父窗体:Form1
子窗体:Form2
点击Form1,弹出Form2,点击按钮返回值给Form1
首先在Form2中定义委托和事件:
//声明委托 和 事件
public delegate void TransfDelegate(String value);
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
public event TransfDelegate TransfEvent;
private void button1_Click(object sender, EventArgs e)
{
//触发事件
TransfEvent(textBox1.Text);
this.Close();
}
}
然后在Form1中进行调用:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Form2 frm = new Form2();
//注册事件
frm.TransfEvent += frm_TransfEvent;
frm.ShowDialog();
}
//事件处理方法
void frm_TransfEvent(string value)
{
textBox1.Text = value;
}
}