TDesC8和TDesC16之间的转换

  1、使用Copy
_LIT8(KTestStr, " This is a string " );
TBufC8 < 50 > buf(KTestStr);

TBuf < 100 > newBuf;
newBuf.Copy(buf);

TBuf8 < 50 > newBuf1;
newBuf1.Copy(newBuf);

2、使用CCnvCharacterSetConverter类
_LIT8(KTestStr, " This is a String " n " );
TBufC8 < 50 > buf(KTestStr);

CCnvCharacterSetConverter * conv = CCnvCharacterSetConverter::NewL();

CleanupStack::PushL(conv);

RFs fs;
User::LeaveIfError(fs.Connect());

if (conv -> PrepareToConvertToOrFromL(KCharacterSetIdentifierAscii, fs) != CCnvCharacterSetConverter::EAvailable)
{
User::Leave(KErrNotSupported);
}

HBufC * str = HBufC::NewL(buf.Length());
CleanupStack::PushL(str);

TPtr ptr = str -> Des();
TInt state = CCnvCharacterSetConverter::KStateDefault;

if (conv -> ConvertToUnicode(ptr, buf, state) == CCnvCharacterSetConverter::EErrorIllFormedInput)
{
User::Leave(KErrArgument);
}

fs.Close();
console -> Write(ptr);


CleanupStack::PopAndDestroy( 2 );