Message in Chinese (Simplified) (中文(简体))
服务器上发生未处理异常时要发送到客户端的错误消息。可以在页面标记中或在 ScriptManager 的 AsyncPostBackError 事件过程中以声明方式设置该属性。如果值为空，则将使用异常的消息。
Unlocalized message
The error message to be sent to the client when an unhandled exception occurs on the server. The property can be set declaratively in the page markup or during the ScriptManager's AsyncPostBackError event. If the value is empty the exception's message will be used.
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