error file control

基本解释

Select the Value is required and Add display error control check boxes on the Validation tab, then save the file.
選取Validation 選項卡中的 Vale is required 和 Add display error control 複選框，然後保存文件。
Source control allows you to "roll back" to a previous iteration of a file to restore the status quo or to recover from an error.
源代碼控制系統允許用戶 “廻滾” 到以前的文件版本，從而恢複以前的狀態或從錯誤中恢複。
The if statement acts as simple error control, exiting our script if it does not find the file with a somewhat graceful error for our users.
if 語句將用作簡單的錯誤控制，如果由於用戶的小失誤而導致它未找到文件，則退出腳本。