TraceContext.Write 方法

參考

定義

命名空間:: System.Web

組件:: System.Web.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

將追蹤資訊寫入檢測檔。

多載

Write(String)	將追蹤資訊寫入檢測檔。
Write(String, String)	將追蹤資訊寫入檢測檔，包括訊息和任何使用者定義的分類。
Write(String, String, Exception)	將追蹤資訊寫入追蹤記錄檔，包括任何使用者定義的分類、追蹤訊息和錯誤資訊。

Write(String)

將追蹤資訊寫入檢測檔。

public:
 void Write(System::String ^ message);

public void Write (string message);

member this.Write : string -> unit

Public Sub Write (message As String)

參數

message: String

要寫入記錄檔的追蹤訊息。

備註

每次呼叫方法時 Write ， TraceContext 都會將追蹤訊息新增至 TraceRecords 訊息集合，當您處理事件時，即可存取此 TraceFinished 集合。訊息會新增，其 IsWarning 屬性設定為 false ，並將其 ErrorInfo 屬性設定為 null。

另請參閱

ASP.NET 追蹤概觀

適用於

Write(String, String)

將追蹤資訊寫入檢測檔，包括訊息和任何使用者定義的分類。

public:
 void Write(System::String ^ category, System::String ^ message);

public void Write (string category, string message);

member this.Write : string * string -> unit

Public Sub Write (category As String, message As String)

參數

category: String

接收訊息的追蹤分類。

message: String

要寫入記錄檔的追蹤訊息。

範例

下列程式代碼範例示範如何呼叫方法， Write 將錯誤追蹤訊息寫入追蹤記錄檔。在此範例中，委派會逐一查看追蹤訊息，並將其寫入為 HTML 數據表;不過，您可以將相同的資訊寫入資料庫或分析工具取用者。

<%@ 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.
    Response.Write("<table>");
    foreach(object o in e.TraceRecords)
    {
        r = (TraceContextRecord)o;
        Response.Write(String.Format("<tr><td>{0}</td><td>{1}</td></tr>", r.Message, r.Category));        
    }
    Response.Write("</table>");
}       
</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.
    Response.Write("<table>")
    For Each o In e.TraceRecords
        r = CType(o, TraceContextRecord)
        Response.Write(String.Format("<tr><td>{0}</td><td>{1}</td></tr>", r.Message, r.Category))
    Next
    Response.Write("</table>")

End Sub ' OnTraceFinished
</script>

備註

另請參閱

ASP.NET 追蹤概觀

適用於

Write(String, String, Exception)

將追蹤資訊寫入追蹤記錄檔，包括任何使用者定義的分類、追蹤訊息和錯誤資訊。

public:
 void Write(System::String ^ category, System::String ^ message, Exception ^ errorInfo);

public void Write (string category, string message, Exception errorInfo);

member this.Write : string * string * Exception -> unit

Public Sub Write (category As String, message As String, errorInfo As Exception)

參數

category: String

接收訊息的追蹤分類。

message: String

要寫入記錄檔的追蹤訊息。

errorInfo: Exception

Exception，包含關於錯誤的資訊。

範例

下列程式代碼範例示範如何呼叫方法， Write 將錯誤追蹤訊息寫入追蹤記錄檔。在此範例中，不同的例外狀況會追蹤為錯誤和警告。當頁面擲回 ArgumentException時，它會使用 Warn 方法寫入警告訊息。當頁面擲回 InvalidOperationException時，它會使用 Write 方法寫入錯誤訊息。

<%@ 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);

    try {
        throw new ArgumentException("Trace Test");
    }
    catch (InvalidOperationException ioe) {    
        // You can write an error trace message using the Write method.
        Trace.Write("Exception Handling", "Exception: Page_Load.", ioe);
    }
    catch (ArgumentException ae) {    
        // You can write a warning trace message using the Warn method.
        Trace.Warn("Exception Handling", "Warning: Page_Load.", ae);
    }
}
 
// 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;
        if (r.IsWarning) {
            Response.Write(String.Format("warning message: {0} <BR>", r.Message));
        }
        else {
            Response.Write(String.Format("error 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

    Try 
    Dim ae As New ArgumentException("Trace Test")
        Throw ae
    
    catch ioe As InvalidOperationException
        ' You can write an error trace message using the Write method.
        Trace.Write("Exception Handling", "Exception: Page_Load.", ioe)
    
    Catch ae As ArgumentException
        ' You can write a warning trace message using the Warn method.
        Trace.Warn("Exception Handling", "Warning: Page_Load.", ae)

    End Try

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)
    If r.IsWarning Then
            Response.Write(String.Format("warning message: {0} <BR>", r.Message))
        Else
            Response.Write(String.Format("error message: {0} <BR>", r.Message))
        End If
    Next

End Sub	' OnTraceFinished
</script>

備註

每次呼叫方法時 Write ， TraceContext 都會將追蹤訊息新增至 TraceRecords 訊息集合，當您處理事件時，即可存取此 TraceFinished 集合。訊息會以其屬性設定為來新增IsWarning，而 ErrorInfo 屬性會設定為參數所errorInfo傳遞false的物件。

另請參閱

適用於

共用方式為

TraceContext.Write 方法

定義

多載

Write(String)

參數

備註

另請參閱

適用於

Write(String, String)

參數

範例

備註

另請參閱

適用於

Write(String, String, Exception)

參數

範例

備註

另請參閱

適用於

其他資源