Question

Is it possible to rearrange tab items in tab control in run time? For example I have 3 tab items which are about cars and 4 tabs about house. I want to be able to rearrange them using drag and drop. Is it possible or it is something fantastic?

I have Tab Control here is XAML.

<TabControl x:Name="tc" Visibility="Collapsed" GotFocus="Focus" AllowDrop="True" >
            </TabControl>

Tab items will be added in runtime.
Thanks for helping me!

Answer 1

found a solution in the MSDN forum.

Here is the link:

DragDrop TabItem

Here is the solution:

C# solution

WPF code:

<TabControl>
    <TabControl.Resources>
        <Style TargetType="TabItem">
            <Setter Property="AllowDrop" Value="True"/>
                <EventSetter Event="PreviewMouseMove" Handler="TabItem_PreviewMouseMove"/>
                <EventSetter Event="Drop" Handler="TabItem_Drop"/>
        </Style>
    </TabControl.Resources>

    <TabItem Header="Tabitem 1"/>
    <TabItem Header="Tabitem 2"/>
    <TabItem Header="Tabitem 3"/>
    <TabItem Header="Tabitem 4"/>
    <TabItem Header="Tabitem 5"/>
</TabControl>

C# code behind:

private void TabItem_PreviewMouseMove(object sender, MouseEventArgs e)
{
    if (!(e.Source is TabItem tabItem))
    {
        return;
    }

    if (Mouse.PrimaryDevice.LeftButton == MouseButtonState.Pressed)
    {
        DragDrop.DoDragDrop(tabItem, tabItem, DragDropEffects.All);
    }
}

private void TabItem_Drop(object sender, DragEventArgs e)
{
    if (e.Source is TabItem tabItemTarget &&
        e.Data.GetData(typeof(TabItem)) is TabItem tabItemSource &&
        !tabItemTarget.Equals(tabItemSource) &&
        tabItemTarget.Parent is TabControl tabControl)
    {
        int targetIndex = tabControl.Items.IndexOf(tabItemTarget);

        tabControl.Items.Remove(tabItemSource);
        tabControl.Items.Insert(targetIndex, tabItemSource);
        tabItemSource.IsSelected = true;
    }
}