`
- 浏览:
372957 次
- 性别:
- 来自:
苏州
-
-
-
-
-
#ifndefSAIOSQLCE_DLL_FILE
-
#defineSAIOSQLCE_DLL_FILE
-
#endif
-
#include"stdafx.h"
-
#include"SAIOSQLCEDBManage.h"
-
#include"SaioSqlce.h"
-
#ifdef_DEBUG
-
#undefTHIS_FILE
-
staticcharTHIS_FILE[]=__FILE__;
-
#definenewDEBUG_NEW
-
#endif
-
-
#defineCUP_DB_FILE_T("\\Saio\\UserPrograms\\WIC\\WICDB.sdf")
-
#defineCUP_DB_TEMP_T("\\Saio\\UserPrograms\\WIC\\WICDB.sd2")
-
-
-
- CDBManage::CDBManage()
- {
- }
- CDBManage::~CDBManage()
- {
- }
-
-
BOOLCDBManage::OpenDB()
- {
-
InitConnectvariable(_T("\\Saio\\UserPrograms\\WIC\\WICDB.sdf"));
-
returnOpenConnection();
- }
-
-
BOOLCDBManage::CloseDB()
- {
-
BOOLbRet=TRUE;
- bRet=CloseRecordset();
- bRet&=CloseConnection();
-
returnbRet;
- }
-
-
BOOLCDBManage::ShrinkDB()
- {
- CloseDB();
-
TCHARszDbPwd[]=_T("");
-
BOOLbRet=TRUE,bDelRet=FALSE;
-
DWORDdwErr=0;
-
HRESULThr=NOERROR;
- DBPROPSETdbpropset[2];
- DBPROPdbprop[2];
- IDBProperties*pIDBProperties=NULL;
- IDBCreateSession*pIDBCreateSession=NULL;
- ISSCECompact*pISSCECompact=NULL;
- IDBSchemaRowset*pIDBSchemaRowset=NULL;
- VariantInit(&dbprop[0].vValue);
-
hr=CoCreateInstance(CLSID_SQLSERVERCE_2_0,0,CLSCTX_INPROC_SERVER,IID_IDBProperties,(void**)&pIDBProperties);
-
if(FAILED(hr))
- {
- dwErr=GetLastError();
- bRet=FALSE;
-
gotoExit;
- }
- dbprop[0].dwPropertyID=DBPROP_INIT_DATASOURCE;
- dbprop[0].dwOptions=DBPROPOPTIONS_REQUIRED;
- dbprop[0].vValue.vt=VT_BSTR;
- dbprop[0].vValue.bstrVal=SysAllocString(CUP_DB_FILE);
-
if(NULL==dbprop[0].vValue.bstrVal)
- {
- hr=E_OUTOFMEMORY;
- dwErr=GetLastError();
- bRet=FALSE;
-
gotoExit;
- }
- dbprop[1].dwPropertyID=DBPROP_SSCE_DBPASSWORD;
- dbprop[1].dwOptions=DBPROPOPTIONS_REQUIRED;
- dbprop[1].vValue.vt=VT_BSTR;
- dbprop[1].vValue.bstrVal=SysAllocString(szDbPwd);
- dbpropset[0].guidPropertySet=DBPROPSET_DBINIT;
- dbpropset[0].rgProperties=dbprop;
- dbpropset[0].cProperties=1;
- ;
- dbpropset[1].guidPropertySet=DBPROPSET_SSCE_DBINIT;
- dbpropset[1].rgProperties=&dbprop[1];
- dbpropset[1].cProperties=1;
- hr=pIDBProperties->SetProperties(2,dbpropset);
-
if(FAILED(hr))
- {
- dwErr=GetLastError();
- bRet=FALSE;
-
gotoExit;
- }
-
hr=pIDBProperties->QueryInterface(IID_ISSCECompact,(void**)&pISSCECompact);
-
if(FAILED(hr))
- {
- dwErr=GetLastError();
- bRet=FALSE;
-
gotoExit;
- }
- bDelRet=DeleteFile(CUP_DB_TEMP);
- SysFreeString(dbprop[0].vValue.bstrVal);
- dbprop[0].vValue.bstrVal=SysAllocString(CUP_DB_TEMP);
-
if(NULL==dbprop[0].vValue.bstrVal)
- {
- hr=E_OUTOFMEMORY;
- dwErr=GetLastError();
- bRet=FALSE;
-
gotoExit;
- }
- hr=pISSCECompact->Compact(1,dbpropset);
-
if(FAILED(hr))
- {
- dwErr=GetLastError();
- bRet=FALSE;
-
gotoExit;
- }
- bDelRet=CopyFile(CUP_DB_TEMP,CUP_DB_FILE,FALSE);
-
if(bDelRet)
- {
- bDelRet=DeleteFile(CUP_DB_TEMP);
- }
- Exit:
- VariantClear(&dbprop[0].vValue);
-
if(NULL!=pISSCECompact)
- {
- pISSCECompact->Release();
