用事件注册实现窗口之间传值
事件和数据定义:
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace WindowsApplication1
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{
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public class MyEventArgs : EventArgs
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{
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private string _eventTag;
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public MyEventArgs(string eventTag)
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{
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this._eventTag = eventTag;
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}
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public string EventTag
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{
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get
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{
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return this._eventTag;
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}
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}
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}
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public class MyData
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{
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public delegate void DataChanged(object sender, MyEventArgs e);
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public event DataChanged DataChangedEvent;
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private string _data;
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public MyData(string data)
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{
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this._data = data;
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}
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public string Data
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{
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get
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{
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return this._data;
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}
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set
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{
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this._data = value;
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if (this.DataChangedEvent != null)
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{
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MyEventArgs myeventArags = new MyEventArgs(this._data);
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DataChangedEvent(this, myeventArags);
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}
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}
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}
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}
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}
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父窗体MainForm代码如下:
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Text;
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using System.Windows.Forms;
8![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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namespace WindowsApplication1
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{
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public partial class MainForm : Form
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{
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private MyData _data = new MyData("Init value");
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public MainForm()
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{
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InitializeComponent();
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_data.DataChangedEvent += new MyData.DataChanged(_data_DataChangedEvent);
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SForm1 f1 = new SForm1();
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SForm2 f2 = new SForm2();
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f1.Data = _data;
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f2.Data = _data;
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f1.Show();
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f2.Show();
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}
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void _data_DataChangedEvent(object sender, MyEventArgs e)
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{
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this.textBox1.Text = e.EventTag;
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}
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private void button1_Click(object sender, EventArgs e)
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{
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this._data.Data = this.textBox1.Text;
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}
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}
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}
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子窗体SForm1代码(SForm2的代码和SForm1的代码相同):
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Text;
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using System.Windows.Forms;
8![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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namespace WindowsApplication1
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{
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public partial class SForm1 : Form
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{
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private MyData _data;
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public SForm1()
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{
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InitializeComponent();
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}
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void _data_DataChangedEvent(object sender, MyEventArgs e)
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{
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this.textBox1.Text = e.EventTag;
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}
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public MyData Data
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{
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set
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{
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this._data = value;
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this._data.DataChangedEvent += new MyData.DataChanged(_data_DataChangedEvent);
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}
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}
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private void button1_Click(object sender, EventArgs e)
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{
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this._data.Data = this.textBox1.Text;
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}
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}
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}
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