TraceContextEventArgs.TraceRecords 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取与当前请求关联的 TraceContextRecord 消息的集合。
public:
property System::Collections::ICollection ^ TraceRecords { System::Collections::ICollection ^ get(); };public System.Collections.ICollection TraceRecords { get; }member this.TraceRecords : System.Collections.ICollectionPublic ReadOnly Property TraceRecords As ICollection属性值
与当前请求关联的跟踪记录的集合。
示例
下面的代码示例演示如何注册 TraceContextEventHandler 委托来处理 TraceFinished 事件。 在此示例中，OnTraceFinished方法通过 TraceRecords 属性访问对象的集合TraceContextRecord，循环访问对象集合，并将其写入响应流。
<%@ 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
每次调用 TraceContext.Write 和 TraceContext.Warn 方法都会生成一个 TraceContextRecord 对象，该对象将添加到消息集合中 TraceRecords 。 方法 Warn 调用将 IsWarning 属性设置为 true，而其他方法调用将其设置为 false。
可以循环访问消息并 TraceRecords 检查具有特定类别或消息的记录，以及它们是否为警告。
