Microsoft Knowledge Base Email Alertz

(259492) - To retrieve the value of a newly inserted Identity field, set the Open rowset DBPROP_SERVERDATAONINSERT property to True.

Search KbAlertz

Advanced Search

Receive Microsoft Knowledge Base articles by E-Mail?

Every night we scan the Microsoft Knowledge Base. If technologies you're interested in are updated, we'll send you an e-mail. You only get one e-mail a day, and only when new articles are added.

Click here to create a
FREE account
Already have an account?
[Click here to Login]











Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
©2005-©2007 Microsoft Corporation. All rights reserved. Terms of Use | Trademarks

Article ID: 259492 - Last Review: July 13, 2004 - Revision: 3.2

How To Use DBPROP_SERVERDATAONINSERT to Retrieve the Identity Value of a New Row

This article was previously published under Q259492

SUMMARY

To retrieve the value of a newly inserted Identity field, set the Open rowset DBPROP_SERVERDATAONINSERT property to True.

MORE INFORMATION

The DBPROP_SERVERDATAONINSERT property allows the provider to update the local row cache as soon as the server commits the insert of the Identity field.

NOTE: The Microsoft OLE DB Programmer's Reference states that setting DBPROP_SERVERDATAONINSERT is potentially expensive and may not be supported for certain types of rowsets. You must have a Primary Key selected for the table before using the DBPROP_SERVERDATAONINSERT property.

The following code demonstrates how to retrieve the value after you insert the new row:
#include "atldbcli.h"
class CdboIdentAccessor
{
public:
	LONG m_myident;
        DBSTATUS m_identstatus;
	TCHAR m_name[11];
        DBSTATUS m_namestatus;

BEGIN_COLUMN_MAP(CdboIdentAccessor)
	COLUMN_ENTRY_STATUS(1, m_myident,m_identstatus)
	COLUMN_ENTRY_STATUS(2, m_name,m_namestatus)
END_COLUMN_MAP()

DEFINE_COMMAND(CdboIdentAccessor, _T(" \ 
	SELECT \ 
		myident, \ 
		name  \ 
		FROM dbo.Ident"))
	
	void ClearRecord()
	{
		memset(this, 0, sizeof(*this));
	}
};

class CdboIdent : public CCommand<CAccessor<CdboIdentAccessor> >
{
public:
	HRESULT Open()
	{
		HRESULT		hr;

		hr = OpenDataSource();
		if (FAILED(hr))
			return hr;

		return OpenRowset();
	}
	HRESULT OpenDataSource()
	{
	HRESULT		hr;
	  CDataSource db;
	  CDBPropSet	dbinit(DBPROPSET_DBINIT);

	  dbinit.AddProperty(DBPROP_AUTH_USERID, OLESTR("sa"));
	  dbinit.AddProperty(DBPROP_INIT_CATALOG, OLESTR("test"));
           dbinit.AddProperty(DBPROP_INIT_DATASOURCE,
 OLESTR("SERVER"));
	  dbinit.AddProperty(DBPROP_INIT_LCID, (long)1033);
	  dbinit.AddProperty(DBPROP_INIT_PROMPT, (short)4);
	  hr = db.Open(_T("SQLOLEDB.1"), &dbinit);
	  /hr = db.OpenWithServiceComponents(_T("SQLOLEDB.1"),
 &dbinit);
	  if (FAILED(hr))
	  return hr;

          return m_session.Open(db);
	}
	HRESULT OpenRowset()
	{
	  // Set properties for open
           // Notice the DBPROP_SERVERDATAONINSERT set to true
	     CDBPropSet propset(DBPROPSET_ROWSET);
	     propset.AddProperty(DBPROP_SERVERCURSOR, true );
	     propset.AddProperty(DBPROP_SERVERDATAONINSERT, true );
	     propset.AddProperty(DBPROP_IRowsetChange, true);
	     propset.AddProperty(DBPROP_UPDATABILITY, 
              DBPROPVAL_UP_CHANGE | DBPROPVAL_UP_INSERT 
|             DBPROPVAL_UP_DELETE );

          return CCommand<CAccessor<CdboIdentAccessor> 
>::Open(m_session, NULL, &propset);
	}
	CSession	m_session;
};

int main(void)
{
	HRESULT hr;
	CdboIdent test;

	// Connect the database, session, and accessors
	CoInitialize(NULL);
	hr = test.Open();

	if (FAILED(hr))
	{
		IErrorInfo* pErrInfo;
		BSTR bstrDesc = NULL;
		GetErrorInfo(0,&pErrInfo);
		pErrInfo->GetDescription(&bstrDesc);
		SysFreeString(bstrDesc);
	}

	test.ClearRecord();
   	strcpy ( test.m_name, "New");
   	test.m_identstatus = DBSTATUS_S_IGNORE;
   	hr = test.Insert(0,true);   // Insert new Row

	test.GetData();            // Get the inserted row
         cout << test.m_myident << endl;  // Output the 
value for Identity field
	test.Close( );
	return S_OK;
}
				

REFERENCES

For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:
194678  (http://kbalertz.com/Feedback.aspx?kbNumber=194678/EN-US/ ) How To SQL Server Identity, OLE DB Templates and OLE DB for ODBC
219029  (http://kbalertz.com/Feedback.aspx?kbNumber=219029/EN-US/ ) How To Retrieve Calculated Fields from SQL Server 7.0
For more information about the BPROP_SERVERDATAONINSERT property, please refer to the Microsoft OLE DB Programmer's Reference.

APPLIES TO
  • Microsoft ActiveX Template Library 2.0, when used with:
    • Microsoft Visual C++ 6.0 Enterprise Edition
    • Microsoft Visual C++ 6.0 Professional Edition
    • Microsoft Visual C++, 32-bit Learning Edition 6.0
  • Microsoft ActiveX Template Library 2.1, when used with:
    • Microsoft Visual C++ 6.0 Enterprise Edition
    • Microsoft Visual C++ 6.0 Professional Edition
    • Microsoft Visual C++, 32-bit Learning Edition 6.0
  • Microsoft ActiveX Template Library 3.0, when used with:
    • Microsoft Visual C++ 6.0 Enterprise Edition
    • Microsoft Visual C++ 6.0 Professional Edition
    • Microsoft Visual C++, 32-bit Learning Edition 6.0
  • Microsoft OLE DB Provider for SQL Server 7.0
  • Microsoft OLE DB Provider for SQL Server 7.01
  • Microsoft Data Access Components 2.1
  • Microsoft Data Access Components 2.5
  • Microsoft Data Access Components 2.6
Keywords: 
kbconsumer kbdtl kbhowto KB259492
       

Community Feedback System

Very often, it takes hours to solve a problem. Very often, you've looked high and low, and have tried a lot of solutions. When you finally found it, chances are, it was because someone else helped you. Here's your chance to give back. Use our community feedback tool to let others know what worked for you and what didn't.

Please also understand that the community feedback system is not warranted to be correct, it's simply a system that we've built to let people try and help each other. If something in a feedback response doesn't make sense to you, or you're not comfortable making changes that the feedback talks about (like registry edits), please consult a professional.

Thank you for using kbAlertz.com Feedback System.

-- Scott Cate