using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Reflection;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace MDITest

{

    public partial class MainForm : Form

    {

        public MainForm()

        {

            InitializeComponent();

        }

        public int[] s = { , ,  };//用来记录窗体是否打开过

        private void MainForm_Load(object sender, EventArgs e)

        {

            //默认加载CNC窗体

            string formClass = "MDITest.CNC";

            GenerateForm(formClass, tabControl1);

        }

        public void GenerateForm(string form,object sender)

        {

            //反射生成窗体

            Form fm = (Form)Assembly.GetExecutingAssembly().CreateInstance(form);

            //设置窗体没有边框，加入到选项卡中

            fm.FormBorderStyle = FormBorderStyle.None;

            fm.TopLevel = false;

            fm.Parent = ((TabControl)sender).SelectedTab;

            fm.ControlBox = false;

            fm.Dock = DockStyle.Fill;

            fm.Show();

            s[((TabControl)sender).SelectedIndex] = ;

        }

        private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)

        {

            //只生成一次

            if(s[tabControl1.SelectedIndex]==)

            {

                btn_Click(sender,e);

            }

        }

         /// <summary>

        /// 通用按钮点击选项卡 在选项卡上显示对应的窗体

        /// </summary>

        private void btn_Click(object sender,EventArgs e)

        {

            string formClass=((TabControl)sender).SelectedTab.Tag.ToString();

            GenerateForm(formClass, sender);

        }

    }

}