static void Main(string[] args)
{
MyText myText = new MyText();
myText.Changed += new MyText.ChangedEventHandler(myText_Chenged);
string str = string.Empty;
while (str != "exit")
{
Console.Write("请输入一个字符串：");
str = Console.ReadLine();
myText.Text = str;
}
}
private static void myText_Chenged(MyText sender)
{
Console.WriteLine("Text属性的值改变：{0}", sender.Text);
}
public class MyText
{
//定义事件委托
public delegate void ChangedEventHandler(MyText sender);
//定义一个委托类型事件
public event ChangedEventHandler Changed;
//用于触发Changed事件
protected virtual void OnChanged()
{
if (this.Changed != null)
{
this.Changed(this);
}
}
private string _text = string.Empty;
public string Text
{
get { return this._text; }
set
{
this._text = value;
this.OnChanged();
}
}
}
这个例子没看懂，不知道为什么当有textBOX事件时，就会触发。
textBox在文本改变的时候会触发textchanged事件
myText.Changed += new MyText.ChangedEventHandler(myText_Chenged);
这一行挂钩到myText_Chenged