.NET Core 获取 SkyWalking 当前的 TraceId

注意

2019-6-26 追记：新版本中已经找不到 GlobalTraceId 属性了。

安装 SkyWalking.Agent.AspNetCore 包
当前最新版本是 0.6.0。
batch
```
Install-Package SkyWalking.Agent.AspNetCore
```
1

通过 ContextManager 中的 GlobalTraceId 获取当前的 TraceId

csharp

/// <summary>
/// Trace Id
/// </summary>
public string TraceId { get; set; } = SkyWalking.Context.ContextManager.GlobalTraceId;

GlobalTraceId 属性的源码

csharp

namespace SkyWalking.Context
{
    /// <summary>
    /// Context manager controls the whole context of tracing. Since .NET server application runs as same as Java,
    /// We also provide the CONTEXT propagation based on ThreadLocal mechanism.
    /// Meaning, each segment also related to singe thread.
    /// </summary>
    public class ContextManager : ITracingContextListener, IIgnoreTracerContextListener
    {
        static ContextManager()
        {
            var manager = new ContextManager();
            TracingContext.ListenerManager.Add(manager);
            IgnoredTracerContext.ListenerManager.Add(manager);
        }

        private static readonly AsyncLocal<ITracerContext> _context = new AsyncLocal<ITracerContext>();

        public static string GlobalTraceId
        {
            get
            {
                if (_context.Value != null)
                {
                    return _context.Value.GetReadableGlobalTraceId();
                }

                return "N/A";
            }
        }
    }
}

.NET Core 获取 SkyWalking 当前的 TraceId ​

.NET Core 获取 SkyWalking 当前的 TraceId