void DockingTabControl_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e) { //判断是否拖入其中 if (moveNewWindow) { var c = e.GetPosition(this); if ((c.X >= _tabPanelEmt.TabPanelStartPoint.X && c.X <= _tabPanelEmt.TabPanelStartPoint.X + _tabPanelEmt.TabPanelSize.Width) && (c.Y >= _tabPanelEmt.TabPanelStartPoint.Y && c.Y <= _tabPanelEmt.TabPanelStartPoint.Y + _tabPanelEmt.TabPanelSize.Height)) { if (this.Items.Contains(_curMoveWindow.DragTargetHeader)) { var newTabItem = _curMoveWindow.DragTargetHeader as TabItem; if (newTabItem != null) { newTabItem.Opacity = 1; } _curMoveWindow.DragWindow.Close(); } else { if (this.Items.Contains(_curMoveWindow.DragTargetHeader)) { this.Items.Remove(_curMoveWindow.DragTargetHeader); } } } else { _curMoveWindow.DragWindow.Topmost = false; } moveNewWindow = false; _tbPanel.ReleaseMouseCapture(); _curMoveWindow = null; } else { _isBtnDown = false; var a = e.Source as TabItem; if (a != null) { a.ReleaseMouseCapture(); } if (_curMoveWindow != null) { this.Items.Remove(_curMoveWindow.DragTargetHeader); _curMoveWindow.DragWindow.Topmost = false; _curMoveWindow = null; } } }