怎么用vc调用SQL Server写的存储过程啊！
谁有关于用vc调用SQL Server写的存储过程的详细质料以及用vc通过ado操作SQL Server的详细质料，给我一份吧，万分感激！！！ 问题点数：100、回复次数：7Top
1 楼yaya_jan（yaya）回复于 2005-08-17 13:12:07 得分 10
HRESULT hr; ///设定一个句柄
_ConnectionPtr pConnection; ///一个连接指针
CString strSQLConnect = ((CManagerSys1App*)AfxGetApp())->m_strConnectMaster;
try
{
hr = pConnection.CreateInstance("ADODB.Connection");///创建Connection对象
if(SUCCEEDED(hr))
{
hr = pConnection->Open((_bstr_t)strSQLConnect,"","",adModeUnknown); ///连接数据
_variant_t RecordsAffected;
CString strDBName = ((CManagerSys1App*)AfxGetApp())->m_strDBName;
CString strKill;
strKill.Format("exec p_killspid '%s'",strDBName); //kill all connected link
pConnection->Execute((_bstr_t)strKill,&RecordsAffected,adCmdText);
CString strBackup;
strBackup.Format("restore database %s from disk='",strDBName); //restore
strBackup += "C:\\temp.bak";
strBackup += "' with replace";
pConnection->Execute((_bstr_t)strBackup,&RecordsAffected,adCmdText);
}
}
catch(_com_error e)///捕捉异常
{
CString errormessage;
errormessage.Format("全系统数据恢复失败!\r\n错误信息:%s",e.ErrorMessage());
AfxMessageBox(errormessage);///显示错误信息
///关闭数据库连接
if((pConnection != NULL))
{
if(pConnection->State)
pConnection->Close();
pConnection = NULL;
}
return;
}Top
2 楼yaya_jan（yaya）回复于 2005-08-17 13:16:39 得分 5
这是一段恢复数据库的代码。
p_killspid是断开所有连接到要恢复的数据的连接的存储过程。
ADO的详细使用自己找吧。
注意：发布的时候，要包含微软的MDAC
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3 楼Jarrylogin（正经事情我不会,歪门邪道样样行）回复于 2005-08-17 13:18:52 得分 5
SQL Server, stored procedure , Command , Recordset, input parameter, output parameter, returned recordset from stored procedure
//execute stored procedure , get returned value, output value, and returned recordset.
#include "stdafx.h"
#import "C:\PROGRA~1\COMMON~1\System\ado\msado15.dll" rename( "EOF", "adoEOF" )
struct InitOle
{
InitOle() { ::CoInitialize(NULL); }
~InitOle() { ::CoUninitialize(); }
} _init_InitOle_;
void PrintProviderError(ADODB::_ConnectionPtr pConnection);
int main(int argc, char* argv[])
{
printf("Create a adParamReturnValue for Command object to get return value of stored procedure\n");
printf("Reference :MSDN---Append and CreateParameter Methods Example (VC++)\n");
ADODB::_ConnectionPtr Conn1;
ADODB::_CommandPtr Cmd1;
ADODB::_RecordsetPtr Rs1;
ADODB::_ParameterPtr retParam= NULL;
ADODB::_ParameterPtr inParam=NULL;
ADODB::_ParameterPtr outParam=NULL;
_variant_t vtEmpty (DISP_E_PARAMNOTFOUND, VT_ERROR);
_variant_t vtEmpty2 (DISP_E_PARAMNOTFOUND, VT_ERROR);
_bstr_t bstrConnect( L"driver={sql server};server=Cell;Database=zhg;UID=sa;PWD=;" );
// the following stored procedure return 12345 int value
_bstr_t bstrCreate ( L"create proc sp_AdoTest( @OutParam int OUTPUT,@InParam int ) "
L"as "
L"select @OutParam = @InParam + 10 "
L"select * from Table1"
L"return 12345" );
_bstr_t bstrSP(L"sp_Adotest" );
try
{
_bstr_t bstrEmpty;
Conn1.CreateInstance( __uuidof( ADODB::Connection ) );
Cmd1.CreateInstance( __uuidof( ADODB::Command ) );
Rs1.CreateInstance(__uuidof(ADODB::Recordset));
// Establish connection.
Conn1->ConnectionString = bstrConnect;
Conn1->Open( bstrConnect, bstrEmpty, bstrEmpty, -1 );
// Open recordset.
