为什么UserStackFrame为null并且我必须设置它？ [英] Why UserStackFrame is null and do I have to set up it?

问题描述

我正在使用NLOG记录信息。有一个属性 UserStackFrame 。



我使用了代码。

I am using NLOG to log the information. There is a property UserStackFrame.

I used the code.

protected override void Write(LogEventInfo loggingEvent)
        {
            try
            {
                var renderedEvent = Layout.Render(loggingEvent);
                var messageBuilder = new GelfMessageBuilder(renderedEvent, HostName, loggingEvent.TimeStamp, ToGelf(loggingEvent.Level))
                    .SetAdditionalField(GelfAdditionalFields.Facility, Facility)
                    .SetAdditionalField(GelfAdditionalFields.LoggerName, loggingEvent.LoggerName);
                if (IncludeSource)
                {
                    var userStackFrame = loggingEvent.UserStackFrame;
                    if (userStackFrame != null)
                    {
                        messageBuilder.SetAdditionalField(GelfAdditionalFields.SourceFileName, userStackFrame.GetFileName());
                        messageBuilder.SetAdditionalField(GelfAdditionalFields.SourceLineNumber, userStackFrame.GetFileLineNumber().ToString(CultureInfo.InvariantCulture));
                    }
                }

但 userStackFrame 为空。我不知道为什么我应该设置它？



如果是这样，怎么样？

谢谢。

But userStackFrame is null. I don't know why and should I need to set up it?

If so, how?
Thanks.

推荐答案

您好，



在这种情况下，根据LogEventInfo文档：



UserStackFrame获取执行日志记录的方法的堆栈帧。



您需要使用 setStackTrace LogEventInfo类的方法。并且只是为了确保在 userStackFrame 上进行验证后，您可以使用 HasStackTrace 方法来检查一切是否正确只是一个建议。

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代码：

Hello,

In this case and as per LogEventInfo documentation:

UserStackFrame get the stack frame of the method that did the logging.

You need to set the Stack Trace using setStackTrace method of the LogEventInfo class. And just to be sure maybe after do the validation on userStackFrame you can use HasStackTrace method to check that everything is correct just a suggestion.


Code:

protected override void Write(LogEventInfo loggingEvent)
        {
            try
            {
                var renderedEvent = Layout.Render(loggingEvent);
                var stack = new StackTrace();
                int userFrameIndex = stack.FrameCount;

                loggingEvent.setStackTrace(stack,userFrameIndex);

                var messageBuilder = new GelfMessageBuilder(renderedEvent, HostName, loggingEvent.TimeStamp, ToGelf(loggingEvent.Level))
                    .SetAdditionalField(GelfAdditionalFields.Facility, Facility)
                    .SetAdditionalField(GelfAdditionalFields.LoggerName, loggingEvent.LoggerName);
                if (IncludeSource)
                {
                    if(loggingEvent.HasStackTrace)
                    {
                      var userStackFrame = loggingEvent.UserStackFrame;
                    }

                    if (userStackFrame != null)
                    {
                        messageBuilder.SetAdditionalField(GelfAdditionalFields.SourceFileName, userStackFrame.GetFileName());
                        messageBuilder.SetAdditionalField(GelfAdditionalFields.SourceLineNumber, userStackFrame.GetFileLineNumber().ToString(CultureInfo.InvariantCulture));
                    }
                }

我希望这可以帮到你。



最好的问候！

I hope this can help you.

Best Regards!

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