winform利用委托事件获取主窗体的值

这个用起来很爽，通常在不知道主窗体是谁，但是要做成 子窗体可以随时获取主窗体的值，如下：

 

 

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 窗体传值
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 F = new Form2();
            F.ABC += QQQ;//绑定（中介）事件
            F.Show();
        }
        int chuanhui = 123;
        void QQQ(string B, ref int AA)
        {
            AA = chuanhui;//返回子窗体的值
        }

       
            
    }
}

 

 

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 窗体传值
{
    public partial class Form2 : Form
    {
        public delegate  void D1(string A,ref int B);
        public event D1 ABC;
        public Form2()
        {
            InitializeComponent();
        }
        int BB;
        private void button1_Click(object sender, EventArgs e)
        {
            ABC("111", ref BB);//执行（中介）事件
        }

        private void button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show(BB.ToString());//获取主窗体的值
        }
    }
}

 方法2 利用泛型委托

窗体1

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 窗体传值Action
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 F = new Form2();
            F.ABC += QQQ;//绑定（中介）事件
            F.Show();
        }
        int chuanhui = 123;
        int QQQ(string B )
        {
            return chuanhui;//返回子窗体的值
        }
    }
}

窗体2

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 窗体传值Action
{
    public partial class Form2 : Form
    {
       
        public event Func<string, int> ABC;
      
        public Form2()
        {
            InitializeComponent();
        }
        int BB;
        private void button1_Click(object sender, EventArgs e)
        {
            BB= ABC("111");//执行（中介）事件
        }

        private void button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show(BB.ToString());//获取主窗体的值
        }
    }
}

 

 

 

 

 

 

2.winform窗体控件线程安全做法

BeginInvoke(new Action(() =>
{
lab_message.Text = message;
}));

或者

Invoke(new Action(() =>
{
labeltime.Text = "123";
}));