Cmd1->ActiveConnection = Conn1;
Cmd1->CommandText = bstrSP;
Cmd1->CommandType = ADODB::adCmdStoredProc;
retParam=Cmd1->CreateParameter(_bstr_t("Return"),ADODB::adInteger,ADODB::adParamReturnValue,sizeof(int));
Cmd1->Parameters->Append(retParam);
outParam = Cmd1->CreateParameter(_bstr_t("OutParam"),ADODB::adInteger,ADODB::adParamOutput,sizeof(int));
Cmd1->Parameters->Append(outParam);
inParam = Cmd1->CreateParameter(_bstr_t("InParam"),ADODB::adInteger,ADODB::adParamInput,sizeof(int),_variant_t( (long) 10 ));
inParam->Value=_variant_t( (long) 10 );
Cmd1->Parameters->Append(inParam);
Cmd1->Parameters->Refresh();
Cmd1->Parameters->Item[ _variant_t( _bstr_t("@InParam") ) ]->Value =_variant_t( (long) 11 );
Rs1->put_CursorLocation(ADODB::adUseClient);
Rs1->Open((_variant_t((IDispatch *) Cmd1)),vtEmpty,ADODB::adOpenStatic,
ADODB::adLockReadOnly, -1);
// Get return value of the stored procedure.adCmdUnknown
TCHAR tcbuf[1024];
long retvalue=Cmd1->Parameters->Item[(short)0]->Value;
long p2=Cmd1->Parameters->Item[(short)1]->Value;
long p3=Cmd1->Parameters->Item[(short)2]->Value;
int recordcount=0;
if(Rs1->State==ADODB::adStateClosed)
MessageBox(NULL,"no recordset is returned from the stored procedure","Information",MB_OK);
else
recordcount = Rs1->GetRecordCount();
wsprintf(tcbuf,"retvalue of the stored procedure:%d,input value:%d,output value:%d,record count :%d",retvalue,p2,p3,recordcount);
MessageBox(NULL,tcbuf,"Output",MB_OK);
}
catch(_com_error &e)
{
_bstr_t bstrSource(e.Source());
_bstr_t bstrDescription(e.Description());
printf("\nCOM error occurred, Source : %s \n Description : %s \n",(LPCSTR)bstrSource,(LPCSTR)bstrDescription);
PrintProviderError(Conn1);
}
return 0;
}
VOID PrintProviderError(ADODB::_ConnectionPtr pConnection)
{
// Print Provider Errors from Connection object.
// pErr is a record object in the Connection's Error collection.
ADODB::ErrorPtr pErr = NULL;
long nCount = 0;
long i = 0;
if( (pConnection->Errors->Count) > 0)
{
nCount = pConnection->Errors->Count;
// Collection ranges from 0 to nCount -1.
for(i = 0; i < nCount; i++)
{
pErr = pConnection->Errors->GetItem(i);
printf("\n\t Error number: %x\t%s", pErr->Number, (LPCSTR)pErr->Description);
}
}
}
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4 楼bohut（●伯虎● ）回复于 2005-08-17 13:19:30 得分 50
使用ADO调用存储过程
在ADO中调用存储过程一直是一个困扰大家的问题。其实，关于ADO调用存储过程的方法在很多书中都有讲到，标准的做法无非是按照以下步骤进行：
1、生成并初始化一个_CommandPtr对象；
2、生成调用存储过程需要的参数，这些参数都是_ParameterPtr对象；
3、按照顺序将使用_CommandPtr的Append方法为存储过程提供参数（包括输入参数和输出参数）；
4、为_CommandPtr对象指定需要使用的ADO连接；
5、使用_CommandPtr的Execute方法调用存储过程；
6、从结果中获取返回参数的值（如果有的话）。
具体的过程在此我不详细描述，我想看看本文附带的代码就应该很明白了。
在这里我想就我使用ADO调用存储过程时的一些体会说明一下。
1、关于CreateParameter函数
