时间:2021-07-01 10:21:17 帮助过:66人阅读
有一个1.mdb的数据库,有一个zy的表,如何用ado操作。 先封转一个类,如下: .h class CDataSource {public:void FreeData();void InitData();CDataSource();virtual ~CDataSource();_RecordsetPtr m_pRecordset;_ConnectionPtr m_pConn;}; .cpp CDataSource
有一个1.mdb的数据库,有一个zy的表,如何用ado操作。
先封转一个类,如下:
.h
class CDataSource { public: void FreeData(); void InitData(); CDataSource(); virtual ~CDataSource(); _RecordsetPtr m_pRecordset; _ConnectionPtr m_pConn; };
.cpp
CDataSource::CDataSource() { } CDataSource::~CDataSource() { FreeData(); } void CDataSource::InitData() { ::CoInitialize(NULL); m_pConn.CreateInstance("ADODB.Connection"); //初始化记录集对象 m_pRecordset.CreateInstance("ADODB.Recordset"); try { m_pConn->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:1.mdb", "", "", adModeUnknown); // m_pConn->ConnectionString="provider=SQLOLEDB.1;uid=sa;pwd=;Database=ff"; // m_pConn->Open("", "", "", adModeUnknown); m_pRecordset->Open( "select * from zy", _variant_t((IDispatch *) m_pConn, true),adOpenStatic, adLockReadOnly, adCmdText); } catch(_com_error &e) { ::AfxMessageBox(e.ErrorMessage()); } } void CDataSource::FreeData() { if (m_pConn) { m_pConn->Close(); m_pRecordset.Release(); m_pConn.Release(); CoUninitialize(); } }
在主对话框里创建一个对象CDataSource m_ds;,在对话框起来的时候m_ds.InitData();
添加:
m_ds.m_pConn->Execute((_bstr_t)“查询语句”,NULL,adCmdText);
m_ds.m_pRecordset->Requery(adCmdUnknown);
删除:
m_ds.m_pConn->Execute((_bstr_t)“删除语句”,NULL,adCmdText);
m_ds.m_pRecordset->Requery(adCmdUnknown);
修改:
m_ds.m_pConn->Execute((_bstr_t)“修改语句”,NULL,adCmdText);
m_ds.m_pRecordset->Requery(adCmdUnknown);
遍历:
有个链表CListCtrl m_list;
while (!m_ds.m_pRecordset->EndOfFile)
{
m_list.InsertItem(i,"sdf");
m_list.SetItemText(i,0,(LPCTSTR)(_bstr_t)m_ds.m_pRecordset->GetCollect("id"));
m_list.SetItemText(i,1,(LPCTSTR)(_bstr_t)m_ds.m_pRecordset->GetCollect("name"));
m_list.SetItemText(i++,2,(LPCTSTR)(_bstr_t)m_ds.m_pRecordset->GetCollect("hobby"));
m_ds.m_pRecordset->MoveNext();
}
m_ds.m_pRecordset->MoveFirst();
问题:
Win7上编译的ADO程序无法在低版本系统上运行,创建ADO时提示错误:0x80004002
如下语句:
hr1 = m_pConnection.CreateInstance(__uuidof(Connection));
解决办法:
下载msado60_Backcompat.tlb,地址见:http://download.csdn.net/detail/evsqiezi/8244221,相关代码导入修改为:
#import "msado60_Backcompat.tlb" no_namespace rename("EOF","EndOfFile")