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();
         }
     }
 }

Form1代码

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);
         }
     }
 }

From2代码

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;