If a problem occurs during run time, turn on the appropriate trace switch.
如果在运行时出现问题，请打开相应的跟踪开关。
In that case, you would use one trace switch for the data access module and one switch for the rest of the application.
这种情况下，可以将一个跟踪开关用于数据访问模块，而将另一个开关用于应用程序的其余部分。
Trace and debug Settings specify trace listeners that collect, store, and route messages, and the level where a trace switch is set.
跟踪和调试设置指定对消息进行收集、存储和路由的跟踪侦听器，并且还指定设置跟踪开关的级别。
You configure a trace switch to turn it on and off, or to set its level, determining the amount and type of messages it passes along to listeners.
通过配置跟踪开关，可以将其打开和关闭或设置其级别，以确定它向侦听器传递的消息量及消息类型。
You configure a trace switch to turn it on and off, or to set its level, determining the amount and type of messages it passes along to listeners.
通过配置跟踪开关，可以将其打开和关闭或设置其级别，以确定它向侦听器传递的消息量及消息类型。
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