c++通过ADO对数据库操作

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2024-09-03 16:25:10 218人阅读

C/C++ 通过ADO对数据库操作

实例：c++ 通过ADO调用存储过程写入数据到sql server

1.在.h头文件导入微软提供的ado的动态库

#pragma warning(disable:4146)

#import "C:\\Program Files\\Common Files\\System\\ado\\msado15.dll" named_guids rename("EOF","adoEOF"), rename("BOF","adoBOF")

#pragma warning(default:4146)

using namespace ADODB;

2.编写函数调用存储过程

//保存数据库记录

void SaveDbTran(char *devID,char * traceNo,char *refNo,char *batchNo, char * bankCardNo, char * tranDate, char * tranTime,char * amt,char * hosCardNo,char * hosName,char * hosIDCardNo, char *msg)

{

//2.1创建数据库连接句柄

_ConnectionPtr pMyConnect;

HRESULT hr;

try

{

//2.1.1组建连接数据库字符串

char *dbConStr = new char[400];

strcpy(dbConStr,"Provider=SQLOLEDB;Server=sqlserver服务器地址,1433;Database=数据库名;uid=登陆用户;pwd=登录密码");

CoInitialize(NULL);

Sleep(300);

//2.1.2 句柄实例化实现连接

hr = pMyConnect.CreateInstance("ADODB.Connection");

if(SUCCEEDED(hr))

{

ct.SaveLog("创建数据库连接对象成功，等待打开连接",0,dbConStr);

pMyConnect->Open(_bstr_t(dbConStr),"","",adModeUnknown);

}

else

{

CoUninitialize();

return;

}

catch(_com_error &err)

{

CoUninitialize();

return ;

}

//2.2组建运行命令参数句柄

_CommandPtr m_pCommand;

_RecordsetPtr m_pRecordset;

try

{

//2.2.1 句柄实例化

m_pCommand.CreateInstance(__uuidof(Command));//Command无需改变

m_pCommand->ActiveConnection = pMyConnect;//pMyConnect 为连接数据库句柄

m_pCommand->CommandType = adCmdStoredProc;//adCmdStoredProc无需改变

m_pCommand->CommandText = _bstr_t("p_d_tra");//p_d_tra为存储过程名

//2.2.2 设置给可变参数赋值

_variant_t vv_dotype,vv_TranNo,vv_devID,vv_TranDate,vv_TranTime;

_variant_t vv_RetCode,vv_BusType,vv_CardNo,vv_IDCard,vv_Name;

_variant_t vv_Amt,vv_Notes,vv_SerID,vv_DesCont,vv_tranFlag;

_variant_t vv_bankCardNo,vv_bankGroupNo,vv_bankFlowNo,vv_DevName,vv_ExeCount;

// value to variant

vv_dotype =_variant_t(_bstr_t("1"));

vv_TranNo =_variant_t(_bstr_t(temp_traceNo));

vv_devID =_variant_t(_bstr_t(devID));

vv_TranDate =_variant_t(_bstr_t(datetime));

vv_TranTime =_variant_t(_bstr_t(datetime));

vv_RetCode =_variant_t(_bstr_t(""));

vv_BusType =_variant_t(_bstr_t("14"));

vv_CardNo =_variant_t(_bstr_t(hosCardNo));

vv_IDCard =_variant_t(_bstr_t(hosIDCardNo));

vv_Name = _variant_t(_bstr_t(hosName));

vv_Amt =_variant_t(_bstr_t(amt));

vv_Notes =_variant_t(_bstr_t("交易成功"));

vv_SerID =_variant_t(_bstr_t(""));

vv_DesCont =_variant_t(_bstr_t(""));

vv_tranFlag =_variant_t(_bstr_t("0"));

vv_bankCardNo =_variant_t(_bstr_t(temp_bankCardNo));

vv_bankGroupNo=_variant_t(_bstr_t(batchNo));

vv_bankFlowNo =_variant_t(_bstr_t(refNo));

vv_DevName =_variant_t(_bstr_t(""));

vv_ExeCount = _variant_t(ret_ExeCount);