该函数的原型为：CreateParameter (Name, Type, Direction, Size, Value)
其中Name是参数的名称，可以指定也可以不指定； Type是一个DataTypeEnum值，指定参数的类别，取值有adInteger（整型）、adChar（字符/字符
串型）等； Direction是一个ParameterDirectionEnum值，其取值为adParamInput、adParamInputOutput、 adParamOutput、adParamReturnValue、
adParamUnknown； Size是一个Long类型的值，指示该参数值以字节计算的最大长度，例如对int型，该值可以取为sizeof(int)， 对Long型，该值可
以取为sizeof(long)，对字符串型，可以使用该字符串的长度； Value是一个variant类型的值，是该参数的取值。
在这里需要注意的是，Type参数、Direction参数以及Size参数一定要和存储过程定义时的参数相吻合，
例如，如果有下面一个存储过程 CREATE PROCEDURE SMS_Proc_Handle_All (@UserID Integer, @SourAddr Varchar(15), @DestAddr
varchar(5000), @AvValue Single output, @ReturnInfo varchar(100) output ) 则Type参数的取值依次为adInteger、adChar、adChar、
adSingle，adChar； Direction参数的取值依次为adParameterIn、adParameterIn、adParameterIn、adParameterOut、adParameterOut； 对于输入
参数，Size的值可以根据实际数值来定，对于输出参数，最好是根据定义确定（上例中ReturnInfo参数的 Size值可以取为100）。
2，关于获取Output的参数
获取ourput参数是大家最关注的问题，同时也是最“难”的问题，因为按照书本上的写法，经常获得不了 Output参数，其实这个问题很容易解决
：在调用_CommandPtr的Execute方法时，写成 cmmd->Execute(NULL, NULL, adCmdStoredProc); 而不要写成 RecordsetPtr rec = cmmd->Execute
(NULL, NULL, adCmdStoredProc); 也就是说，不取返回值（我不知道这是为什么，但是相信我，事情就是这样）。 这句执行完后，使用 cmmd-
>Parameters->GetItem("XXXXXX")->GetValue(); ^^^^^^^ 输出参数的名称 就可以获得输出参数
的值了。
以下是一个通过ADO调用存储过程的部分代码：
_CommandPtr cmmd;
HRESULT hr = cmmd.CreateInstance(__uuidof(Command));
if(FAILED(hr))
{
AfxMessageBox("NewNetDatabase()中创建_CommandPtr对象失败");
return 0;
}
_ParameterPtr param;
param = cmmd->CreateParameter(""/*NetType*/,adTinyInt, adParamInput,sizeof(BYTE),(BYTE)(m_nNetType+1));
cmmd->Parameters->Append(param);
param = cmmd->CreateParameter(""/*Name*/,adVarChar, adParamInput,m_strName.GetLength()+1, _variant_t(m_strName));
cmmd->Parameters->Append(param);
param = cmmd->CreateParameter(""/*Desp*/,adVarChar, adParamInput,m_strDesp.GetLength()+1, _variant_t(m_strDesp));
cmmd->Parameters->Append(param);
param = cmmd->CreateParameter("NewNetID"/*NetID*/,adInteger, adParamOutput,sizeof(long), (long)m_nNewNetID);//返回参数，返回新建的网
络的ID cmmd->Parameters->Append(param);
cmmd->CommandText=_bstr_t("GSDT_NewNet");//存储过程的名称
cmmd->ActiveConnection = m_pConPtr;//需要使用的ADO连接
cmmd->CommandType=adCmdStoredProc; //注意下面的一行代码，如果你写成这样，就获得不了返回参数的值 //_RecordsetPtr rec = cmmd-
>Execute(NULL, NULL, adCmdStoredProc); //我不知道这是为什么，但事实就是这样：）
cmmd->Execute(NULL, NULL, adCmdStoredProc); m_nNewNetID=(long)cmmd->Parameters->GetItem("NewNetID")->GetValue();//通过参数返回值
cmmd.Detach();
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5 楼Jarrylogin（正经事情我不会,歪门邪道样样行）回复于 2005-08-17 13:19:42 得分 10
/ SQL Server, stored procedure , Command , Recordset, input parameter, output parameter, returned recordset from stored procedure
//execute stored procedure , get returned value, output value, and returned recordset.
