TraceContextRecord 类

定义

表示 ASP.NET 跟踪消息和任何关联数据。Represents an ASP.NET trace message and any associated data.

public ref class TraceContextRecord sealed
public sealed class TraceContextRecord
type TraceContextRecord = class
Public NotInheritable Class TraceContextRecord
继承
TraceContextRecord

示例

下面的代码示例演示如何注册 TraceContextEventHandler 委托来处理 TraceFinished 事件。The following code example demonstrates how you can register a TraceContextEventHandler delegate to handle the TraceFinished event. 在此示例中, OnTraceFinished 方法 TraceContextRecord 通过属性访问对象的集合 TraceRecords ,循环访问它们,并将它们写入响应流。In this example, the OnTraceFinished method accesses the collection of TraceContextRecord objects through the TraceRecords property, iterates through them, and writes them to the response stream.

<%@ Page language="c#" Trace="true" %>
<script runat="server">
void Page_Load(object sender, EventArgs e)
{
    // Register a handler for the TraceFinished event.
    Trace.TraceFinished += new 
        TraceContextEventHandler(this.OnTraceFinished);

    // Write a trace message.
    Trace.Write("Web Forms Infrastructure Methods", "USERMESSAGE: Page_Load complete.");
}
 
// A TraceContextEventHandler for the TraceFinished event.
void OnTraceFinished(object sender, TraceContextEventArgs e)
{
    TraceContextRecord r = null;    
    
    // Iterate through the collection of trace records and write 
    // them to the response stream.
    foreach(object o in e.TraceRecords)
    {
        r = (TraceContextRecord)o;
        Response.Write(String.Format("trace message: {0} <BR>", r.Message));
    }
}       
</script>
<%@ Page language="VB" Trace="true" %>
<script runat="server">
' The Page_Load method.
Private Sub Page_Load(sender As Object, e As EventArgs)

    ' Register a handler for the TraceFinished event.
    AddHandler Trace.TraceFinished, AddressOf OnTraceFinished

    ' Write a trace message.
    Trace.Write("Web Forms Infrastructure Methods", "USERMESSAGE: Page_Load complete.")
End Sub ' Page_Load
 
' A TraceContextEventHandler for the TraceFinished event.
Private Sub OnTraceFinished(sender As Object, e As TraceContextEventArgs)

    Dim r As TraceContextRecord
    Dim o As Object
    
    ' Iterate through the collection of trace records and write 
    ' them to the response stream.

    For Each o In e.TraceRecords
        r = CType(o, TraceContextRecord)
        Response.Write(String.Format("trace message: {0} <BR>", r.Message))
    Next

End Sub ' OnTraceFinished
</script>

注解

TraceContextRecord对象封装跟踪消息、类别、任何关联的 Exception ,以及是否由方法写入跟踪记录 TraceContext.WarnThe TraceContextRecord object encapsulates the trace message, category, any associated Exception, and whether the trace record was written by the TraceContext.Warn method.

对和方法的每次调用 TraceContext.Write TraceContext.Warn 都会生成一个 TraceContextRecord 添加到 TraceContextEventArgs.TraceRecords 消息集合的对象。Every call to the TraceContext.Write and TraceContext.Warn methods generates a TraceContextRecord object that is added to the TraceContextEventArgs.TraceRecords messages collection. 您可以通过处理事件来访问记录的集合 TraceFinishedYou can access the collection of records by handling the TraceFinished event.

构造函数

TraceContextRecord(String, String, Boolean, Exception)

初始化 TraceContextRecord 类的新实例。Initializes a new instance of the TraceContextRecord class.

属性

Category

获取跟踪记录的用户定义的类别。Gets the user-defined category for the trace record.

ErrorInfo

获取与跟踪记录关联的 Exception(如果有)。Gets the Exception associated with the trace record, if one is available.

IsWarning

获取一个值,该值指示跟踪记录是否与 Warn 方法调用关联。Gets a value indicating whether the trace record is associated with a Warn method call.

Message

获取用户定义的跟踪消息。Gets the user-defined trace message.

方法

Equals(Object)

确定指定对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(继承自 Object)
GetHashCode()

作为默认哈希函数。Serves as the default hash function.

(继承自 Object)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
ToString()

返回表示当前对象的字符串。Returns a string that represents the current object.

(继承自 Object)

适用于

另请参阅