Panel内嵌入子窗体

using System;
using System.Windows.Forms;

namespace Panel内嵌入子窗体
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// 

        /// 嵌入窗体通用方法
        /// 
        /// 
        private void OpenSubFrm(Form subForm)
        {
            //首先关闭Panel内的所有form控件
            foreach (Control item in this.panel1.Controls)
            {
                if (item is Form)
                {
                    ((Form)item).Close();
                }
            }
            subForm.TopLevel = false;//将子窗体设置为非顶级控件
            subForm.Parent = this.panel1;//将Panel1设置为子窗体的父容器
            subForm.FormBorderStyle = FormBorderStyle.None;//将子窗体的边框样式设置为无
            subForm.Dock = DockStyle.Fill;//子窗体的dock属性设置为填充
            subForm.Show();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OpenSubFrm(new Form2());
        }

        private void button2_Click(object sender, EventArgs e)
        {
            OpenSubFrm(new Form3());
        }
    }
}