C# Winform选项卡集成窗体详解

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 = { 0,0 };//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] = 1; 
    }

    private void tabControl1_SelectedIndexChanged(object sender,EventArgs e)
    {
      //只生成一次
      if(s[tabControl1.SelectedIndex]==0)
      {
        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);
    }


  }
}