C# 自定义事件的使用

//子窗体 
#region 自定义事件
        /*定义事件参数类*/
        public class clickButtonEventArgs : EventArgs
        {
            public readonly string KeyToRaiseEvent;
            public clickButtonEventArgs(string keyToRaiseEvent)
            {
                KeyToRaiseEvent = keyToRaiseEvent;
            }
        }
        /*定义委托声明*/
        public delegate void clickButtonEventHandler(object sender, clickButtonEventArgs e);
        //用event关键字声明事件对象
        public event clickButtonEventHandler clickUerEvent;
        //事件触发方法
        protected virtual void onClickButtonEvent(clickButtonEventArgs e)
        {
            if (clickUerEvent != null)
            {
                clickUerEvent(this, e);
            }
        }
        //引发事件
        private void RaiseEvent(string keyToRaiseEvent)
        {
            clickButtonEventArgs e = new clickButtonEventArgs(keyToRaiseEvent);
            onClickButtonEvent(e);
        }
        #endregion
       // 主窗体：
         #region 订阅自定义控件被点击的自定义事件
        /// <summary>
        /// 订阅事件
        /// </summary>
        /// <param name="evenSoure"></param>
        public void Subscribe(UserBaseNullDeviceInfo evenSource)
        {
            evenSource.clickUerEvent += EvenSource_clickUerEvent;
        }
        /// <summary>
        /// 取消订阅事件
        /// </summary>
        /// <param name="evenSoure"></param>
        public void UnSubscribe(UserBaseNullDeviceInfo evenSource)
        {
            evenSource.clickUerEvent  -= EvenSource_clickUerEvent;
        }
        /// <summary>
        /// 事件方法：自定义控件panel_in被点击 响应事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void EvenSource_clickUerEvent(object sender, UserBaseNullDeviceInfo.clickUerBaseNullEventArgs e)
        {
            string str = e.KeyToRaiseEvent; //获取当前点击的自定义控件的label_Number
            showControl();
            foreach (UserBaseNullDeviceInfo item in flowLayoutPanel_DeviceConfig.Controls)
            {
                if (item.m_strDevNumber == str) //遍历流控件中的与产生自定义事件的自定义用户控件比对编号，相同则进入自定义控件的方法中执行颜色变更操作
                {
                    item.m_selectColor = Color.DodgerBlue;
                    bool pstate = true;
                    item.panel_Set(pstate);
                    gvValue(item);
                }
                else  //不同则还原未未选中状态的颜色
                {
                    item.m_unselectColor = Color.FromArgb(166, 209, 245);
                    bool pstate = false;
                    item.panel_Set(pstate);
                }
            }
        }
//new实例的时候，开始订阅
        #endregion

MainForm:
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 Saker_Albert_HomeTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public void SubEvent(Register eventSource)
        {
            eventSource.clickUerEvent += EventSource_clickUerEvent;
        }

        private void EventSource_clickUerEvent(object sender, Register.clickUerBaseNullEventArgs e)
        {
            label_show.Text = e.KeyToRaiseEvent;
            flowLayoutPanel1.Controls.Add(label_show);
        }

        private void button_Register_Click(object sender, EventArgs e)
        {
            Register register = new Register();
            SubEvent(register); //必须紧跟创建的实例后面，不然无效，当实例窗口关闭则无效
            register.ShowDialog();

           /* if(register.status)
            {
                TestReg testReg = new TestReg();
                //label_show.Text = register.label;
                //flowLayoutPanel1.Controls.Add(label_show);
                testReg.labeltext = register.label;
                testReg.test();
                flowLayoutPanel1.Controls.Add(testReg);
            }*/
        }
    }
}


字窗体：
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 Saker_Albert_HomeTest
{
    public partial class Register : Form
    {
        public bool status = false;
        public string label;


        #region 自定义事件
        /*定义事件参数类*/
        public class clickUerBaseNullEventArgs : EventArgs
        {
            public readonly string KeyToRaiseEvent;

            public clickUerBaseNullEventArgs(string keyToRaiseEvent)
            {
                KeyToRaiseEvent = keyToRaiseEvent;
            }
        }
        /*定义委托声明*/
        public delegate void clickUserBaseNullEventHandler(object sender, clickUerBaseNullEventArgs e);

        //用event关键字声明事件对象
        public event clickUserBaseNullEventHandler clickUerEvent;

        //事件触发方法
        protected virtual void onClickUserBaseNullEvent(clickUerBaseNullEventArgs e)
        {
            if (clickUerEvent != null)
            {
                clickUerEvent(this, e);
            }
        }

        //引发事件
        private void RaiseEvent(string keyToRaiseEvent)
        {
            clickUerBaseNullEventArgs e = new clickUerBaseNullEventArgs(keyToRaiseEvent);

            onClickUserBaseNullEvent(e);
        }

        #endregion



        public Register()
        {
            InitializeComponent();
        }

        private void button_OK_Click(object sender, EventArgs e)
        {
            status = true;
            label = label_Reg.Text;
            RaiseEvent(label);
            this.Close();

        }
    }
}