如何用qt

Question

将数据插入到sqlite的如何使用qt将数据插入sqlite：

query = QSqlQuery("INSERT INTO customer_details (rationcard_num, aadharcard_num, name) 
    values('"+rationcard_num+"','"+aadharcard_num+"','"+name+"')"); 

Answer 1

你也许可以致电查询exec()或直接与exec(const QString& query)调用它。因此，例如，你可以这样做：

QSqlQuery query; 
query.exec("INSERT INTO customer_details (rationcard_num, aadharcard_num, name)" 
      + "values('" + rationcard_num + "','" + aadharcard_num + "','" 
      + name + "')"); 

然而，如果你想使用一个事先准备好的声明你想构建一个QSqlDatabase查询，调用该prepare(statement)并绑定值。例如：

QSqlQuery query; 
query.prepare("INSERT INTO person (rationcard_num, aadharcard_num, name) " 
       "VALUES (:rationcard_num, :aadharcard_num, :name)"); 
query.bindValue(":rationcard_num", rationcard_num); 
query.bindValue(":aadharcard_num", aadharcard_num); 
query.bindValue(":name", name); 
query.exec(); 

Answer 2

您可以修改您的代码并查询这个样子的，我认为这将澄清你的疑虑：

准备查询语句

QSqlQuery query; 
query.prepare("INSERT INTO customer_details(rationcard_num, aadharcard_num, name) values(:rationcard_num,:aadharcard_num,name)"); 

绑定值

query.bindValue(":rationcard_num",your_value); 
query.bindValue(":aadharcard_num",your_value); 
query.bindValue(":name",your_value); 

调试

您可以使用qDebug()找到，如果您的查询是可执行文件：

qDebug()<<query.exec()<<endl; 

如果插入，否则为假

Answer 3

QSqlQuery query; 
query.exec("INSERT INTO customer_details (rationcard_num,aadharcard_num,name)VALUES('"+rationcard_num+"','"+aadharcard_num+"','"+name+")");