Chapter 6. Add a row

Adding a new row is very simple. Start the definition of the new dataset with the command hk_datasource::setmode_insertrow() and end it with the already well known method mydatasource->store_changed_data();. Between these two methods set the values for each column with the method hk_column::set_asstring(const string&). You have to create hk_column objects for every column (=field) you want to add data.


Example 6-1. Add a row

   1 #include <hk_classes.h>
   2 #include <iostream>
   3 int main()
   4 {
   5    hk_drivermanager* mydrivermanager = new hk_drivermanager();
   6    if (mydrivermanager==NULL) {cout <<"error creating mydrivermanager"<<endl;exit(1);}
   7    hk_connection* myconnection = mydrivermanager->new_connection("mysql");
   8    if (myconnection==NULL) {cout <<"error creating myconnection"<<endl;exit(1);}
   9    myconnection->set_host("localhost");
  10    myconnection->set_user("root");
  11    myconnection->set_password("mypasswd");
  12    myconnection->connect();
  13 
  14    hk_database* mydatabase=myconnection->new_database("exampledb");
  15    if (mydatabase==NULL) {cout <<"error creating mydatabase"<<endl;exit(1);}
  16    hk_datasource* mydatasource= mydatabase->new_table("authors");
  17    if (mydatasource==NULL) {cout <<"error creating mydatasource"<<endl;exit(1);}
  18    mydatasource->enable();
  19 
  20    hk_column* mycolumn = mydatasource->column_by_name("name");
  21    if (mycolumn==NULL) {cout <<"error getting column"<<endl;exit(1);}
  22    mydatasource->setmode_insertrow();
  23    mycolumn->set_asstring("Fontane, Theodor");
  24    mydatasource->store_changed_data();
  25 
  26    delete mydrivermanager;
  27 }