Struct in network

Hi ,
Can anyone please tell me how to pass a struct thru a QTcpSocket!
the struct is like this for eg

Code:

---

struct sname
{
   qint16 q;
   QString a;
   QString b;
}

---

the tcpsocket->write method accepts only qbytearray as the data to send. so can u please tell me how to convert a struct into a qbytearray or
is there anyother method to send this data to the server.
i use QT4.2.2 in linux kernel version 2.6
--
thnks ..

See QDataStream and [WIKI]Using custom data types with Qt[/WIKI].

will the use of QVariant help.

i tried using the following

Code:

---

#include <QtGui>
#include <QMetaType>

---

Code:

---

struct cin
    {
       char *ue;
       char *pd;
    };
    Q_DECLARE_METATYPE(cin);
    QVariant b;
    struct cin ud;
    ud.usrname=lineedit->text().toAscii().data();
    ud.usrname=lineedit1->text().toAscii().data();
    b.setValue(ud); 
    cin ud1 = b.value<cin>();
    statuslabel->setText(ud1.ue);

---

but i am getting the following error.

Code:

---

error: expected primary-expression before "template"
error: expected `;' before "template"
error: no matching function for call to `QVariant::setValue(dslgimpl::senddata()::cin&)'
error: no matching function for call to `QVariant::value()'

---

can anyone help me in finding the problem.

--
Thanks..

First of all, QVariant::setValue() is a template function. Secondly, you MUST NOT do this:

Code:

---

ud.usrname=lineedit->text().toAscii().data();
ud.usrname=lineedit1->text().toAscii().data();

---

You are storing pointers to internal data of temporary objects. They become invalid as soon as those temporary QByteArray objects returned by QString::toAscii() go out of scope. This is immediately after the corresponding instruction.

thats a mistake its actually...

Code:

---

ud.ue=lineedit->text().toAscii().data();
      ud.pd=lineedit1->text().toAscii().data();

---

Quote:

---

Originally Posted by sribalaji

thats a mistake its actually...

Code:

---

ud.ue=lineedit->text().toAscii().data();
      ud.pd=lineedit1->text().toAscii().data();

---

---

But it doesn't change the fact that you are still storing a pointer to something that doesn't exist after that particular line has been executed.

but the value is getting stored.

It's a pointer to data which has been destroyed.