ado

问题 I have a "Remote Control" webpage that lets me "manage" key stats for a website e.g there is a page that shows the stats, no of records, dates, times things happened, whether they have happened or not and so on. Then I have "a remote control" page which lets me fire off certain tasks such as "run job A" "set value of X to C" "delete records in table B" and so on. This is just a list of links that then runs an SQL ADO Command with an ADO Connection string. At the moment the page waits for the

问题 I have a multi-user Access database which is compacted daily using a powershell script. This script can't compact the database if there are still users logged in. If there is a user logged in, I would like be able to idenify the user(s) who forgot to logout of the database and remind them to log out at the end of the day. If I were to write this in VB it would work like this: Dim cn as ADODB.Connection Dim rs as ADODB.Recordset cn.open("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=...mdb")

问题 all is in the title :-) Some explanation : In order to use a vb6 with C# (COM / Interop) I have a performance issue with Data Access. I don't know why but the code is four times slower in C# via Interop. I'm trying to find a workaround and I would to replace the rdo by ADO to gain performance. old code (with rdo) : strSelect = _ QUERY1 & ";" & _ QUERY2 & ";" & _ QUERY3 & ";" & _ QUERY4 & ";" & _ QUERY5 & ";" & _ QUERY6 'Fp.Cn is a rdoConnection Set Fp.rs = Fp.Cn.OpenResultset(strSelect)

问题 I need to compute a list of table names in a given database (MDB format), which have certain format (for example which contains DateTime field "Date Applied"). How can I do it? Note: I am using Delphi 7, ADO components, Microsoft JET 4.0 to connect to MDB type Database. 回答1: A schema may suit: Set rs = cn.OpenSchema(adSchemaColumns, _ Array(Empty, Empty, Empty, SelectFieldName)) Where adSchemaColumns = 4 rs is a recordset object cn a connection object SelectFieldName is the column name, "Date

问题 I am getting an error message while trying to update one excel table from another excel table in a different (and closed) workbook. The error only appear when the source workbook is not in a .xls format . You cannot edit this field because it resides in a linked Excel spreadsheet. The ability to edit data in a linked Excel spreadsheet has been disabled in this Access Release. This is supposed to be an expected behavior when using Access. Why am I seeing this error as I'm not working with

问题 i've used the parameter method but now i have a problem. i want to insert all my data inside the table. i need to insert 2 table at once. so heres my full coding. need help. why it says like that? ADOQuery1.Close(); ADOQuery1.SQL.Clear; ADOQuery1.SQL.Add('INSERT INTO STUDENT (CARD_ID,NAMA,MATRIC_ID,SUBJEK,KURSUS,FAKULTI,Seksyen,TAHUN) VALUES '); ADOQuery1.SQL.Add('(card,nama,matric,subjek,kursus,fakulti,seksyen,tahun)'); ADOQuery1.SQL.Add('INSERT INTO subjek2 (CARD_ID, MATRIC_ID,NAMA,SUBJEK)

问题 I am using SQLServer EXPRESS on a local PC to house the database and connecting with an ADO recordset from Excel/VBA. What are the implications of using adUseClient vs adUseServer for the recordset.CursorLocation property? The documentation I have found primarily deals with the pros and cons of resource availability on the server vs client BUT this is not an issue here as the server & client are the same device. 回答1: That is a bit incomplete - it's not just about the location but also the

问题 I have an Oracle 10g database with a field defined as NUMBER. I am converting a classic ASP (vbscript) from inline sql to parameterized. I cannot get the ADO.PARAMETER to map to a NUMBER. All I get is "Parameter object is improperly defined. Inconsistent or incomplete information was provided." I've tried decimal, numeric, with precision and scale, int, bigint, varchar, sizes and everything combination I can think of. Dim param Set param = Server.CreateObject("ADODB.Parameter") param.Type = ?

问题 I'm having trouble getting a field of LONG out of the database and into my Excel (VBA + ADO) application. I wonder if anyone could help? Doing this has no effect at all (casting to a string, or not): myString = dataset!long_field I tried the GetChunk method, which is supposed to do what I'm hoping: myString = CStr(dataset!long_field.GetChunk(1000)) This does get something, but it's not the data I'm expecting (it's usually some garbled mess). What's weird is that, if I try running this in the

问题 I just switched from using the BDE to ADO by replacing the Tables and Queries to its equivalent in ADO components. I'm always execute the query inside try...catch like this: //Fdm is Data Module //TEndOfDay is TTable //QEndOfDay is TQuery Screen->Cursor = crSQLWait; Fdm->QEndOfDay->SQL->Add("SELECT * FROM TEndOfDay"); try{ Fdm->QEndOfDay->ExecSQL(); Fdm->QEndOfDay->Open(); Screen->Cursor = crDefault; } catch (EDBEngineError &DBEngineError){ strError = DBEngineError.Message; Screen->Cursor =