We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy. (Last updated on: November 16, 2018).
Unfortunately, activation email could not send to your email. Please try again.
Syncfusion Feedback

How to avoid tab selection in TabbedDockControls when dragging over mouse in unselected TabbedDockControl?

Platform: WinForms |
Control: DockingManager |
Published Date: April 30, 2011 |
Last Revised Date: July 10, 2014


Unselected TabbedDockControl gets selected when dragging and dropping any element from the TabbedDockControl. This can be avoided using SelectedIndexChanging event of the embedded TabControl of the TabbedDockControl.


private void dockingManager1_NewDockStateEndLoad(object sender, EventArgs e)


Syncfusion.Windows.Forms.Tools.DockHost dhost = this.panel1.Parent as Syncfusion.Windows.Forms.Tools.DockHost;

Syncfusion.Windows.Forms.Tools.DockHostController dhc = dhost.InternalController as


if (dhc.ParentController is Syncfusion.Windows.Forms.Tools.DockTabController)


Syncfusion.Windows.Forms.Tools.DockTabControl docktab = (dhc.ParentController as


docktab.SelectedIndexChanging += new Syncfusion.Windows.Forms.Tools.SelectedIndexChangingEventHandler




void docktab_SelectedIndexChanging(object sender, Syncfusion.Windows.Forms.Tools.SelectedIndexChangingEventArgs args)


if (flag ==false)


if (args.NewSelectedIndex == 0)


args.Cancel = true;





Private Sub dockingManager1_NewDockStateEndLoad(ByVal sender As Object, ByVal e As EventArgs) Handles dockingManager1.NewDockStateEndLoad

Dim dhost As Syncfusion.Windows.Forms.Tools.DockHost = TryCast(Me.panel1.Parent, Syncfusion.Windows.Forms.Tools.DockHost)

Dim dhc As Syncfusion.Windows.Forms.Tools.DockHostController = TryCast(dhost.InternalController, Syncfusion.Windows.Forms.Tools.DockHostController)

If TypeOf dhc.ParentController Is Syncfusion.Windows.Forms.Tools.DockTabController Then

Dim docktab As Syncfusion.Windows.Forms.Tools.DockTabControl = (TryCast(dhc.ParentController, Syncfusion.Windows.Forms.Tools.DockTabController)).TabControl

AddHandler docktab.SelectedIndexChanging, AddressOf docktab_SelectedIndexChanging

End If

End Sub

Private Sub docktab_SelectedIndexChanging(ByVal sender As Object, ByVal args As Syncfusion.Windows.Forms.Tools.SelectedIndexChangingEventArgs)

If flag =False Then

If args.NewSelectedIndex = 0 Then

args.Cancel = True

End If

End If

End Sub



You must log in to leave a comment

Please sign in to access our KB

This page will automatically be redirected to the sign-in page in 10 seconds.

Warning Icon You are using an outdated version of Internet Explorer that may not display all features of this and other websites. Upgrade to Internet Explorer 8 or newer for a better experience.Close Icon