Message in Chinese (Simplified) (中文(简体))

在验证发生前无法调用 Page.IsValid。应在控件的事件处理程序中使用 CausesValidation=True 或在调用 Page.Validate 后对它进行查询。

Unlocalized message

Page.IsValid cannot be called before validation has taken place. It should be queried in the event handler for a control that has CausesValidation=True and initiated the postback, or after a call to Page.Validate.

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