#include "stdafx.h"
#import "C:\PROGRA~1\COMMON~1\System\ado\msado15.dll" rename( "EOF", "adoEOF" )
struct InitOle
{
InitOle() { ::CoInitialize(NULL); }
~InitOle() { ::CoUninitialize(); }
} _init_InitOle_;
void PrintProviderError(ADODB::_ConnectionPtr pConnection);
int main(int argc, char* argv[])
{
printf("Create a adParamReturnValue for Command object to get return value of stored procedure\n");
printf("Reference :MSDN---Append and CreateParameter Methods Example (VC++)\n");
ADODB::_ConnectionPtr Conn1;
ADODB::_CommandPtr Cmd1;
ADODB::_RecordsetPtr Rs1;
ADODB::_ParameterPtr retParam= NULL;
ADODB::_ParameterPtr inParam=NULL;
ADODB::_ParameterPtr outParam=NULL;
_variant_t vtEmpty (DISP_E_PARAMNOTFOUND, VT_ERROR);
_variant_t vtEmpty2 (DISP_E_PARAMNOTFOUND, VT_ERROR);
_bstr_t bstrConnect( L"driver={sql server};server=Cell;Database=zhg;UID=sa;PWD=;" );
// the following stored procedure return 12345 int value
_bstr_t bstrCreate ( L"create proc sp_AdoTest( @OutParam int OUTPUT,@InParam int ) "
L"as "
L"select @OutParam = @InParam + 10 "
L"select * from Table1"
L"return 12345" );
_bstr_t bstrSP(L"sp_Adotest" );
try
{
_bstr_t bstrEmpty;
Conn1.CreateInstance( __uuidof( ADODB::Connection ) );
Cmd1.CreateInstance( __uuidof( ADODB::Command ) );
Rs1.CreateInstance(__uuidof(ADODB::Recordset));
// Establish connection.
Conn1->ConnectionString = bstrConnect;
Conn1->Open( bstrConnect, bstrEmpty, bstrEmpty, -1 );
// Open recordset.
Cmd1->ActiveConnection = Conn1;
Cmd1->CommandText = bstrSP;
Cmd1->CommandType = ADODB::adCmdStoredProc;
retParam=Cmd1->CreateParameter(_bstr_t("Return"),ADODB::adInteger,ADODB::adParamReturnValue,sizeof(int));
Cmd1->Parameters->Append(retParam);
outParam = Cmd1->CreateParameter(_bstr_t("OutParam"),ADODB::adInteger,ADODB::adParamOutput,sizeof(int));
Cmd1->Parameters->Append(outParam);
inParam = Cmd1->CreateParameter(_bstr_t("InParam"),ADODB::adInteger,ADODB::adParamInput,sizeof(int),_variant_t( (long) 10 ));
inParam->Value=_variant_t( (long) 10 );
Cmd1->Parameters->Append(inParam);
Cmd1->Parameters->Refresh();
Cmd1->Parameters->Item[ _variant_t( _bstr_t("@InParam") ) ]->Value =_variant_t( (long) 11 );
Rs1->put_CursorLocation(ADODB::adUseClient);
Rs1->Open((_variant_t((IDispatch *) Cmd1)),vtEmpty,ADODB::adOpenStatic,
ADODB::adLockReadOnly, -1);
// Get return value of the stored procedure.adCmdUnknown
TCHAR tcbuf[1024];
long retvalue=Cmd1->Parameters->Item[(short)0]->Value;
long p2=Cmd1->Parameters->Item[(short)1]->Value;
long p3=Cmd1->Parameters->Item[(short)2]->Value;
int recordcount=0;
if(Rs1->State==ADODB::adStateClosed)
MessageBox(NULL,"no recordset is returned from the stored procedure","Information",MB_OK);
else
recordcount = Rs1->GetRecordCount();
wsprintf(tcbuf,"retvalue of the stored procedure:%d,input value:%d,output value:%d,record count :%d",retvalue,p2,p3,recordcount);
MessageBox(NULL,tcbuf,"Output",MB_OK);
}
catch(_com_error &e)
{
_bstr_t bstrSource(e.Source());
_bstr_t bstrDescription(e.Description());
printf("\nCOM error occurred, Source : %s \n Description : %s \n",(LPCSTR)bstrSource,(LPCSTR)bstrDescription);
PrintProviderError(Conn1);
}
return 0;
}
VOID PrintProviderError(ADODB::_ConnectionPtr pConnection)
{
// Print Provider Errors from Connection object.
// pErr is a record object in the Connection's Error collection.
ADODB::ErrorPtr pErr = NULL;
long nCount = 0;
long i = 0;
if( (pConnection->Errors->Count) > 0)
{
nCount = pConnection->Errors->Count;
// Collection ranges from 0 to nCount -1.
for(i = 0; i < nCount; i++)
{
pErr = pConnection->Errors->GetItem(i);
printf("\n\t Error number: %x\t%s", pErr->Number, (LPCSTR)pErr->Description);
}
}
}
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6 楼goodboyws（深夜不眠者(VCMVP)）回复于 2005-08-17 13:38:19 得分 10
SQL Server安装盘附带的代码有例子，自己找找看Top
7 楼masterz（www.fruitfruit.com）回复于 2005-08-17 14:00:14 得分 10
www.fruitfruit.com/vc/atl/ado.cpp
www.fruitfruit.com/vc/database/oracle.cppTop
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