C# 通过委托,事件窗口传值
Form2
namespace WindowsFormsApp1
{
//定义委托
public delegate void Sum(int x, int y);
public partial class Form2 : Form
{
//定义事件
public event Sum sum;
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
int x = Convert.ToInt32(textBox1.Text);
int y = Convert.ToInt32(textBox2.Text);
sum(x, y);
}
}
}
Form1
namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Form2 form2 = new Form2();
//注册事件
form2.sum += sum;
form2.ShowDialog();
}
//计算
public void sum(int x ,int y)
{
textBox1.Text = (x + y).ToString();
}
}
}
效果
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