给你个C++链接SQL2000的例子! /************************************************** * 操作系统 Windows XP Professional SP2 * 开发环境 Visual Studio.NET 2003 * 数据库 SQL Server 2000 * 注释 配置环境,可以参考代码中的ConnectionString赋值部分 * 另外对于SQL SERVER的密码和用户名得修改一下程序的用户名和密码 * 这个程序用的是SQL SERVER的默认例子数据库,除了用户名和密码,代码基本不用怎么改 * 你多注意一下你的环境比如ODBC呀,数据库的用户名呀,口令呀,还有 * 操作系统,数据库,程序,三方面的配合吧。 **************************************************/ // BeingConnectionStringCpp #import "C:\Program Files\Common Files\System\ADO\msado15.dll" \ no_namespace rename("EOF", "EndOfFile") #include <ole2.h> #include <stdio.h> #include <conio.h> // Function declarations inline void TESTHR(HRESULT x) {if FAILED(x) _com_issue_error(x);}; void ConnectionStringX(); _bstr_t GetState(int intState); void PrintProviderError(_ConnectionPtr pConnection); void PrintComError(_com_error &e); /////////////////////////////////////////////////////////// // // // Main Function // // // /////////////////////////////////////////////////////////// void main() { if(FAILED(::CoInitialize(NULL))) return; ConnectionStringX(); //Wait here for user to see the output.. printf("\nPress any key to continue..."); getch(); ::CoUninitialize(); } /////////////////////////////////////////////////////////// // // // ConnectionStringX Function // // // /////////////////////////////////////////////////////////// void ConnectionStringX() { // Define Connection object pointers. // Initialize pointers on define. // These are in the ADODB:: namespace _ConnectionPtr pConnection1 = NULL; _ConnectionPtr pConnection2 = NULL; _ConnectionPtr pConnection3 = NULL; _ConnectionPtr pConnection4 = NULL; //Define Other Variables HRESULT hr = S_OK; try { // Open a connection using OLE DB syntax. TESTHR(pConnection1.CreateInstance(__uuidof(Connection))); pConnection1->ConnectionString = "Provider='sqloledb';Data Source='MySqlServer';" "Initial Catalog='Pubs';Integrated Security='SSPI';"; pConnection1->ConnectionTimeout = 30; pConnection1->Open("","","",adConnectUnspecified); printf("cnn1 state: %s\n", (LPCTSTR)GetState(pConnection1->State)); // Open a connection using a DSN and ODBC tags. // It is assumed that you have create DSN 'Pubs' with a user name as // 'MyUserId' and password as 'MyPassword'. TESTHR(pConnection2.CreateInstance(__uuidof(Connection))); pConnection2->ConnectionString = "DSN=Pubs;UID=MyUserId;PWD=MyPassword;"; pConnection2->Open("","","",adConnectUnspecified); printf("cnn2 state: %s\n", (LPCTSTR)GetState(pConnection2->State)); // Open a connection using a DSN and OLE DB tags. TESTHR(pConnection3.CreateInstance(__uuidof(Connection))); pConnection3->ConnectionString = "Data Source=Pubs;"; pConnection3->Open("","","",adConnectUnspecified); printf("cnn3 state: %s\n", (LPCTSTR)GetState(pConnection3->State)); // Open a connection using a DSN and individual // arguments instead of a connection string. // It is assumed that you have create DSN 'Pubs' with a user name as // 'MyUserId' and password as 'MyPassword'. TESTHR(pConnection4.CreateInstance(__uuidof(Connection))); pConnection4->Open("Pubs","MyUserId","MyPassword",adConnectUnspecified); printf("cnn4 state: %s\n", (LPCTSTR)GetState(pConnection4->State)); } catch(_com_error &e) { // Notify user of any errors. // Pass a connection pointer accessed from the Connection. PrintProviderError(pConnection1); if(pConnection2) PrintProviderError(pConnection2); if(pConnection3) PrintProviderError(pConnection3); if(pConnection4) PrintProviderError(pConnection4); PrintComError(e); } //Cleanup objects before exit. if (pConnection1) if (pConnection1->State == adStateOpen) pConnection1->Close(); if (pConnection2) if (pConnection2->State == adStateOpen) pConnection2->Close(); if (pConnection3) if (pConnection3->State == adStateOpen) pConnection3->Close(); if (pConnection4) if (pConnection4->State == adStateOpen) pConnection4->Close(); } /////////////////////////////////////////////////////////// // // // GetState Function // // // /////////////////////////////////////////////////////////// _bstr_t GetState(int intState) { _bstr_t strState; switch(intState) { case adStateClosed: strState = "adStateClosed"; break; case adStateOpen: strState = "adStateOpen"; break; default: ; } return strState; } /////////////////////////////////////////////////////////// // // // PrintProviderError Function // // // /////////////////////////////////////////////////////////// void PrintProviderError(_ConnectionPtr pConnection) { // Print Provider Errors from Connection object. // pErr is a record object in the Connection's Error collection. ErrorPtr pErr = NULL; if( (pConnection->Errors->Count) > 0) { long nCount = pConnection->Errors->Count; // Collection ranges from 0 to nCount -1. for(long i = 0; i < nCount; i++) { pErr = pConnection->Errors->GetItem(i); printf("Error number: %x\t%s\n", pErr->Number, (LPCSTR)pErr->Description); } } } /////////////////////////////////////////////////////////// // // // PrintComError Function // // // /////////////////////////////////////////////////////////// void PrintComError(_com_error &e) { _bstr_t bstrSource(e.Source()); _bstr_t bstrDescription(e.Description()); // Print Com errors. printf("Error\n"); printf("\tCode = %08lx\n", e.Error()); printf("\tCode meaning = %s\n", e.ErrorMessage()); printf("\tSource = %s\n", (LPCSTR) bstrSource); printf("\tDescription = %s\n", (LPCSTR) bstrDescription); } // EndConnectionStringCpp
/**************************************************
* 操作系统 Windows XP Professional SP2
* 开发环境 Visual Studio.NET 2003
* 数据库 SQL Server 2000
* 注释 配置环境,可以参考代码中的ConnectionString赋值部分
* 另外对于SQL SERVER的密码和用户名得修改一下程序的用户名和密码
* 这个程序用的是SQL SERVER的默认例子数据库,除了用户名和密码,代码基本不用怎么改
* 你多注意一下你的环境比如ODBC呀,数据库的用户名呀,口令呀,还有
* 操作系统,数据库,程序,三方面的配合吧。
**************************************************/
// BeingConnectionStringCpp
#import "C:\Program Files\Common Files\System\ADO\msado15.dll" \
no_namespace rename("EOF", "EndOfFile") #include <ole2.h>
#include <stdio.h>
#include <conio.h> // Function declarations
inline void TESTHR(HRESULT x) {if FAILED(x) _com_issue_error(x);};
void ConnectionStringX();
_bstr_t GetState(int intState);
void PrintProviderError(_ConnectionPtr pConnection);
void PrintComError(_com_error &e); ///////////////////////////////////////////////////////////
// //
// Main Function //
// //
/////////////////////////////////////////////////////////// void main()
{
if(FAILED(::CoInitialize(NULL)))
return; ConnectionStringX(); //Wait here for user to see the output..
printf("\nPress any key to continue...");
getch(); ::CoUninitialize();
} ///////////////////////////////////////////////////////////
// //
// ConnectionStringX Function //
// //
/////////////////////////////////////////////////////////// void ConnectionStringX()
{
// Define Connection object pointers.
// Initialize pointers on define.
// These are in the ADODB:: namespace
_ConnectionPtr pConnection1 = NULL;
_ConnectionPtr pConnection2 = NULL;
_ConnectionPtr pConnection3 = NULL;
_ConnectionPtr pConnection4 = NULL; //Define Other Variables
HRESULT hr = S_OK; try
{
// Open a connection using OLE DB syntax.