- }
-
if(NULL!=pIDBSchemaRowset)
- {
- pIDBSchemaRowset->Release();
- }
-
if(NULL!=pIDBCreateSession)
- {
- pIDBCreateSession->Release();
- }
-
if(NULL!=pIDBProperties)
- {
- pIDBProperties->Release();
- }
-
returnbRet;
- }
-
-
BOOLCDBManage::InitDB()
- {
-
BOOLbRet=TRUE;
-
- CloseRecordset();
-
- bRet&=InitUserTable();
-
- bRet&=InitParamTable();
-
- bRet&=InitAPLTable();
-
- bRet&=InitPriceTable();
-
- bRet&=InitTransTable();
-
- bRet&=InitUpdateTable();
-
returnbRet;
- }
-
-
BOOLCDBManage::InitUserTable()
- {
-
BOOLbRet=TRUE;
-
-
CStringcsSql=_T("DROPTableUserTb");
- ExecuteSQL(csSql);
-
-
csSql=_T("CREATETABLEUserTb(uidnvarchar(6)PRIMARYKEY,pwdnvarchar(6)NOTNULL,privilegenchar(1)NOTNULL);");
- bRet&=ExecuteSQL(csSql);
-
-
-
-
-
csSql=_T("INSERTINTOUserTb(uid,pwd,privilege)VALUES('1234','1234','1');");
- bRet&=ExecuteSQL(csSql);
-
-
-
-
-
csSql=_T("INSERTINTOUserTb(uid,pwd,privilege)VALUES('123456','123456','2');");
- bRet&=ExecuteSQL(csSql);
-
returnbRet;
- }
-
BOOLCDBManage::InitParamTable()
- {
-
BOOLbRet=TRUE;
-
-
CStringcsSql=_T("DROPTableParamTb");
- ExecuteSQL(csSql);
-
-
csSql=_T("CREATETABLEParamTb(pidsmallintPRIMARYKEY,pnamenvarchar(30),pvaluenvarchar(40));");
- bRet&=ExecuteSQL(csSql);
-
returnbRet;
- }
-
BOOLCDBManage::InitAPLTable()
- {
-
BOOLbRet=TRUE;
-
-
CStringcsSql=_T("DROPTableAPLTb");
- ExecuteSQL(csSql);
-
-
csSql=_T("CREATETABLEAPLTb(upcnvarchar(17)PRIMARYKEY,descriptionnvarchar(50),categorynchar(2),subcategorynchar(3),punitnvarchar(10),maxpricenchar(6),ptypenchar(2));");
- bRet&=ExecuteSQL(csSql);
-
-
csSql=_T("INSERTINTOAPLTbVALUES('TestUPC1','JustForTest1','1','1-1','Unit1','40.25','1');");
- bRet&=ExecuteSQL(csSql);
-
csSql=_T("INSERTINTOAPLTbVALUES('TestUPC2','JustForTest2','2','2-1','Unit2','2.01','2');");
- bRet&=ExecuteSQL(csSql);
-
csSql=_T("INSERTINTOAPLTbVALUES('TestUPC3','JustForTest3','3','3-1','Unit3','1.2','1');");
- bRet&=ExecuteSQL(csSql);
-
-
returnbRet;
- }
-
BOOLCDBManage::InitPriceTable()
- {
-
BOOLbRet=TRUE;
-
-
CStringcsSql=_T("DROPTablePriceTb");
- ExecuteSQL(csSql);
-
-
csSql=_T("CREATETABLEPriceTb(upcnchar(17)PRIMARYKEY,pricenchar(6));");
- bRet&=ExecuteSQL(csSql);
-
-
-
csSql=_T("INSERTINTOPriceTbVALUES('a1b2c3d4','12.34');");
- bRet&=ExecuteSQL(csSql);
-
csSql=_T("INSERTINTOPriceTbVALUES('TestUPC1','34.45');");
- bRet&=ExecuteSQL(csSql);
-
csSql=_T("INSERTINTOPriceTbVALUES('TestUPC2','0.45');");
- bRet&=ExecuteSQL(csSql);
-
-
returnbRet;
- }
-
BOOLCDBManage::InitTransTable()
- {
-
BOOLbRet=TRUE;
-
-
CStringcsSql=_T("DROPTableTransTb");
- ExecuteSQL(csSql);
-
-
csSql=_T("CREATETABLETransTb(traceidnchar(6)PRIMARYKEY,msgtypenchar(4),amountnchar(12),uidnchar(4),transdatenchar(6),transtimenchar(6),aiicodenvarchar(12));");
- bRet&=ExecuteSQL(csSql);
-
-
csSql=_T("INSERTINTOTransTbVALUES('001','1','10','1234','081018','143302','0810181433');");
