IDebugProperty3::SetValueAsStringWithError

Mengatur nilai properti ini dan mengembalikan pesan kesalahan, jika perlu.

Sintaks

int SetValueAsStringWithError(
    string     pszValue,
    uint       dwRadix,
    uint       dwTimeout,
    out string errorString
);

HRESULT SetValueAsStringWithError(
    LPCOLESTR pszValue,
    DWORD     dwRadix,
    DWORD     dwTimeout,
    BSTR*     errorString
);

Parameter

pszValue
[di] Nilai yang akan diatur.

dwRadix
[di] Radiks nilai yang diatur.

dwTimeout
[di] Lamanya waktu untuk menunggu nilai diatur (INFINITE berarti tunggu selamanya).

errorString
[out] Jika ada kesalahan saat mengatur nilai, ini menyimpan alasan kegagalan tersebut.

Tampilkan Nilai

Jika berhasil, mengembalikan S_OK; jika tidak, mengembalikan kode galat.

Keterangan

Nilai masuk bisa menjadi ekspresi yang akan dievaluasi.

Contoh

Contoh berikut menunjukkan cara menerapkan metode ini untuk objek CProperty yang mengekspos antarmuka IDebugProperty3 .

HRESULT CProperty::SetValueAsStringWithError(
    LPCOLESTR in_szValue,
    DWORD in_RADIX,
    DWORD in_TIMEOUT,
    BSTR * out_ERRORTEXT
)
{
    // precondition
    REQUIRE( NULL != in_szValue );

    if (NULL == in_szValue)
        return E_INVALIDARG;

    INVARIANT( this );
    if (!this->ClassInvariant())
        return E_UNEXPECTED;

    if (NULL == m_pPropertyContext->m_pCEE->m_LanguageSpecificUseCases.pfSetValue)
        return S_OK;

    // function body
    DEBUG_PROPERTY_INFO dpInfo,dpInfo2;
    HRESULT HR = this->GetPropertyInfo(DEBUGPROP_INFO_FULLNAME | DEBUGPROP_INFO_ATTRIB | DEBUGPROP_INFO_TYPE | DEBUGPROP_INFO_VALUE_AUTOEXPAND,
                                       in_RADIX,
                                       in_TIMEOUT,
                                       NULL,
                                       0,
                                       &dpInfo);

    if (ENSURE( S_OK == HR ))
    {
        REQUIRE( NULL != dpInfo.bstrFullName );
        REQUIRE( NULL != dpInfo.bstrType );

        REQUIRE( NULL == dpInfo.bstrName );
        REQUIRE( NULL == dpInfo.bstrValue );
        REQUIRE( NULL == dpInfo.pProperty );

        BSTR bstrError = NULL;

        UINT ichError = 0;
        IDebugProperty2* pProperty = NULL;
        IDebugParsedExpression* pParsedExpression = NULL;

        CComBSTR bstrValue = dpInfo.bstrFullName;
        bstrValue += L" = ";
        bstrValue += in_szValue;
        HR = this->m_pPropertyContext->m_pCEE->
                Parse(bstrValue, 0, in_RADIX, &bstrError, &ichError, &pParsedExpression);
        if (S_OK == HR)
        {
            REQUIRE( NULL == bstrError );
            HR = pParsedExpression->EvaluateSync(EVAL_NOEVENTS | EVAL_RETURNVALUE,
                                                 in_TIMEOUT,
                                                 m_pPropertyContext->m_pSymbolProvider,
                                                 m_pPropertyContext->m_pAddress,
                                                 m_pPropertyContext->m_pBinder,
                                                 NULL,
                                                 &pProperty);

            dpInfo2.dwAttrib = DBG_ATTRIB_VALUE_ERROR;
            if (pProperty)
            {
                pProperty->GetPropertyInfo(DEBUGPROP_INFO_ATTRIB | DEBUGPROP_INFO_VALUE,10,in_TIMEOUT,NULL,0,&dpInfo2);
            }
            if (DBG_ATTRIB_VALUE_ERROR & dpInfo2.dwAttrib)
            {
                HR = E_FAIL;
                bstrError = dpInfo2.bstrValue;
            }
            else
            {
                ::SysFreeString(dpInfo.bstrValue);
            }
            EXTERNAL_RELEASE(pProperty);
            EXTERNAL_RELEASE(pParsedExpression);
        }

        if (bstrError)
        {
            if(out_ERRORTEXT)
            {
                *out_ERRORTEXT = bstrError;
                bstrError = NULL;
            }
            else
            {
                ::SysFreeString(bstrError);
            }
        }
        ::SysFreeString(dpInfo.bstrFullName);
        ::SysFreeString(dpInfo.bstrType);
    }

    // postcondition
    INVARIANT( this );

    return HR;
}

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