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ADO : AddNew Method Example

기타 언어/C# & MFC
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This example uses the AddNew method to create a new record with the specified name.

// BeginAddNewCpp
#import "C:\Program Files\Common Files\System\ADO\msado15.dll" \
    no_namespace rename("EOF", "EndOfFile")


#include <ole2.h>
#include <stdio.h>
#include "conio.h"
#include "AddNewX.h"

//Function declaration
inline void TESTHR(HRESULT x) {if FAILED(x) _com_issue_error(x);};
void AddNewX(VOID);
void PrintProviderError(_ConnectionPtr pConnection);

///////////////////////////////////////////////////////////
//                                                       //
//      Main Function                                    //
//                                                       //
///////////////////////////////////////////////////////////
void main()
{
   HRESULT  hr = S_OK;

   if(FAILED(::CoInitialize(NULL))) 
      return; 

   if (SUCCEEDED(hr))
   {
       AddNewX();

      //Wait here for the user to see the output
      printf("Press any key to continue...");
      getch();

       ::CoUninitialize();
   }
}


///////////////////////////////////////////////////////////
//                                                       //
//      AddNewX Function                                 //
//                                                       //
///////////////////////////////////////////////////////////
VOID  AddNewX(VOID)
{

   // Define ADO object pointers.
    // Initialize pointers on define.
   _RecordsetPtr pRstEmployees = NULL;
   _ConnectionPtr pConnection  = NULL;

   //Define Other variables
   IADORecordBinding   *picRs = NULL;  //Interface Pointer declared.(VC++ Extensions)   
   CEmployeeRs emprs;    //C++ class object   

   HRESULT hr = S_OK;

                           //Replace Data Source value with your server name.
   _bstr_t strCnn("Provider=sqloledb;Data Source=MyServer;Initial Catalog=pubs;User Id=sa;Password=;");
   _bstr_t strId;
    _bstr_t strMessage;
   
   try
   {
      //Open a connection
      TESTHR(pConnection.CreateInstance(__uuidof(Connection)));
      pConnection->Open(strCnn,"","",adConnectUnspecified);
      

      //Open employee table 
      TESTHR(pRstEmployees.CreateInstance(__uuidof(Recordset)));

      //You have to explicitly pass the Cursor type and LockType to the Recordset here
      pRstEmployees->Open("employee",_variant_t((IDispatch *) pConnection, true),
adOpenKeyset,adLockOptimistic,adCmdTable); //Open an IADORecordBinding interface pointer which
// we'll use for Binding Recordset to a class TESTHR(pRstEmployees->QueryInterface(__uuidof(IADORecordBinding),(LPVOID*)&picRs)); //Bind the Recordset to a C++ Class here TESTHR(picRs->BindToRecordset(&emprs)); // Get data from the user.The employee id must be formatted as // first,middle and last initial,five numbers,then M or F to // signify the gender.For example,the employee id for // Bill A. Sorensen would be "BAS55555M". printf("Enter Employee Id: ");scanf("%s",emprs.m_sz_empid); strId = emprs.m_sz_empid; printf("Enter First Name: ");scanf("%s",emprs.m_sz_fname); printf("Enter Last Name:");scanf("%s",emprs.m_sz_lname); //Proceed if the user actually entered some thing //for the id, the first and the last name. if(strcmp(emprs.m_sz_empid,"") && strcmp(emprs.m_sz_fname,"") && strcmp(emprs.m_sz_lname,"")) { //This adds a new record to the table //if (FAILED(hr = picRs->AddNew(&emprs))) //_com_issue_error(hr); TESTHR(picRs->AddNew(&emprs)); //Show the newly added data printf("New Record: %s %s %s \n",\ emprs.lemp_empidStatus == adFldOK ? emprs.m_sz_empid : "<NULL>",\ emprs.lemp_fnameStatus == adFldOK ? emprs.m_sz_fname : "<NULL>",\ emprs.lemp_lnameStatus == adFldOK ? emprs.m_sz_lname : "<NULL>"); } else printf("Please enter an employee id, first name and last name.\n"); //Delete the new record because this is a demonstration. pConnection->Execute("DELETE FROM EMPLOYEE WHERE emp_id = '"+strId+"'",NULL,adCmdText); //Release the IADORecordset Interface here if (picRs) picRs->Release(); // Clean up objects before exit. pRstEmployees->Close(); pConnection->Close(); } catch(_com_error &e) { // Notify the user of errors if any. _variant_t vtConnect = pRstEmployees->GetActiveConnection(); // GetActiveConnection returns connect string if connection // is not open, else returns Connection object. switch(vtConnect.vt) { case VT_BSTR: printf("Error:\n"); printf("Code = %08lx\n", e.Error()); printf("Message = %s\n", e.ErrorMessage()); printf("Source = %s\n", (LPCSTR) e.Source()); printf("Description = %s\n", (LPCSTR) e.Description()); break; case VT_DISPATCH: PrintProviderError(vtConnect); break; default: printf("Errors occured."); break; } } } /////////////////////////////////////////////////////////// // // // 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; 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); } } } // EndAddNewCpp

AddNewX.h:

// BeginAddNewH
#include "icrsint.h"


//This Class extracts empid, fname and lastname  

class CEmployeeRs : public CADORecordBinding
{
BEGIN_ADO_BINDING(CEmployeeRs)
    
   //Column empid is the 1st field in the recordset   

   ADO_VARIABLE_LENGTH_ENTRY2(1, adVarChar, m_sz_empid, 
         sizeof(m_sz_empid), lemp_empidStatus, TRUE)

   ADO_VARIABLE_LENGTH_ENTRY2(2, adVarChar, m_sz_fname, 
         sizeof(m_sz_fname), lemp_fnameStatus, TRUE)

   ADO_VARIABLE_LENGTH_ENTRY2(4, adVarChar, m_sz_lname, 
         sizeof(m_sz_lname), lemp_lnameStatus, TRUE)
   
END_ADO_BINDING()

public:

   CHAR  m_sz_empid[10];
   ULONG lemp_empidStatus;
   CHAR   m_sz_fname[40];
   ULONG  lemp_fnameStatus;
   CHAR   m_sz_lname[41];
   ULONG  lemp_lnameStatus;

};
// EndAddNewH
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Posted by 녹두장군

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