【求助】请高手们都帮忙看一下啊
我做了一个学生选课管理系统,在登陆的时候总是弹出一个对话框,提示Runtime出错,我用的是sqlserver2000的数据库服务器,登陆要用的用户ID和密码都保存在名为SC的数据库下的USER表中,用户ID和密码的输入分别用m_sUserID和m_sPassWord来记录,连接方式是ADO,我是用一个CString字符串传送sql语句,在执行ecord->open语句的时候出错,字符串如下:"SELECT * FROM USER WHERE UserID=%s",m_sUserID
完整程序如下,
void CTestDlg::OnLogin()
{
try
{
_RecordsetPtr pRecord;
_variant_t value;
if(UpdateData()==false)
return;
//生成Recordset实例
pRecord.CreateInstance("ADODB.Recordset");
CString sql;
sql.Format("SELECT * FROM USER WHERE UserID=%s",m_sUserID);
//打开记录集
pRecord->Open(sql.GetBuffer(0),_variant_t((IDispatch*)theApp.m_pConnection,true),adOpenStatic,adLockOptimistic,adCmdText); //这里提示出错
if(!pRecord->State)
{
MessageBox("不存在该用户");
}
else
{
sql+="AND PassWord=";
sql+=m_sPassWord;
pRecord->Open(sql.GetBuffer(0),_variant_t((IDispatch*)theApp.m_pConnection,true),adOpenStatic,adLockOptimistic,adCmdText);
if(!pRecord->State)
{
MessageBox("密码不正确");
}
else
{
MessageBox("登陆成功");
}
}
pRecord->Close();
pRecord=NULL;
}
catch(_com_error *e)
{
MessageBox(e->ErrorMessage());
}
}
请各位高手帮忙修改,感激不尽!
BOOL CTestApp::InitInstance()
{
AfxEnableControlContainer();
//初始化OLE支持,使本程序可以访问数据库
if(AfxOleInit()==false)
{
MessageBox(NULL,"初始化OLE支持失败","失败",MB_OK);
return false;
}
//连接数据库
try
{
HRESULT hr;
hr = m_pConnection.CreateInstance("ADODB.Connection");///创建Connection对象
if(SUCCEEDED(hr))
{
hr = m_pConnection->Open("Data Source=sc;UID=sa;PWD=;","","",adModeUnknown);
if(SUCCEEDED(hr))
{
}
}
}
catch(_com_error e)///捕捉异常
{
CString errormessage;
errormessage.Format("连接数据库失败!\r\n错误信息:%s",e.ErrorMessage());
AfxMessageBox(errormessage);///显示错误信息
return FALSE;
}
try
{
if(m_pConnection->State)
m_pConnection->Close(); ///如果已经打开了连接则关闭它
}
catch(...)
{
}
#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif
CTestDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
// TODO: Place code here to handle when the dialog is
// dismissed with OK
}
else if (nResponse == IDCANCEL)
{
// TODO: Place code here to handle when the dialog is
// dismissed with Cancel
}
// Since the dialog has been closed, return FALSE so that we exit the
// application, rather than start the application's message pump.
return FALSE;
}
[[it] 本帖最后由 fingerplay 于 2008-7-12 13:22 编辑 [/it]] 乱七八糟的 你把你的源程序打包上传 把你的数据库建表的也用txt文档上传 我给你看看
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