MDI窗体设计

开始时设置父窗体IsMdiContainer为true,设置一个MenuStrip

using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MDI窗体设计
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void 显示子窗体ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form2 frm2 = new Form2();
frm2.MdiParent = this;
frm2.Show();
Form3 frm3 = new Form3();
frm3.MdiParent = this;
frm3.Show();
Form4 frm4 = new Form4();
frm4.MdiParent = this;
frm4.Show();
}

private void Form1_Load(object sender, EventArgs e)
{
this.IsMdiContainer = true;
}

private void 横向排列ToolStripMenuItem_Click(object sender, EventArgs e)
{
LayoutMdi(MdiLayout.TileVertical);
}

private void 纵向排列ToolStripMenuItem_Click(object sender, EventArgs e)
{
LayoutMdi(MdiLayout.TileHorizontal);
}
}
}