dockpanel.FloatForm意外为null

Question

以下代码给我一个空引用。

foreach (DockPanel dockPanel in dockManager1.Panels){
dockPanel.MakeFloat();
tabbedView1.Controller.CreateNewDocumentGroup(tabbedView1.Controller.RegisterDockPanel(dockPanel.FloatForm) as Document); 
}

dockPanel.FloatForm特别在调试器中显示为NULL，即使MakeFloat（）;应该设置它http://documentation.devexpress.com/#WindowsForms/DevExpressXtraBarsDockingDockPanel_MakeFloattopic379

Answer 1

没有理由使用DockPanel.MakeFloat方法将停靠面板停靠为选项卡式文档。您应该使用DockPanel.DockAsMdiDocument方法。 因此，正确的代码应如下所示：

foreach(DockPanel dockPanel in dockManager1.Panels) {
    if(dockPanel.DockAsMdiDocument()) {
        var document = tabbedView1.Manager.GetDocument(dockPanel) as Document;
        tabbedView1.Controller.CreateNewDocumentGroup(document);
    }
}