C#—多重窗体

（1）窗体的创建、显示、关闭；

（2）使用静态变量实现窗体间传递数据。

Form1：

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

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
Form frmTest;           //声明窗体对象
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
frmTest = new Form();         //实例化窗体对象frmTest
frmTest.Show();             //以非模式方式显示窗体
}

private void button2_Click(object sender, EventArgs e)
{
frmTest.Dispose();        //释放窗体对象
}

private void button4_Click(object sender, EventArgs e)
{
this.label1.Text = Form2.strTxt;
}

private void button3_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2();
f2.ShowDialog();
}
}
}

Form2：

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

namespace WindowsFormsApplication2
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
public static string strTxt; //通过类的公共静态成员传递数据

private void Form2_Load(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
strTxt = this.textBox1.Text;
this.Dispose();
}
}
}


运行结果：