学习笔记，转载请注明出处！
运用ToolStripManager可以实现ToolStrip工具条的合并，下面是多文档应用程序开发中将文档子窗体的菜单和工具条合并到父窗体中用的的部分代码！合并，需要父窗体有ToolStripPanel和ToolStrip。MenuStrip是ToolStrip的子类，当然也可以实现合并了！这个类的使用需要好好揣摩学习。
1 protected override void OnMdiChildActivate(EventArgs e)
2 {
3 DocumentForm olddocument = m_activeDocument;
4 base.OnMdiChildActivate(e);
5 m_activeDocument = this.ActiveMdiChild as DocumentForm;
6 foreach (Control ctrl in Controls)
7 {
8 if (ctrl is ToolStripPanel)
9 ((ToolStripPanel)ctrl).SuspendLayout();
10 }
11 if (m_activeDocument != null)
12 {
13 ToolStripManager.RevertMerge(m_menuItems.GetStrip("edit"));
14 ToolStripManager.RevertMerge(m_menuItems.GetStrip("draw"));
15 ToolStripManager.RevertMerge(m_menuItems.GetStrip("layer"));
16 ToolStripManager.RevertMerge(m_menuItems.GetStrip("status"));
17 ToolStripManager.RevertMerge(m_menuItems.GetStrip("modify"));
18 ToolStripManager.Merge(m_activeDocument.GetToolStrip("draw"), m_menuItems.GetStrip("draw"));
19 ToolStripManager.Merge(m_activeDocument.GetToolStrip("edit"), m_menuItems.GetStrip("edit"));
20 ToolStripManager.Merge(m_activeDocument.GetToolStrip("layer"), m_menuItems.GetStrip("layer"));
21 ToolStripManager.Merge(m_activeDocument.GetToolStrip("status"), m_menuItems.GetStrip("status"));
22 ToolStripManager.Merge(m_activeDocument.GetToolStrip("modify"), m_menuItems.GetStrip("modify"));
23 }
24 foreach (Control ctrl in Controls)
25 {
26 if (ctrl is ToolStripPanel)
27 ((ToolStripPanel)ctrl).ResumeLayout();
28 }
29 }
个人学习示例结果：
1 protected override void OnMdiChildActivate(EventArgs e)
2 {
3 base.OnMdiChildActivate(e);
4 foreach (Control ctrl in Controls)
5 {
6 if (ctrl is ToolStripPanel)
7 ((ToolStripPanel)ctrl).SuspendLayout();
8 }
9 if (this.ActiveMdiChild != null && this.Disposing==false) // 修改前代码为if (this.ActiveMdiChild != null )
10 {
11 bool res= ToolStripManager.RevertMerge(m_MapViewTools);
12 ToolStripManager.RevertMerge(m_SceneViewTools);
13 bool res2=ToolStripManager.Merge(m_MapView.BasicMapTools,m_MapViewTools );
14 ToolStripManager.Merge(m_SceneView.BasicSceneTools, m_SceneViewTools);
15 //MessageBox.Show(res2.ToString());
16 if (this.ActiveMdiChild.Name == "MapControlView")
17 {
18 m_MapView.EnableAllTools();
19 m_SceneView.DisableAllTools();
20 m_Explorer.axTOCControl1.SetBuddyControl(m_MapView.MyMapControl);//报错处
21
22
23 }
24 else if (this.ActiveMdiChild.Name == "SceneControlView")
25 {
26 m_MapView.DisableAllTools();
27 m_SceneView.EnableAllTools();
28 m_Explorer.axTOCControl1.SetBuddyControl(m_SceneView.MySceneControl);
29 }
30 }
31
32 foreach (Control ctrl in Controls)
33 {
34 if (ctrl is ToolStripPanel)
35 ((ToolStripPanel)ctrl).ResumeLayout();
36 }
37 }
（1 
（2
其他：在关闭父窗体的时候报错“COM 对象与其基础 RCW 分开后就不能再使用。”这句话倒很好理解，但是到底什么原因？个人猜想是TOC窗体先销毁，然后销毁Map和Scene视图所致！所以修改了代码，增加了主窗体是否销毁中 if (this.ActiveMdiChild != null && this.Disposing==false) 。