EventAttribute.Message 属性

定义

命名空间:

System.Diagnostics.Tracing

程序集:

System.Diagnostics.Tracing.dll

Source:

EventSource.cs

获取或设置事件的消息。

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

属性值

String

事件的消息。

示例

以下示例演示如何使用 Message 属性指定事件消息。 此代码示例是为 EventSource 类提供的一个更大示例的一部分。

[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

注解

例如， {1} 可以使用标准.NET Framework替换运算符 (字符串) 中的) 。 它们将被替换为事件有效负载相应部分的字符串表示形式。

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