logging - 语义记录 : An item with the same key has already been added

Question

我正在尝试使用新的语义应用程序块进行日志记录。根据 MSDN，我有使用测试方法检查 EventSource

EventSourceAnalyzer.InspectAll(MyEventSource.Log);

但是当我运行这个测试时，我收到了错误

An item with the same key has already been added 

如果我们使用相同的事件 ID，通常我们会得到这个错误，但我对每种方法使用不同的 EventID。下面是我的事件源类

EventSource(Name = "SLAB_1.1.1403.1")]
public class MyEventSource : EventSource
{
    public class Keywords
    {
        public const EventKeywords Page = (EventKeywords)1;
        public const EventKeywords DataBase = (EventKeywords)2;
        public const EventKeywords Diagnostic = (EventKeywords)4;
        public const EventKeywords Perf = (EventKeywords)8;
    }

    public class Tasks
    {
        public const EventTask Page = (EventTask)1;
        public const EventTask DBQuery = (EventTask)2;
    }

    private static MyEventSource _log = new MyEventSource();
    private MyEventSource() { }
    public static MyEventSource Log { get { return _log; } }

    [Event(1, Message = "Application Failure: {0}",
    Level = EventLevel.Critical, Keywords = Keywords.Diagnostic)]
    internal void Failure(string message)
    {
        if (this.IsEnabled(EventLevel.Critical, Keywords.Diagnostic))
        {
            this.WriteEvent(1, message);
        }
    }

    [Event(2, Message = "Application Failure1: {0}",
    Level = EventLevel.Critical, Keywords = Keywords.Diagnostic)]
    internal void Failure(string message, string exception)
    {
        if (this.IsEnabled(EventLevel.Critical, Keywords.Diagnostic))
        {
            this.WriteEvent(2, message, exception);
        }
    }

    [NonEvent]
    internal void Failure(string message, Exception ex)
    {
        if (this.IsEnabled(EventLevel.Critical, Keywords.Diagnostic))
        {
            Failure(message, ex.ToString());
        }
    }
}

Answer 1

方法名称是键，因此由于您有两个名为 Failure 的方法，即使您有不同的参数列表，SLAB 基础结构也会将方法名称作为键添加到字典中。将您的其中一种故障方法重命名为 Failure2 或类似名称以解决此问题。