散步在海洋中的碼農

//寫法為擴充方法

  public static T FindMasterPageControl<T>(this Control co, string ContentPlaceHolder, string controlID)
        {


            Page page = HttpContext.Current.Handler as Page;

            Control c = page.Master.FindControl(ContentPlaceHolder).FindControl(controlID);
            if (c == null)
                throw new Exception("找不到 id=" + controlID + " 的控制項");

            try
            {
                T rtn = (T)Convert.ChangeType(c, typeof(T));
                return rtn;
            }
            catch (InvalidCastException e1)
            {
                throw new Exception("id-" + controlID + " 的控制項存在, 但無法轉型成指定型別" + e1.Message);
            }
            catch (Exception e2)
            {
                throw e2;
            }
        }

 

以上文章僅用紀錄資料使用.....