- bRet&=ExecuteSQL(csSql);
-
csSql=_T("INSERTINTOTransTbVALUES('002','2','20','1234','061018','143366','0610181433');");
- bRet&=ExecuteSQL(csSql);
-
csSql=_T("INSERTINTOTransTbVALUES('003','3','30','1234','081018','143100','0810181431');");
- bRet&=ExecuteSQL(csSql);
-
-
returnbRet;
- }
-
BOOLCDBManage::InitUpdateTable()
- {
-
BOOLbRet=TRUE;
-
-
CStringcsSql=_T("DROPTableUpdateTb");
- ExecuteSQL(csSql);
-
-
csSql=_T("CREATETABLEUpdateTb(tidnchar(2)PRIMARYKEY,tnamenvarchar(20),lupdatenchar(6),luptimenchar(6));");
- bRet&=ExecuteSQL(csSql);
-
returnbRet;
- }
-
BOOLCDBManage::AnalyzeBalance(BIItembiInput,Balance*balOutput)
- {
-
-
-
- CStringcsSQL;
-
WCHARwcCategory[2];
-
WCHARwcSubCategory[3];
- VARIANTvarUPC;
- VARIANTvarUnit;
- VARIANTvarDescription;
- VariantInit(&varUPC);
- VariantInit(&varUnit);
- VariantInit(&varDescription);
-
BOOLbRet=TRUE;
-
DWORDdwNum;
-
charTempArray[50];
-
if(balOutput==NULL)
-
returnFALSE;
-
memcpy(TempArray,biInput.byCategory,sizeof(biInput.byCategory));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcCategory,dwNum);
-
memcpy(TempArray,biInput.bySubCategory,sizeof(biInput.bySubCategory));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcSubCategory,dwNum);
-
csSQL.Format(_T("SELECT*FROMAPLTbWHEREcategory='%s'ANDsubcategory='%s';"),wcCategory,wcSubCategory);
-
MessageBox(NULL,csSQL,_T("OpenRecordset"),MB_OK);
-
- bRet&=OpenRecordset(csSQL);
-
if(GetRecordCount(csSQL)==0)
- {
-
return(bRet&=FALSE);
- }
-
else
- {
- MoveFirst();
-
varUPC=GetCollect(_T("upc"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,varUPC.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,varUPC.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
-
-
-
- memcpy(balOutput->szItemUPC,TempArray,dwNum);
-
-
-
-
-
MessageBox(NULL,varUPC.bstrVal,_T("OpenRecordset"),MB_OK);
-
varUnit=GetCollect(_T("punit"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,varUnit.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,varUnit.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
-
-
-
MessageBox(NULL,varUnit.bstrVal,_T("OpenRecordset"),MB_OK);
-
varDescription=GetCollect(_T("description"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,varDescription.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,varDescription.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
-
-
-
MessageBox(NULL,varDescription.bstrVal,_T("OpenRecordset"),MB_OK);
-
-
-
-
-
- }
-
returnbRet;
- }
-
BOOLCDBManage::GetItemFromUPC(CStringcsUPC,ItemList*ilOutput)
- {
- CStringcsSql;
-
BOOLbRet=TRUE;
-
if(csUPC.GetLength()>=17)
- {
-
returnFALSE;
- }
-
csSql.Format(_T("SELECT*FROMAPLTb,PriceTbWHEREAPLTB.upc=PriceTb.upcANDAPLTB.upc='%s';"),csUPC);
- bRet&=OpenRecordset(csSql);
-
if(GetRecordCount(csSql)==0)
- {
-
returnFALSE;
- }
-
else
- {
-
- }
-
returnbRet;
- }
-
