To display Ip address in Qlineedit

guru

how to display Local system Ip address, by using Qlineedit in a dialog. in this case I use lineedit at readonly mode.

SGaist

Hi,

What is it that you need ? The way to get the IP address of the system or how to show it in a QLineEdit ?

guru

i wanna get ip address of the system and also to show it in a QLineedit..

SGaist

So you are looking for "QNetworkInterface":http://qt-project.org/doc/qt-4.8/qnetworkinterface.html and QLineEdit's "setText":http://qt-project.org/doc/qt-4.8/qlineedit.html#text-prop but you could use a QLabel instead if the QLineEdit will only be used read-only.

guru

i need a small example.. be coz im new to qt tool..

SGaist

You have everything you need in the Qt's documentation/demos/example for QLineEdit.

As for QNetworkInterfaces, as a first try:

@QHostAddress firstHostAddress = QNetworkInterfaces::allHostAddresses();
QString hostAddressString = firstHostAddress.toString()
lineEdit->setText(hostAddressString;@

guru

thanks @sGaist for your response.. i found another way...

foreach (const QHostAddress &address, QNetworkInterface::allAddresses())
{

    if (address.protocol() == QAbstractSocket::IPv4Protocol && address != QHostAddress(QHostAddress::LocalHost))

        ui->lineedit->setText(address.toString());

}

bipll

@ui->lineedit->setText("127.0.0.1");@
Can I get my prize now? 8-)

SGaist

guru are you sure that your code does what you want ?

You're iterating all addresses and only show the last one which is not localhost.

Also, please enclose your code in coding tags, that will make it readable

guru

sorry for my late reply Gaist, that code perfectly working and i use it in my linux system...
@
foreach (const QHostAddress &address, QNetworkInterface::allAddresses())
{
if (address.protocol() == QAbstractSocket::IPv4Protocol && address != QHostAddress(QHostAddress::LocalHost))

ui->lineedit->setText(address.toString());
}
@

SGaist

I am not saying it's not working, just that it does not necessarily does what you think.

Keep in mind that if you have several network interfaces you'll only get the last address of the last interface that is not localhost.

guru

but it displays one address in lineedit box.. i aslo check that address in my winxp os.. its same ip.

SGaist

I also confirm it does, I am just saying that you are lucky because you happen to only have one network interface so both addresses matches. But if you have more like wifi + lan you'll get the address of one of the two interfaces maybe not the one you want, just beware of that, that's all.

guru

yeah, its correct, now im using pc, i connected through LAN, thanks for your suggesstion, i will consider in my future..

RohitIti

it displays all interface address. why you are getting the last address is that every time the textbox value is been over written for each entry of the loop. You are thinking that it is only address. try to put qdebug() << address.toString(); you will see the output.

RohitIti

it displays all interface address. why you are getting the last address is that every time the textbox value is been over written for each entry of the loop. You are thinking that it is only address. try to put qdebug() << address.toString(); you will see the output.