EventAttribute.Message 屬性

定義

命名空間:

System.Diagnostics.Tracing

組件:

System.Diagnostics.Tracing.dll

來源:

EventSource.cs

取得或設定事件的訊息。

public:
 property System::String ^ Message { System::String ^ get(); void set(System::String ^ value); };

public string? Message { get; set; }

member this.Message : string with get, set

Public Property Message As String

屬性值

String

事件的訊息。

範例

下列範例示範如何使用 Message 屬性來指定事件訊息。 此程式代碼範例是針對 類別提供的較大範例的 EventSource 一部分。

[Event(1, Message = "Application Failure: {0}", Level = EventLevel.Error, Keywords = Keywords.Diagnostic)]
public void Failure(string message) { WriteEvent(1, message); }

<[Event](1, Message:="Application Failure: {0}", Level:=EventLevel.Error, Keywords:=Keywords.Diagnostic)> _
Public Sub Failure(ByVal message As String)
    WriteEvent(1, message)
End Sub

[Event(2, Message = "Starting up.", Keywords = Keywords.Perf, Level = EventLevel.Informational)]
public void Startup() { WriteEvent(2); }

<[Event](2, Message:="Starting up.", Keywords:=Keywords.Perf, Level:=EventLevel.Informational)> _
Public Sub Startup()
    WriteEvent(2)
End Sub

[Event(3, Message = "loading page {1} activityID={0}", Opcode = EventOpcode.Start,
    Task = Tasks.Page, Keywords = Keywords.Page, Level = EventLevel.Informational)]
public void PageStart(int ID, string url) { if (IsEnabled()) WriteEvent(3, ID, url); }

<[Event](3, Message:="loading page {1} activityID={0}", Opcode:=EventOpcode.Start, Task:=Tasks.Page, Keywords:=Keywords.Page, Level:=EventLevel.Informational)> _
Public Sub PageStart(ByVal ID As Integer, ByVal url As String)
    If IsEnabled() Then
        WriteEvent(3, ID, url)
    End If
End Sub

備註

例如) ， {1} 您可以在字串) 中使用標準 .NET Framework 替代運算子 (。 它們會取代為事件承載對應部分的字串表示。

[Event(1, Message = "Application Failure: {0}", Level = EventLevel.Error, Keywords = Keywords.Diagnostic)]  
        public void Failure(string message) { WriteEvent(1, message); }