qt_tcp_client_server.rar

#include "widget.h" #include "ui_widget.h" #include <QMessageBox> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); this->setWindowTitle("Client"); this->client = new QTcpSocket(this); connect(this->ui->requestPushButton, SIGNAL(clicked()), this, SLOT(clickRequestButton())); connect(this->client, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(displayError(QAbstractSocket::SocketError))); connect(this->client, SIGNAL(readyRead()), this, SLOT(readFormServer())); } Widget::~Widget() { delete ui; } void Widget::clickRequestButton() { sendToServer(); } void Widget::sendToServer() { this->client->abort(); QString ip = "localhost"; int port = 9876; this->client->connectToHost(ip, port); QString str = this->ui->toTextEdit->toPlainText(); if(str != "") { string str2 = string(str.toAscii().data()); const char *str3 = str2.c_str(); this->client->write(str3); } } void Widget::readFormServer() { this->ui->fromTextEdit->clear(); QString str5; str5 = this->client->readAll(); this->ui->fromTextEdit->setText(str5); } void Widget::displayError(QAbstractSocket::SocketError) { this->ui->errorLabel->setText(this->client->errorString()); }