MDI中的ToolStrip合并

Form1(MDIParent)

public partial class Form1 : Form
{
    public interface ITools
    {
        ToolStrip CipherToolStrip
        {
            get;
        }
    }

    public Form1()
    {
        InitializeComponent();
    }

    private void newToolStripMenuItem_Click(object sender, EventArgs e)
    {
        Form2 f2 = new Form2();
        f2.MdiParent = this;
        f2.Show();
    }

    private void Form1_MdiChildActivate(object sender, EventArgs e)
    {
        ToolStripManager.RevertMerge(MDIParent);
        if (this.ActiveMdiChild != null)
        {
            if ((ActiveMdiChild as ITools).CipherToolStrip != null)
            {
                ToolStripManager.Merge((ActiveMdiChild as ITools).CipherToolStrip, MDIParent);
            }
        }

        if (MDIParent.Items.Count > 0)
            MDIParent.Visible = true;
        else
            MDIParent.Visible = false;
    }
}

Form2(MDIChild)

public partial class Form2 : Form, Form1.ITools
{
    public ToolStrip CipherToolStrip
    {
        get
        {
            return MDIChild;
        }
    }

    public Form2()
    {
        InitializeComponent();
    }

    private void Form2_Load(object sender, EventArgs e)
    {
        MDIChild.Visible = false;
        ControlBox = false;
    }
}

通过设置 MergeAction 和 MergeIndex 可以修改合并的方式与位置。

  

运行结果如下：