Qt Forum

houmingc

My server is not receiving data from my client.
Don't understand what does seek() do and why need 2object out and block at the same time.

Below is my code

@

            socket.connectToHost(ServerIP,10010);
            qint16 CRC;
            unsigned char TCPdata[5];
            TCPdata[0]=0x20;
            TCPdata[1]=0x20;
            TCPdata[2]=0x00;
            CRC =ModbusCRC((unsigned char*)TCPdata,3);



            QByteArray block;
            QDataStream out(&block,QIODevice::WriteOnly);
            out.setVersion(QDataStream::Qt_5_0);

            out.device()->seek(0);
            out<<0x20<<DeviceNum<<0x00<<CRC;

           socket.writeData(block.data(),block.size());

@

SGaist

Hi,

Please don't post the almost same question twice, closing this one

"Duplicate":http://qt-project.org/forums/viewthread/50953/