C# winform间窗体传值简单Demo

form1是用来接收值的

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Threading.Tasks;
 9 using System.Windows.Forms;
10 
11 namespace DelegateEventDemo
12 {
13     public partial class Form1 : Form
14     {
15         public Form1()
16         {
17             InitializeComponent();
18         }
19         Form2 f2 = new Form2();
20         private void Form1_Load(object sender, EventArgs e)
21         {
22             this.Text = "接收值";            
23             f2.DelegateEvent += new Form2.DelegateMessage(GetText);
24         }
25         private void GetText(string msg)
26         {
27             this.textBox1.Text = msg;
28         }
29 
30         private void button1_Click(object sender, EventArgs e)
31         {
32             f2.Show();
33         }
34     }
35 }

Form1代码

form2是发送值的

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Threading.Tasks;
 9 using System.Windows.Forms;
10 
11 namespace DelegateEventDemo
12 {   
13     public partial class Form2 : Form
14     {
15         public Form2()
16         {
17             InitializeComponent();           
18         }
19 
20         public delegate void DelegateMessage(string txt);//声明一个委托
21         public event DelegateMessage DelegateEvent;//声明委事件
22 
23      
24         private void Form2_Load(object sender, EventArgs e)
25         {
26             this.Text = "传值窗体";
27         }
28 
29         private void button1_Click(object sender, EventArgs e)
30         {
31             DelegateEvent(this.textBox1.Text);               
32         }      
33     }
34 }

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;