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Annoying cursoradapter
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From
25/10/2004 11:53:47
 
 
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General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Title:
Annoying cursoradapter
Environment versions
Database:
Visual FoxPro
Miscellaneous
Thread ID:
00954292
Message ID:
00954292
Views:
61
Hello,

At the end of this message is the code from my first try of an updatable CursorAdapter using an OLEDB connection, that I tried to adapt from examples found on the web. That it didn't work wasn't a big surprise for me, but it didn't work in a very annoying way :

The first run goes all the way until it fails with the error "OLE object is invalid or corrupted" on the final USE ; it also doesn't update the table. After this run, the cursoradapter is still shown in my current data session and cannot be closed anymore ; any subsequent run using a cursoradapter fails, and even shutting down VFP fails. The error is always the same : "Cannot update ADODB.Recordset while cursor, created by CursorAdapter.CursorFill method, is not attached to a CursorAdapter object." All I am left with is killing VFP.

No error occurs if I remove the line setting the UpdateCmd property of the CursorAdapter.

So two things could help me a lot : telling me what's wrong in the code below, or telling me how to avoid VFP getting stuck in this situation, so that I could try to debug it by myself without losing one minute at each try.
	* loConn is a valid, open ADODB.Connection object
	loCursorAdapter=CREATEOBJECT("CursorAdapter")
	lcSql="SELECT * FROM test ORDER BY testid"
	lcSqlUpdate="UPDATE test SET teststring='test5' WHERE testid=4"
	WITH loCursorAdapter
		.Alias="MyAdapter"
		.DataSourceType="ADO"
		.DataSource=CREATEOBJECT("ADODB.RecordSet")
		.InsertCmdDataSourceType="ADO"
		.UpdateCmdDataSourceType="ADO"
		.DeleteCmdDataSourceType="ADO"
		.UpdateCmd=lcSqlUpdate
		.DataSource.ActiveConnection=loConn
	ENDWITH
	SET MULTILOCKS ON
	loCommand=CREATEOBJECT("ADODB.Command")
	WITH loCommand
		.CommandText=lcSql
		.CommandType=1
		.ActiveConnection=loConn
	ENDWITH
	loRecordSet=CREATEOBJECT("ADODB.RecordSet")
	WITH loRecordSet
		.CursorLocation=3
		.CursorType=3
		.LockType=3
		.Source=loCommand
		.Open()
	ENDWITH
	THIS.oCursorAdapter.DataSource.ActiveConnection=THIS.oConnection
	loCursorAdapter.CursorFill(.F.,.F.,0,loRecordSet)
	LOCATE FOR testid=4
	REPLACE teststring WITH "test5"
	IF TABLEUPDATE()
		? "TABLEUPDATE"
	ENDIF
	loRecordSet.Close()
	loConn.Close()
	USE
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