//2.2.3创建数据库存储过程输入参数

_ParameterPtr mp_dotype,mp_TranNo,mp_devID,mp_TranDate,mp_TranTime;

_ParameterPtr mp_RetCode,mp_BusType,mp_CardNo,mp_IDCard,mp_Name;

_ParameterPtr mp_Amt,mp_Notes,mp_SerID,mp_DesCont,mp_tranFlag;

_ParameterPtr mp_bankCardNo,mp_bankGroupNo,mp_bankFlowNo,mp_DevName,mp_ExeCount;

//2.2.3.1给数据库参数实例化

//create ParameterPtr instance

mp_dotype.CreateInstance(__uuidof(Parameter));

mp_TranNo.CreateInstance(__uuidof(Parameter));

mp_devID.CreateInstance(__uuidof(Parameter));

mp_TranDate.CreateInstance(__uuidof(Parameter));

mp_TranTime.CreateInstance(__uuidof(Parameter));

mp_RetCode.CreateInstance(__uuidof(Parameter));

mp_BusType.CreateInstance(__uuidof(Parameter));

mp_CardNo.CreateInstance(__uuidof(Parameter));

mp_IDCard.CreateInstance(__uuidof(Parameter));

mp_Name.CreateInstance(__uuidof(Parameter));

mp_Amt.CreateInstance(__uuidof(Parameter));

mp_Notes.CreateInstance(__uuidof(Parameter));

mp_SerID.CreateInstance(__uuidof(Parameter));

mp_DesCont.CreateInstance(__uuidof(Parameter));

mp_tranFlag.CreateInstance(__uuidof(Parameter));

mp_bankCardNo.CreateInstance(__uuidof(Parameter));

mp_bankGroupNo.CreateInstance(__uuidof(Parameter));

mp_bankFlowNo.CreateInstance(__uuidof(Parameter));

mp_DevName.CreateInstance(__uuidof(Parameter));

mp_ExeCount.CreateInstance(__uuidof(Parameter));

//2.2.3.2将数据库参数追加到命令变量句柄的参数属性末尾

//append parameterPtr set to _CommandPtr parameters lists

//数据库参数 = 命令变量句柄->创建参数方法（_bstr_t("存储过程参数名")，存储过程参数数据类型，存储过程参数输入输出类型，默认大小，可变参数值）

mp_dotype=m_pCommand->CreateParameter(_bstr_t("dotype"),adInteger,adParamInput,-1,vv_dotype);//整数类型

m_pCommand->Parameters->Append(mp_dotype);

mp_TranNo=m_pCommand->CreateParameter(_bstr_t("TranNo"),adVarChar,adParamInput,32,vv_TranNo); //字符串类型

m_pCommand->Parameters->Append(mp_TranNo);

mp_devID=m_pCommand->CreateParameter(_bstr_t("devID"),adVarChar,adParamInput,20,vv_devID);

m_pCommand->Parameters->Append(mp_devID);

mp_TranDate=m_pCommand->CreateParameter(_bstr_t("TranDate"),adVarChar,adParamInput,25,vv_TranDate);//时间类型

m_pCommand->Parameters->Append(mp_TranDate);

mp_TranTime=m_pCommand->CreateParameter(_bstr_t("TranTime"),adVarChar,adParamInput,25,vv_TranTime);

m_pCommand->Parameters->Append(mp_TranTime);

mp_RetCode=m_pCommand->CreateParameter(_bstr_t("RetCode"),adVarChar,adParamInput,20,vv_RetCode);

m_pCommand->Parameters->Append(mp_RetCode);

mp_BusType=m_pCommand->CreateParameter(_bstr_t("BusType"),adInteger,adParamInput,-1,vv_BusType);

m_pCommand->Parameters->Append(mp_BusType);

mp_CardNo=m_pCommand->CreateParameter(_bstr_t("CardNo"),adVarChar,adParamInput,20,vv_CardNo);

