C# winform间窗体传值简单Demo

form1是用来接收值的

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 DelegateEventDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Form2 f2 = new Form2();
        private void Form1_Load(object sender, EventArgs e)
        {
            this.Text = "接收值";            
            f2.DelegateEvent += new Form2.DelegateMessage(GetText);
        }
        private void GetText(string msg)
        {
            this.textBox1.Text = msg;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            f2.Show();
        }
    }
}

form2是发送值的

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 DelegateEventDemo
{   
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();           
        }

        public delegate void DelegateMessage(string txt);//声明一个委托
        public event DelegateMessage DelegateEvent;//声明委事件

     
        private void Form2_Load(object sender, EventArgs e)
        {
            this.Text = "传值窗体";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DelegateEvent(this.textBox1.Text);               
        }      
    }
}

1.委托是把方法当做参数一样使用

a）委托（int a,int b）

    方法（int a,int b）

   {

　　　　return a+b；

    }

　　委托  委托对象=new 委托（方法名）；

　　int sum=委托对象(5,3);

　　结果 sum=8;