SQLite C++ 封装:easySQLite
时间:2016-05-29 13:28 来源:linux.it.net.cn 作者:IT
一个简单的 SQLite C++ 封装.
优势:
-
优雅的面向对象解决方案
-
显式命名和调用
-
使用异常以及方法返回值
-
容易理解
-
灵活而且可扩展
-
经过强测试
//define table structure
Field definition_tbPerson[] =
{
Field(FIELD_KEY),
Field("fname", type_text, flag_not_null),
Field("lname", type_text, flag_not_null),
Field("birthdate", type_time),
Field(DEFINITION_END),
};
//define database object
sql::Database db;
try
{
//open database file
db.open("test.db");
//define table object
Table tbPerson(db.getHandle(), "person", definition_tbPerson);
//remove table from database if exists
if (tbPerson.exists())
tbPerson.remove();
//create new table
tbPerson.create();
//define new record
Record record(tbPerson.fields());
//set record data
record.setString("fname", "Jan");
record.setString("lname", "Kowalski");
record.setTime("birthdate", time::now());
//add 10 records
for (int index = 0; index < 10; index++)
tbPerson.addRecord(&record);
//select record to update
if (Record* record = tbPerson.getRecordByKeyId(7))
{
record->setString("fname", "Frank");
record->setString("lname", "Sinatra");
record->setNull("birthdate");
tbPerson.updateRecord(record);
}
//load all records
tbPerson.open();
//list loaded records
for (int index = 0; index < tbPerson.recordCount(); index++)
if (Record* record = tbPerson.getRecord(index))
sql::log(record->toString());
sql::log("");
sql::log("ALL OK");
} catch (Exception e) {
printf("ERROR: %s\r\n", e.msg().c_str());
}
(责任编辑:IT)
一个简单的 SQLite C++ 封装.优势:
//define table structure Field definition_tbPerson[] = { Field(FIELD_KEY), Field("fname", type_text, flag_not_null), Field("lname", type_text, flag_not_null), Field("birthdate", type_time), Field(DEFINITION_END), }; //define database object sql::Database db; try { //open database file db.open("test.db"); //define table object Table tbPerson(db.getHandle(), "person", definition_tbPerson); //remove table from database if exists if (tbPerson.exists()) tbPerson.remove(); //create new table tbPerson.create(); //define new record Record record(tbPerson.fields()); //set record data record.setString("fname", "Jan"); record.setString("lname", "Kowalski"); record.setTime("birthdate", time::now()); //add 10 records for (int index = 0; index < 10; index++) tbPerson.addRecord(&record); //select record to update if (Record* record = tbPerson.getRecordByKeyId(7)) { record->setString("fname", "Frank"); record->setString("lname", "Sinatra"); record->setNull("birthdate"); tbPerson.updateRecord(record); } //load all records tbPerson.open(); //list loaded records for (int index = 0; index < tbPerson.recordCount(); index++) if (Record* record = tbPerson.getRecord(index)) sql::log(record->toString()); sql::log(""); sql::log("ALL OK"); } catch (Exception e) { printf("ERROR: %s\r\n", e.msg().c_str()); } (责任编辑:IT) |