UpdatePanel的使用技巧集锦

1.UpdatePanel内控件的每次postback，都自动刷新UpdatePanel

需借助于它的ChildrenAsTriggers属性，以下摘自http://asp.net/ajax/documentation/
 
By default, the ChildrenAsTriggers property of an UpdatePanel control is true. When this property is set to true, controls inside the panel participate in partial-page updates when any control in the panel causes a postback.

译：默认情况下，一个pdatePanel control 的ChildrenAsTriggers属性是设置为True的。当该属性设置为True时，在UpdaterPanel里任何控件的postback，都引发整个Panel的局部刷新

note

When the UpdateMode property is set to Always and the ChildrenAsTriggers property is set to false, an InvalidOperationException exception is thrown during the OnPreRender(EventArgs) method. This combination of properties is not allowed for the UpdatePanel control.

注意
译：如UpdateMode属性设为Always和ChildrenAsTriggers属性设为False情况下，在预载回调结果时会抛出一个无效操作异常，因为这样的混合属性设置对于UpdaterPanel是不允许的！