工程下载： http://www.cppblog.com/Files/dyj057/AdoDbv1.0-2007-1-25.rar

前几日看到有位大哥发布的 ADO 数据库的封装，到处是模板，不免有些头晕，想起自己写的 ADO 数据库封装了，首先声明没有模板。但根据我 3 年使用的经验，确实很实用，

特点：

l         多线程安全的。

l         使用标准 C++ 数据类型，屏蔽了 com 数据类型和异常，减少了复杂性。

l         操作简单，直观

1 ．下面是使用它进行存储过程的例子代码：

异常的处理请参看： http://www.cppblog.com/dyj057/archive/2007/01/24/17944.html

#include "AdoConn.h"

#include "AdoStoredProc.h"

#include "comm_exception.h"

using namespace C2217::StdLib;

using namespace C2217::Data;

void main()

{

       try

       {

              CAdoConn _conn("Provider=SQLOLEDB;Data Source=192.9.207.214;Initial Catalog=ibmsweb;User ID=sa; Password=sa;");

              _conn.Open();

              CAdoStoredProc sp(_conn,"Accounts_Roles_Create");

              CAdoStringPara para("Description", "Para9", 50);

              sp.AddPara(&para);

              int count =0  ;//sp.ExecuteNonQuery();

              cout << " affected cout " << count <<endl;

              CAdoStringPara *pStringPara = dynamic_cast<CAdoStringPara *>(sp["Description"]);

              if(pStringPara)

              {

                     cout << pStringPara->getValue() <<endl;

              }

              sp.ClearParameters();

              //Read to dataset

              CAdoRecordSet readResult;

              sp.setSpName("Accounts_Users_Select_All");

              cout << "Read affected item cout : " << sp.Execute(readResult);

              //cout << "Read Count :" << readResult.getRecordCount() <<endl;

       }

       catch(comm_exception &e)

       {

              SET_CATCH_POS(e);

              std::cout << e;

       }

       catch(const exception &e)

       {

              cout << e.what();

       }

}

2 ．读取数据的例子：

const CAdoConn &  _conn  =S_DeviceDb::instance()->GetAdoConn();

       CString sql;

       sql.Format("select * from %s where tag_name = '%s' ",

              m_tableName, GetName() );

       CAdoRecordSet result;

       int count = _conn.Execute(sql, result);

       if(count ==1)

       {

              result.MoveFirst();

              SetDescription( result.readStr("description").c_str());

              SetUnits( result.readStr("uints").c_str());

              SetType( result.readStr("data_type").c_str());

              SetWritebale( result.readInt("writeable"));

              SetExpress( result.readStr("cacu_express").c_str() );

              SetDeviceAddress( result.readInt("device_address"));

              SetRegisterAddress( result.readInt("register_address"));

              SetDataLen( result.readInt("data_length"));

              SetBitsStartIndex( result.readInt("start_bit_index"));

              SetBitsCount( result.readInt("bit_count"));

       }

3 ．删除数据的例子：

const CAdoConn &  _conn  =S_DeviceDb::instance()->GetAdoConn();

       CString sql;

       sql.Format("delete from %s where tag_name = '%s'", m_tableName, GetName() );

       _conn.ExecuteNonQuery( sql);

4 ．更新数据的例子：

const CAdoConn &  _conn  =S_DeviceDb::instance()->GetAdoConn();

       CString sql;

       sql.Format("update %s set description='%s',  uints='%s', data_type='%s',\

                        writeable=%d, cacu_express='%s', device_address=%d, register_address=%d, data_length =%d,\

                        start_bit_index = %d, bit_count = %d where tag_name = '%s' ", m_tableName, GetDescription(), GetUnits(), GetType(),

                        IsWriteable(), GetExpress(), GetDeviceAddress(), GetRegisterAddress(), GetDataLen(), GetBitsStartIndex(), GetBitsCount(), GetName() );

       VERIFY(_conn.ExecuteNonQuery(sql));