TESTHR(pConnection1.CreateInstance(__uuidof(Connection)));
pConnection1->ConnectionString =
"Provider='sqloledb';Data Source='MySqlServer';"
"Initial Catalog='Pubs';Integrated Security='SSPI';";
pConnection1->ConnectionTimeout = 30;
pConnection1->Open("","","",adConnectUnspecified);
printf("cnn1 state: %s\n",
(LPCTSTR)GetState(pConnection1->State)); // Open a connection using a DSN and ODBC tags.
// It is assumed that you have create DSN 'Pubs' with a user name as
// 'MyUserId' and password as 'MyPassword'.
TESTHR(pConnection2.CreateInstance(__uuidof(Connection)));
pConnection2->ConnectionString = "DSN=Pubs;UID=MyUserId;PWD=MyPassword;";
pConnection2->Open("","","",adConnectUnspecified);
printf("cnn2 state: %s\n",
(LPCTSTR)GetState(pConnection2->State)); // Open a connection using a DSN and OLE DB tags.
TESTHR(pConnection3.CreateInstance(__uuidof(Connection)));
pConnection3->ConnectionString = "Data Source=Pubs;";
pConnection3->Open("","","",adConnectUnspecified);
printf("cnn3 state: %s\n",
(LPCTSTR)GetState(pConnection3->State)); // Open a connection using a DSN and individual
// arguments instead of a connection string.
// It is assumed that you have create DSN 'Pubs' with a user name as
// 'MyUserId' and password as 'MyPassword'.
TESTHR(pConnection4.CreateInstance(__uuidof(Connection)));
pConnection4->Open("Pubs","MyUserId","MyPassword",adConnectUnspecified);
printf("cnn4 state: %s\n",
(LPCTSTR)GetState(pConnection4->State));
}
catch(_com_error &e)
{
// Notify user of any errors.
// Pass a connection pointer accessed from the Connection.
PrintProviderError(pConnection1);
if(pConnection2)
PrintProviderError(pConnection2);
if(pConnection3)
PrintProviderError(pConnection3);
if(pConnection4)
PrintProviderError(pConnection4);
PrintComError(e);
} //Cleanup objects before exit.
if (pConnection1)
if (pConnection1->State == adStateOpen)
pConnection1->Close();
if (pConnection2)
if (pConnection2->State == adStateOpen)
pConnection2->Close();
if (pConnection3)
if (pConnection3->State == adStateOpen)
pConnection3->Close();
if (pConnection4)
if (pConnection4->State == adStateOpen)
pConnection4->Close();
} ///////////////////////////////////////////////////////////
// //
// GetState Function //
// //
/////////////////////////////////////////////////////////// _bstr_t GetState(int intState)
{
_bstr_t strState;
switch(intState)
{
case adStateClosed:
strState = "adStateClosed";
break;
case adStateOpen:
strState = "adStateOpen";
break;
default:
;
}
return strState;
} ///////////////////////////////////////////////////////////
// //
// PrintProviderError Function //
// //
/////////////////////////////////////////////////////////// void PrintProviderError(_ConnectionPtr pConnection)
{
// Print Provider Errors from Connection object.
// pErr is a record object in the Connection's Error collection.
ErrorPtr pErr = NULL; if( (pConnection->Errors->Count) > 0)
{
long nCount = pConnection->Errors->Count; // Collection ranges from 0 to nCount -1.
for(long i = 0; i < nCount; i++)
{
pErr = pConnection->Errors->GetItem(i);
printf("Error number: %x\t%s\n", pErr->Number,
(LPCSTR)pErr->Description);
}
}
} ///////////////////////////////////////////////////////////
// //
// PrintComError Function //
// //
/////////////////////////////////////////////////////////// void PrintComError(_com_error &e)
{
_bstr_t bstrSource(e.Source());
_bstr_t bstrDescription(e.Description()); // Print Com errors.
printf("Error\n");
printf("\tCode = %08lx\n", e.Error());
printf("\tCode meaning = %s\n", e.ErrorMessage());
printf("\tSource = %s\n", (LPCSTR) bstrSource);
printf("\tDescription = %s\n", (LPCSTR) bstrDescription);
}
// EndConnectionStringCpp