c# - 动态控制的事件处理程序的工作

Answer 1

I would suggest detecting what causes the PostBack in Page_Load Event On postback, how can I check which control cause postback in Page_Init event and then

 if (Page.IsPostBack && *PostBackControl.Name=="btnAdd"*)
            {
if (DateTime.Now.Second < 30)
        {
                LinkButton lnk1 = new LinkButton();
                lnk1.ID = "D1";
                lnk1.Text = "A";
                //Event handler must be registered in the Page_Load/Page_Init
                lnk1.Click += new EventHandler(LinkButton_Click);
                plhDynamicLinks.Controls.Add(lnk1);

                LinkButton lnk2 = new LinkButton();
                lnk2.ID = "D2";
                lnk2.Text = "B";
                lnk2.Click += new EventHandler(LinkButton_Click);
                plhDynamicLinks.Controls.Add(lnk2);
    } else
        {
                LinkButton lnk3 = new LinkButton();
                lnk3.ID = "D3";
                lnk3.Text = "C";
                lnk3.Click += new EventHandler(LinkButton_Click);
                plhDynamicLinks.Controls.Add(lnk3);

                LinkButton lnk4 = new LinkButton();
                lnk4.ID = "D4";
                lnk4.Text = "D";
                lnk4.Click += new EventHandler(LinkButton_Click);
                plhDynamicLinks.Controls.Add(lnk4);
    }
            }
        }