EventSource.WriteEventWithRelatedActivityId(Int32, Guid, Object[]) 方法

定义

命名空间:

System.Diagnostics.Tracing

程序集:

System.Diagnostics.Tracing.dll

Source:

EventSource.cs

写入一个指示当前活动与其他活动相关的事件。

protected:
 void WriteEventWithRelatedActivityId(int eventId, Guid relatedActivityId, ... cli::array <System::Object ^> ^ args);

protected void WriteEventWithRelatedActivityId (int eventId, Guid relatedActivityId, params object?[] args);

member this.WriteEventWithRelatedActivityId : int * Guid * obj[] -> unit

Protected Sub WriteEventWithRelatedActivityId (eventId As Integer, relatedActivityId As Guid, ParamArray args As Object())

参数

eventId

Int32

在 EventSource 中唯一标识此事件的标识符。

relatedActivityId

Guid

相关的活动标识符。

args

Object[]

包含与事件相关的数据的对象数组。

示例

下面的代码示例演示如何指定调用 WriteEventWithRelatedActivityId的事件源。

[EventSource(Name = "Litware-ProductName-ComponentName")]
public sealed class LitwareComponentNameEventSource : EventSource
{
    [Event(1, Task = Tasks.Request, Opcode = EventOpcode.Send)]
    public void RequestStart(Guid relatedActivityId, int reqId, string url)
    {
        WriteEventWithRelatedActivityId(1, relatedActivityId, reqId, url);
    }
}

<EventSource(Name:="Litware-ProductName-ComponentName")> _
Public NotInheritable Class LitwareComponentNameEventSource
    Inherits EventSource
    <[Event](1, Task:=Tasks.Request, Opcode:=EventOpcode.Send)> _
    Public Sub RequestStart(relatedActivityId As Guid, reqId As Integer, url As String)
        WriteEventWithRelatedActivityId(1, relatedActivityId, reqId, url)
    End Sub

End Class

[EventSource(Name = "Contoso-ProductName-ComponentName")]
public sealed class CustomizedForPerfEventSource : EventSource
{
    [Event(1, Task = Tasks.Request, Opcode = EventOpcode.Send)]
    public void RequestStart(Guid relatedActivityId, int reqId, string url)
    {
        if (IsEnabled())
            WriteEventWithRelatedActivityId(1, relatedActivityId, reqId, url);
    }

    [NonEvent]
    unsafe protected void WriteEventWithRelatedActivityId(int eventId, Guid relatedActivityId,
                    int arg1, string arg2)
    {
        if (IsEnabled())
        {
            if (arg2 == null) arg2 = string.Empty;
            fixed (char* stringBytes = arg2)
            {
                EventData* descrs = stackalloc EventData[2];
                descrs[0].DataPointer = (IntPtr)(&arg1);
                descrs[0].Size = 4;
                descrs[1].DataPointer = (IntPtr)stringBytes;
                descrs[1].Size = ((arg2.Length + 1) * 2);
                WriteEventWithRelatedActivityIdCore(eventId,
                &relatedActivityId, 2, descrs);
            }
        }
    }

注解

方法 WriteEventWithRelatedActivityId 记录传输事件。 当前线程的活动与 事件一起记录，这允许事件使用者关联两个活动。

调用此函数的 ETW 事件方法必须遵循以下准则：

1. 将第一个 Guid 参数指定为名为 relatedActivityId的 。

2. Send将 或 Receive 指定为 EventAttribute.Opcode 属性。

3. 调用 WriteEventWithRelatedActivityId 传入事件 ID，后跟相关 ID GUID，后跟传递事件方法的所有参数，顺序相同。

如果未 args 使用 ，则会将其转换为空数组，用于对 ETW 的生成调用。