BOOLCDBManage::GetItemFromCategory(CStringcsCategory,CStringcsSubcategory,Balance*balOutput,EndBalance*ebalOutput)
- {
-
BOOLbRet=TRUE;
-
returnbRet;
- }
-
BOOLCDBManage::SetItemPrice(CStringcsUpc,CStringcsPrice)
- {
-
BOOLbRet=TRUE;
- CStringcsSQL;
-
if((csUpc.GetLength()>17)||(csPrice.GetLength()>6))
- {
-
returnFALSE;
- }
-
-
-
-
-
csSQL.Format(_T("UPDATEPriceTbSETprice='%s'WHEREupc='%s';"),csPrice,csUpc);
- bRet&=ExecuteSQL(csSQL);
-
-
csSQL.Format(_T("SELECT*FROMPriceTbWHEREupc='%s'ANDprice='%s';"),csUpc,csPrice);
-
if(GetRecordCount(csSQL)==0)
- {
- bRet&=FALSE;
- }
-
returnbRet;
- }
-
BOOLCDBManage::CheckPwdData(CStringcsUid,CStringcsPwd)
- {
-
BOOLbRet=TRUE;
- CStringcsSql;
-
if((csUid.GetLength()>6)||(csPwd.GetLength()>6))
- {
-
returnFALSE;
- }
-
csSql.Format(_T("SELECTuidFROMUserTbWHEREuid='%s'ANDpwd='%s';"),csUid,csPwd);
-
-
if(GetRecordCount(csSql)==0)
- {
- bRet&=FALSE;
- }
-
returnbRet;
- }
-
BOOLCDBManage::CheckParamData(){BOOLbRet=TRUE;returnbRet;}
-
BOOLCDBManage::CheckCardData(){BOOLbRet=TRUE;returnbRet;}
-
BOOLCDBManage::CheckResponseCode(){BOOLbRet=TRUE;returnbRet;}
-
BOOLCDBManage::CheckUPC(){BOOLbRet=TRUE;returnbRet;}
-
BOOLCDBManage::CheckNSF(){BOOLbRet=TRUE;returnbRet;}
-
BOOLCDBManage::CheckAmountData(){BOOLbRet=TRUE;returnbRet;}
-
BOOLCDBManage::CheckCountData(){BOOLbRet=TRUE;returnbRet;}
-
BOOLCDBManage::GetLastTransData(LastTransaction*ltGet)
- {
- VARIANTvTraceid;
- VARIANTvMsgtype;
- VARIANTvAmount;
- VARIANTvUid;
- VARIANTvTransdate;
- VARIANTvTranstime;
- VARIANTvAiicode;
- VariantInit(&vTraceid);
- VariantInit(&vMsgtype);
- VariantInit(&vAmount);
- VariantInit(&vUid);
- VariantInit(&vTransdate);
- VariantInit(&vTranstime);
- VariantInit(&vAiicode);
-
BOOLbRet=TRUE;
-
charTempArray[20];
-
LONGlRcdSize;
-
CStringcsSql=_T("SELECT*FROMTransTb;");
-
DWORDdwNum;
-
if(ltGet==NULL)
-
returnFALSE;
-
-
-
- bRet&=OpenRecordset(csSql);
-
if((lRcdSize=GetRecordCount(csSql))==0)
- {
-
return(bRet&=FALSE);
- }
-
else
- {
- MoveFirst();
-
for(longi=0;i<lRcdSize-1;i++)
-
- {
- MoveNext();
- }
-
-
-
vTraceid=GetCollect(_T("traceid"));
-
dwNum=WideCharToMultiByte(CP_OEMCP,NULL,vTraceid.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,vTraceid.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
- memcpy(ltGet->TraceNum,TempArray,dwNum);
-
vMsgtype=GetCollect(_T("msgtype"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,vMsgtype.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,vMsgtype.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
- memcpy(ltGet->byMsgType,TempArray,dwNum);
-
vAmount=GetCollect(_T("amount"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,vAmount.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,vAmount.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
- memcpy(ltGet->byTransAmount,TempArray,dwNum);
-
