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ITracing::SetTraceLevel 方法 (wdtf.h)

SetTraceLevel 方法會設定對象的追蹤層級。 WDTF 物件模型中的每個物件都應該支援 setTraceLevel 方法

語法

HRESULT SetTraceLevel(
  [in] TTraceLevel Level
);

參數

[in] Level

這個物件的新 TTraceLevel 值。

傳回值

SetTraceLevel 會傳回標準 HRESULT 值。

言論

如需追蹤層級的詳細資訊,請參閱 TTraceLevelITracer

使用 Trace_Default 層級,將物件設定回物件共同類別登錄中定義的設定。

由於 IAction 介面繼承自 ITracing 介面,因此所有 WDTF Actions 都會支援 setTraceLevel 。 所有 WDTF 核心介面 也應該支援此方法。

下列程式代碼範例示範如何使用 SetTraceLevel 方法。

VBScript

'
' Get DeviceManagement Action interface for the target
'
Set Action = CDROM.GetInterface("DeviceManagement")
 
If Err.number <> 0 Then
    WScript.Echo Space(4) & "Failed to get interface DeviceManagement. Error Number:" & Err.number
Else            
    '
    ' Set the tracing level to HIGH
    '
    Action.SetTraceLevel(Trace3_High)
    If Err.number <> 0 Then
        WScript.Echo Space(4) & "Failed to set tracing level to 'High'. Error Number:" & Err.number
    End If

    '
    ' Disable the CD-ROM
    '
    WScript.Echo Space(4) & "Trying to disable device..."
 
    Action.Disable()
 
    If Err.number <> 0 Then
        WScript.Echo Space(4) & "Failed to disable the specified CDROM. Error     Number:" & Err.number & vbcrlf
    Else
        WScript.Echo Space(4) & "Specified CDROM successfully disabled." & vbcrlf
    End If
End If

C++

IDevMan* pDevMan;        // DeviceManagement Action interface

VARIANT vtEmpty;       // To be passed as a parameter to ITarget::GetInterface
VariantInit(&vtEmpty);

//
// Get DeviceManagement Action interface
//
hr = pCDROM->GetInterface(L"DeviceManagement", vtEmpty, vtEmpty, (IAction**)(&pDevMan));
if(FAILED(hr))
{
    _tprintf(_T("\n  Failed to get DeviceManagement Interface for specified CDROM Device. Error: 0x%x"), hr);
 goto Cleanup;
}

//
// Set the trace level to High
//
hr = pDevMan->SetTraceLevel(Trace3_High);
if(FAILED(hr))
{
    _tprintf(_T("\n  Failed to set tracing level to 'High'. Error: 0x%x"), hr);
}
 
//
// Disable the CD-ROM
//
_tprintf(_T("\n  Trying to disable device..."));

hr = pDevMan->Disable();
if(FAILED(hr))
{
    _tprintf(_T("\n  Failed to disable the specified CDROM. Error: 0x%x"), hr);
}
else
{
    _tprintf(_T("\n  Specified CDROM successfully disabled."));
}

要求

要求 價值
目標平臺 桌面
標頭 wdtf.h

另請參閱

ITracer

ITracing

TTraceLevel