Symbian描述符（2）-TDesC8与TDesC16之间的互转

　　1、使用Copy

 _LIT8(KTestStr,"Thisisastring");TBufC8<50>buf(KTestStr);TBuf<100>newBuf;newBuf.Copy(buf);TBuf8<50>newBuf1;newBuf1.Copy(newBuf);

　　2、使用CCnvCharacterSetConverter类

_LIT8(KTestStr,"ThisisaString"n");TBufC8<50>buf(KTestStr);CCnvCharacterSetConverter*conv=CCnvCharacterSetConverter::NewL();CleanupStack::PushL(conv);RFsfs;User::LeaveIfError(fs.Connect());if(conv->PrepareToConvertToOrFromL(KCharacterSetIdentifierAscii,fs)!=CCnvCharacterSetConverter::EAvailable){User::Leave(KErrNotSupported);}HBufC*str=HBufC::NewL(buf.Length());CleanupStack::PushL(str);TPtrptr=str->Des();TIntstate=CCnvCharacterSetConverter::KStateDefault;if(conv->ConvertToUnicode(ptr,buf,state)==CCnvCharacterSetConverter::EErrorIllFormedInput){User::Leave(KErrArgument);}fs.Close();console->Write(ptr);CleanupStack::PopAndDestroy(2);//str,conv