m_pCommand->Parameters->Append(mp_CardNo);

mp_IDCard=m_pCommand->CreateParameter(_bstr_t("IDCard"),adVarChar,adParamInput,20,vv_IDCard);

m_pCommand->Parameters->Append(mp_IDCard);

mp_Name=m_pCommand->CreateParameter(_bstr_t("Name"),adVarChar,adParamInput,10,vv_Name);

m_pCommand->Parameters->Append(mp_Name);

mp_Amt=m_pCommand->CreateParameter(_bstr_t("Amt"),adDecimal,adParamInput,10,vv_Amt);//浮点数类型

mp_Amt->NumericScale = 2; //设置小数点后位数

mp_Amt->Precision = 10; //设置整数位位数

m_pCommand->Parameters->Append(mp_Amt);

mp_Notes=m_pCommand->CreateParameter(_bstr_t("Notes"),adVarChar,adParamInput,2000,vv_Notes);

m_pCommand->Parameters->Append(mp_Notes);

mp_SerID=m_pCommand->CreateParameter(_bstr_t("SerID"),adVarChar,adParamInput,20,vv_SerID);

m_pCommand->Parameters->Append(mp_SerID);

mp_DesCont=m_pCommand->CreateParameter(_bstr_t("DesCont"),adVarChar,adParamInput,2000,vv_DesCont);

m_pCommand->Parameters->Append(mp_DesCont);

mp_tranFlag=m_pCommand->CreateParameter(_bstr_t("tranFlag"),adInteger,adParamInput,-1,vv_tranFlag);

m_pCommand->Parameters->Append(mp_tranFlag);

mp_bankCardNo=m_pCommand->CreateParameter(_bstr_t("bankCardNo"),adVarChar,adParamInput,25,vv_bankCardNo);

m_pCommand->Parameters->Append(mp_bankCardNo);

mp_bankGroupNo=m_pCommand->CreateParameter(_bstr_t("bankGroupNo"),adVarChar,adParamInput,12,vv_bankGroupNo);

m_pCommand->Parameters->Append(mp_bankGroupNo);

mp_bankFlowNo=m_pCommand->CreateParameter(_bstr_t("bankFlowNo"),adVarChar,adParamInput,12,vv_bankFlowNo);

m_pCommand->Parameters->Append(mp_bankFlowNo);

mp_DevName=m_pCommand->CreateParameter(_bstr_t("DevName"),adVarChar,adParamInput,40,vv_DevName);

m_pCommand->Parameters->Append(mp_DevName);

mp_ExeCount=m_pCommand->CreateParameter(_bstr_t("ExeCount"),adInteger,adParamOutput,-1,vv_ExeCount);//输出类型

m_pCommand->Parameters->Append(mp_ExeCount);

//2.2.4 执行得到结果

_variant_t vNull;

vNull.vt = VT_ERROR;

vNull.scode = DISP_E_PARAMNOTFOUND;

//2.2.4.1执行数据库存储过程

m_pRecordset = m_pCommand->Execute(&vNull,&vNull,adCmdStoredProc);//adCmdStoredProc不要改变

//m_pRecordset执行SQL结果可对其进行判断确定成功，错误原因

if (mp_ExeCount->Value != 0)

{

ct.SaveLog("插入数据失败",0,"");

}

else

{

ct.SaveLog("插入数据成功",0,"");

}

catch(_com_error &err)

{

if(pMyConnect->State) pMyConnect->Close();

pMyConnect = NULL;

CoUninitialize();

}

//2.2.5 关闭连接释放资源

if(pMyConnect->State) pMyConnect->Close();

pMyConnect = NULL;

CoUninitialize(); //切记成功与否都要调用以释放资源

return ;

}

本文出自 “诗意生活” 博客，请务必保留此出处http://whish.blog.51cto.com/10679902/1896409

c++通过ADO对数据库操作

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c++通过ADO对数据库操作

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