using System;
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 Winform_EvnetTest
{
public partial class Form1 : Form
{
// 1.自定义事件
public class TextChangeEventArgs : EventArgs
{
private string message;
public TextChangeEventArgs(string message)
{
this.message = message;
}
public string Message
{
get { return message; }
}
}
//2.1 定义委托
public delegate void TextBoxChangedHandle(object sender, TextChangeEventArgs e);
//2.2 定义事件
public event TextBoxChangedHandle UserControlValueChanged;
//2.3
private void textBox1_TextChanged(object sender, System.EventArgs e)
{
if (UserControlValueChanged != null)
UserControlValueChanged(this, new TextChangeEventArgs(this.textBox1.Text));
MessageBox.Show(this.textBox1.Text);
}
public Form1()
{
InitializeComponent();
//3.注册事件
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
}
}
}
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