如何在UpdatePanel中使用AutoPostBack

Question

I have two DropDownLists inside an UpdatePanel.

The values shown inside the second are dependent of the selectedValue on the first, so, I need AutoPostBack=true.

But, whenever the selected value in the first DropDownList is changed causes the UpdatePanel reload.

How can this be solved?

PS.: The UpdatePanel's UpdateMode property is set to Conditional.

Thanks.

Answer 1

通过添加Page_Init以仅在首次充电时执行一些规则来解决。