带参数的事件

//对事件的理解
//1 事件解决了通过“=”赋值将原来的事件替换的问题
//2 解决了在外部就可以写入方法的问题，疑问事件只能通过“+=或者-=”来赋值

//事件的本质
//1事件最终被编译器解析成一个私有的委托和两个public Add 和 Remove分别用来实现事件的+=和-=.

带参数的事件实例

用户控件代码
namespace 带参数的事件
{
    public delegate void loginDele(object sender,myEvent event1);
    public class myEvent
    {
        public string name
        {
            get;
            set;
        }
        public string pwd
        {
            get;
            set;
        }
        public bool log
        {
            get;
            set;
        }
    }
    public partial class ucLogin : UserControl
    {
        public event loginDele login;
        myEvent event1 = new myEvent();
      
        public ucLogin()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            event1.log = false;
            event1.name = textBox1.Text.Trim();
            event1.pwd = textBox2.Text;

            login(this, event1);
            if (event1.log)
            {
                textBox1.BackColor = Color.Green;
                textBox2.BackColor = Color.Green;
            }
            else
            {
                textBox1.BackColor = Color.Gray;
                textBox2.BackColor = Color.Gray;
            }
        }
    }
}


窗体代码
 private void Form1_Load(object sender, EventArgs e)
        {
            ucLogin1.login += ucLogin1_login;
        }

        void ucLogin1_login(object sender, myEvent event1)
        {
            if (event1.name == "aaa" && event1.pwd == "123")
            {
                event1.log = true;
            }
            else
            {
                event1.log = false;
            }
        }