如何以编程方式获取当前的跟踪开关? [英] How can I get the current Trace Switch programatically?

问题描述

在我的 web.config 中，我有:

<system.diagnostics>
  <switches>
    <add name="logLevelSwitch" value="1" />
  </switches>
</system.diagnostics>

有没有一种我可以打电话的方式，例如:

Is there a way that I could call, for example:

System.Diagnostics.TraceSwitch ["logLevelSwitch"] 以获取当前值?

推荐答案

一旦您在 web.config 文件中定义了switch值，就很容易通过创建从应用程序中获取此值 TraceSwitch :

Once you've defined the switch value in your web.config file, it's easy to get this value from your application by creating a TraceSwitch with the same name:

private static TraceSwitch logSwitch = new TraceSwitch("logLevelSwitch",
    "This is your logLevelSwitch in the config file");

public static void Main(string[] args)
{
    // you can get its properties value then:
    Console.WriteLine("Trace switch {0} is configured as {1}",
        logSwitch.DisplayName,
        logSwitch.Level.ToString());

    // and you can use it like this:
    if (logSwitch.TraceError)
        Trace.WriteLine("This is an error");

    // or like this also:
    Trace.WriteLineIf(logSwitch.TraceWarning, "This is a warning");
}

此外，根据文档，此方法可以正常工作

Moreover, for this to work, according to the documentation:

必须启用跟踪或调试才能使用开关.以下语法是特定于编译器的.如果您使用的不是C#或Visual Basic，请参阅您的编译器的文档.

You must enable tracing or debugging to use a switch. The following syntax is compiler specific. If you use compilers other than C# or Visual Basic, refer to the documentation for your compiler.

要启用C#中的调试功能，请在编译器命令行中添加/d:DEBUG 标志编译代码时，也可以在 #define DEBUG 的顶部添加您的文件.在Visual Basic中，将/d:DEBUG = True 标志添加到编译器命令行.

To enabledebugging in C#, add the /d:DEBUG flag to the compiler command line when you compile your code, or you can add #define DEBUG to the top of your file. In Visual Basic, add the /d:DEBUG=True flag to the compiler command line.

要在C#中启用使用跟踪，请将/d:TRACE 标志添加到编译代码或在文件顶部添加 #define TRACE 时使用编译器命令行.在Visual Basic中，添加/d:TRACE = True 标记到编译器命令行.

To enable tracing using in C#, add the /d:TRACE flag to the compiler command line when you compile your code, or add #define TRACE to the top of your file. In Visual Basic, add the /d:TRACE=True flag to the compiler command line.

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