vUid=GetCollect(_T("uid"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,vUid.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,vUid.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
- memcpy(ltGet->byCashierID,TempArray,dwNum);
-
vTransdate=GetCollect(_T("transdate"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,vTransdate.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,vTransdate.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
- memcpy(ltGet->byLocalTransDate,TempArray,dwNum);
-
vTranstime=GetCollect(_T("transtime"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,vTranstime.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,vTranstime.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
- memcpy(ltGet->byLocalTransTime,TempArray,dwNum);
-
vAiicode=GetCollect(_T("aiicode"));
- dwNum=WideCharToMultiByte(CP_OEMCP,NULL,vAiicode.bstrVal,-1,NULL,0,NULL,FALSE);
- WideCharToMultiByte(CP_OEMCP,NULL,vAiicode.bstrVal,-1,TempArray,dwNum,NULL,FALSE);
- memcpy(ltGet->byAcquirerCode,TempArray,dwNum);
- }
-
returnbRet;
- }
-
-
-
BOOLCDBManage::SetLastTransData(LastTransactionltSet)
- {
-
WCHARwcTraceNum[6];
-
WCHARwcMsgType[4];
-
WCHARwcTransAmount[12];
-
WCHARwcCashierID[4];
-
WCHARwcLTDate[6];
-
WCHARwcLTTime[6];
-
WCHARwcAcquirerCode[12];
-
-
-
-
-
-
-
-
charTempArray[20];
-
BOOLbRet=TRUE;
- CStringcsSQL;
-
DWORDdwNum;
-
memcpy(TempArray,ltSet.TraceNum,sizeof(ltSet.TraceNum));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcTraceNum,dwNum);
-
memcpy(TempArray,ltSet.byMsgType,sizeof(ltSet.byMsgType));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcMsgType,dwNum);
-
memcpy(TempArray,ltSet.byTransAmount,sizeof(ltSet.byTransAmount));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcTransAmount,dwNum);
-
memcpy(TempArray,ltSet.byCashierID,sizeof(ltSet.byCashierID));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcCashierID,dwNum);
-
memcpy(TempArray,ltSet.byLocalTransDate,sizeof(ltSet.byLocalTransDate));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcLTDate,dwNum);
-
memcpy(TempArray,ltSet.byLocalTransTime,sizeof(ltSet.byLocalTransTime));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcLTTime,dwNum);
-
memcpy(TempArray,ltSet.byAcquirerCode,sizeof(ltSet.byAcquirerCode));
- dwNum=MultiByteToWideChar(CP_ACP,0,TempArray,-1,NULL,0);
- MultiByteToWideChar(CP_ACP,0,TempArray,-1,wcAcquirerCode,dwNum);
-
csSQL.Format(_T("INSERTINTOTransTbVALUES('%s','%s','%s','%s','%s','%s','%s');"),
- wcTraceNum,
- wcMsgType,
- wcTransAmount,
- wcCashierID,
- wcLTDate,
- wcLTTime,
- wcAcquirerCode);
- bRet&=ExecuteSQL(csSQL);
-
-
csSQL.Format(_T("SELECT*FROMTransTbWHEREtraceid='%s';"),wcTraceNum);
-
if(GetRecordCount(csSQL)==0)
- {
- bRet&=FALSE;
- }
-
returnbRet;
- }
分享到:
Global site tag (gtag.js) - Google Analytics
相关推荐
例如,`DBRSD.h` 可能包含了`DBRSD.cpp`的类定义,而`DBManager.h`包含了`DBManager.cpp`的接口声明。 这个DEMO项目对于初学者理解数据库操作原理和实践是非常有价值的,因为它提供了实际的代码示例,涵盖了从连接...
