子窗体委托:
public partial class Form_settings : Form
{
public delegate void DataChangeHandler(Object sender, EventArgs e);
public event DataChangeHandler ReturnEvent;
public Form_settings()
{
InitializeComponent();
}
}
子窗体调用
ReturnEvent(null,null);
主窗体:
public MainFrom()
{
Form_settings CF = new Form_settings();
CF.ReturnEvent += new Form_settings.DataChangeHandler(On_request);
InitializeComponent();
}
private void On_request(object sender,EventArgs e)
{
this.defaultLabel2.Text = AllVariable.XDBL.ToString() + "箱每跺";
}
报错