两个Form之间用构造函数回传数值【两个Form窗体不关闭情况下】

本文介绍了一种使用委托实现C#窗体间数据传递的方法。通过Form1实例化Form2并传递字符串参数，Form2触发事件回调给Form1更新界面。

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Form1代码如下:

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 窗体间传递数值
{
public partial class Form1 : Form
{
//
public string text = null;
//
public Form1()
{
InitializeComponent();
}
void form2_MyEvent(string text)
{
textBox1.Text = text;
}
private void button1_Click(object sender, EventArgs e)
{
text = textBox1.Text;
Form2 form2 = new Form2(text);
form2.MyEvent += new MyDelegate(form2_MyEvent);
form2.Show();
}
}
}

Form2代码:

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 窗体间传递数值
{
public delegate void MyDelegate(string text);

public partial class Form2 : Form
{

public event MyDelegate MyEvent;

public Form2(string text)
{
InitializeComponent();
this.textBox1.Text = text;
}
private void button1_Click(object sender, EventArgs e)
{
MyEvent(this.textBox1.Text);

}
}
}