- 数据库连接和操作的类文件(如`DBManager.cpp`, `DBManager.h`) - 用户界面的对话框和窗口类文件(如`AddBookDialog.cpp`, `AddBookDialog.h`) - 业务逻辑处理的函数或类文件(如`BorrowFunction.cpp`, `...
将DBManager.h导入AppDelegate并在didFinishLaunchingWithOptions中调用以下方法。 [DBManager copyDatabaseIfNeeded ]; 如何使用 建立表格 NSMutableDictionary *data = [[ NSMutableDictionary alloc ] init ]; ...
- "sqlite3.c"和"sqlite3.h"是SQLite的源代码文件,其中"sqlite3.c"包含了SQLite的核心功能实现,"sqlite3.h"则定义了相关的API接口。 - "main.cpp"可能是整个项目的主程序,它将调用SQLite的API进行数据库操作,...
3. **DBManager.cpp/h**:这些文件涉及到数据库管理。DBManager可能是一个用于处理数据存储和检索的类,它可能使用QSqlDatabase模块来连接和操作数据库。我们可以在这里实现SQL查询,数据插入、更新和删除等功能。 ...
例如,可以创建一个DBManager类,包含连接、执行SQL、关闭连接等方法,以及异常处理机制。 总的来说,"c++ mysql 引用包"提供了在C++项目中与MySQL数据库交互的基础,开发者可以通过这些头文件实现对数据库的读写...
3. **Singleton类**:在提供的描述中提到了`Singleton.h`和`SingletonCallOnce.h`,这是实现单例模式的头文件。通常,单例类包含一个私有的构造函数和一个静态方法,该方法返回单例的实例。这样,用户就不能通过常规...
if (dbManager.addBook(title, author)) { QMessageBox::information(this, "Success", "Book added successfully."); } else { QMessageBox::critical(this, "Error", "Failed to add book."); } } } ``` ##...
2. **Yii2 的RBAC组件**:Yii2内置了`yii\rbac\DbManager`,它使用数据库来存储RBAC数据。这个组件允许动态地创建、分配和管理角色、任务和权限。 3. **创建RBAC结构**:使用`yii\rbac\ManagerInterface`提供的方法...
3. 通过编译IDL文件,生成C语言的头文件和源文件,如`mathservice.h`、`mathservice_s.c`和`mathservice_c.c`。 4. 在服务器端编写实现服务的程序,并将其编译为可执行文件,如`mathservice.exe`。 5. 在客户端编写...
首先,使用 mysql-connector-java-5[1].0.8.zip 驱动包,编写 DBmanager 类,访问 mysql 数据库,实现创建表、录入成绩、查询成绩等操作。然后,编写客户端程序,调用服务端提供的数据库操作。 3. 服务器和客户端不...
#import <sqlite3.h> ``` 接下来,我们创建一个名为`DBManager`的单例类,用于管理数据库的连接和操作。这个类可以包含以下方法: 1. 初始化数据库: - `+ (void)setupDatabaseWithPath:(NSString *)databasePath...