevent the tab from being closed e.Cancel = True End Sub Private Sub btnUncloseAllTabs_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Dim count As Int32 = Me.XamTabControl1.Items.Count Dim generator As ItemContainerGenerator = Me.XamTabControl1.ItemContainerGenerator Dim tabItem As TabItem ' loop over all the tab items in the XamTabControl and set their ' Visibility property to 'Visibile' to un-close them. For i As Int32 = 0 To count - 1 tabItem = TryCast(generator.ContainerFromIndex(i), TabItem) If Not tabItem Is Nothing Then tabItem.Visibility = Visibility.Visible End If Next End Sub
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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