private void MainForm_Load(object sender, EventArgs e)
{
    this.menuStrip1.Items.Clear();

    DataSet ds = new DataSet();
    //從XML取得Menu清單
    ds.ReadXml("menu.xml");

    this.CreateMenu(this.menuStrip1, new ToolStripMenuItem(), ds.Tables["t_menu_info"]);
}

/// <summary>
/// 建立MenuItem
/// </summary>
/// <param name="menuStrip">MenuStrip名稱</param>
/// <param name="fatherItem">父Item</param>
/// <param name="dt">資料來源</param>
void CreateMenu(MenuStrip menuStrip, ToolStripMenuItem fatherItem, DataTable dt)
{
    //取得父階層編號
    string fatherID;
    if (fatherItem.Text == "")
        fatherID = "-1";
    else
        fatherID = ((DataRow)fatherItem.Tag)["frm_id"].ToString();

    //取得目前階層節點數
    DataRow[] dr = dt.Select("frm_father_id='" + fatherID + "'", "frm_order");
    foreach (DataRow row in dr)
    {
        //給予屬性
        ToolStripMenuItem MenuItem = new ToolStripMenuItem();
        MenuItem.Text = row["frm_cname"].ToString();
        MenuItem.Tag = row;

        //判斷是否為父層
        if (row["frm_father_id"].ToString() == "-1")
            //是>加入menuStrip
            menuStrip.Items.Add((ToolStripItem)MenuItem);
        else
            //否>加入父MenuItem
            fatherItem.DropDownItems.Add((ToolStripItem)MenuItem);


        //遞迴 判斷是否有子MenuItem
        this.CreateMenu(menuStrip, MenuItem, dt);


        //判斷是否有Click事件
        if (row["frm_Path"].ToString() != "")
            //註冊Click事件
            MenuItem.Click += new EventHandler(MenuClicked);                
    }
}

#region 註冊Menu_Click
void MenuClicked(object sender, EventArgs e)
{
    ToolStripMenuItem mi = sender as ToolStripMenuItem;

    //如果有子項目就不產生click
    if (mi.HasDropDownItems)
        return;

    DataRow dr = mi.Tag as DataRow;
    //要用反射取得Form
    Assembly frmMain = Assembly.GetEntryAssembly();
    Type MyType = frmMain.GetType(dr["frm_Path"].ToString());

    //實際建立Form
    Form MDIChild = (Form)Activator.CreateInstance(MyType);
    MDIChild.MdiParent = this;
    MDIChild.Show();
}
#endregion