ATJ_MES_581/Comprosser/FrmPrint/Login.cs

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 FrmPrint
{
    public partial class Login : Form
    {
        public delegate void SetTextValue();
        public event SetTextValue SetFormTextValue;
        Form1 f1;
        public delegate void ChangeTextHandler(string str);  //定义委托
        public event ChangeTextHandler ChangeText;  //定义事件
        public Login()
        {
            InitializeComponent();
            
        }
        public Login(Form1 f1) : this()
        {
            this.f1 = f1;
            if (f1.UserName == "用户名")
            {
                textBox2.Text = "";
            }
            else
            {
                textBox2.Text = f1.UserName;
            }
        }

        private void Login_Load(object sender, EventArgs e)
        {
            button1.Text = "确认";
            button2.Text = "注销";
        }

        private void button2_Click(object sender, EventArgs e)
        {
            ChangeText("用户名");//执行委托实例  

            MessageBox.Show("注销成功");
            this.Close();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            if (textBox1.Text == "123456")
            {
                if (ChangeText != null)//判断事件是否为空
                {
                    ChangeText("管理员");//执行委托实例  
                }
                this.Close();
            }
            else
            {
                MessageBox.Show("请输入管理员密码!");
            }
        }
    }
}