如何界定app.config中自定义的TraceListener [英] How to define custom TraceListener in app.config

问题描述

我实现了一个自定义跟踪监听器（从 TextWriteTraceListener 导出），现在我想设置我的应用程序来使用它，而不是标准的 TextWriteTraceListener 。

I have implemented a custom trace listener (derived from TextWriteTraceListener) and now I would like to set my application to use it instead of standard TextWriteTraceListener.

首先，我增加了默认的 TextWriteTraceListener ，以确保它的工作原理确定，它的作用。这是我的app.config：

First I added default TextWriteTraceListener in order to make sure it works ok and it does. Here's my app.config:

<configuration>
    <system.diagnostics>
        <trace autoflush="true" indentsize="4">
            <listeners>
                <add name="TextListener"  type="System.Diagnostics.TextWriterTraceListener" initializeData="trace.log" />
            <remove name="Default" />
            </listeners>
        </trace>
    </system.diagnostics>
</configuration>

现在我的跟踪监听器被定义在 MyApp.Utils 命名空间，这就是所谓的 FormattedTextWriterTraceListener 。所以我改变了上面的配置类型为 MyApp.Utils.FormattedTextWriterTraceListener 和它目前看起来像这样：

Now my trace listener is defined in MyApp.Utils namespace and it's called FormattedTextWriterTraceListener. So I changed the type in the config above to MyApp.Utils.FormattedTextWriterTraceListener and it currently looks like that:

<configuration>
    <system.diagnostics>
        <trace autoflush="true" indentsize="4">
            <listeners>
                <add name="MyTextListener" type="MyApp.Utils.FormattedTextWriterTraceListener" initializeData="trace.log" />
            <remove name="Default" />
            </listeners>
        </trace>
    </system.diagnostics>
</configuration>

但是现在，当我尝试登录的东西，我得到一个 ConfigurationErrorsException 与消息：

找不到类型类MyApp.Utils.FormattedTextWriterTraceListener。

Couldn't find type for class MyApp.Utils.FormattedTextWriterTraceListener.

有谁知道我怎么能在配置设置这个自定义的监听器，如果它甚至有可能？

Does anyone knows how can I set up this custom listener in config and if it's even possible?

推荐答案

尝试指定的程序集太，像这样：

Try specifying an assembly too, like so:

<configuration>
    <system.diagnostics>
        <trace autoflush="true" indentsize="4">
            <listeners>
                <add name="TextListener" 
                    type="MyApp.Utils.FormattedTextWriterTraceListener, MyApp"
                    initializeData="trace.log" />
            <remove name="Default" />
            </listeners>
        </trace>
    </system.diagnostics>
</configuration>

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