16,814
社区成员




//创建数据库
QSqlQuery sqlQuery;
QString creatUserTable="create table student (id int primary key, name varchar(30), age int)";
QString creatUser0="insert into student values (0,admin,admin)";
QString creatUser1="insert into student values (1,admin111,admin111)";
sqlQuery.prepare(creatUserTable);
sqlQuery.prepare(creatUser0);
sqlQuery.prepare(creatUser1);
QSqlQuery query;
query.exec("select name from student");//查询数据库里的信息
while (query.next()) {
userNameEdit->setText(query.value(0).toString());
qDebug()<<"运行";//整个while语句不执行
}
QSqlQuery query;
query.exec("select name from student");
while(query.next())
{
QString name = query.value(0).toString();
qDebug()<<"name:"<<name;
ui->userNameEdit->setText(name) ;
}