用事件,委托做A窗体关闭B窗体刷新

A窗体

//用委托声明(传一个当前窗体的页面)
public delegate void Determine(AddOperationRulesForm frm);

//用event 关键字声明事件对象
 public event Determine DetermineClick;

//在页面做完事，需要关闭窗体是调用

DetermineClick(this);

B窗体

//调用A窗体时

var form = new AddOperationRulesForm(_buildingSysNo);
            form.DetermineClick+=form_DetermineClick;  //调用事件
            form.Show();

private void form_DetermineClick(AddOperationRulesForm frm)
        {
            frm.Close();
            BindingDataSources();
        }