问题:
A . Add the following marktip to UpdatePanel1. <Triggers> <asp:PostBackTrigger ControlID="btnSave" /> </Triggers>
B . Set the UpdateMode property for the UpdatePanel2 to "Always"
C . Add the following markup to UpdatePanel2 <Triggers> <asp:AsyncPostBackTrigger ControlID="btnSave" EventName="Click" /> </Triggers>
D . Set the UpdateMode property for UpdatePanel2 to "Conditional"
● 参考解析
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