oledb

问题 I'm trying to connect to an Access database file using a System.Data.OleDb.OleDbConnection. I need to connect in readonly mode because another application uses it at the same time. I can connect to the database in read/write no problem but can't seem to find anywhere the correct string for readonly. I've tried: Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Mode=Read Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Extended

问题 I'm trying to connect to an Access database file using a System.Data.OleDb.OleDbConnection. I need to connect in readonly mode because another application uses it at the same time. I can connect to the database in read/write no problem but can't seem to find anywhere the correct string for readonly. I've tried: Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Mode=Read Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Extended

问题 I wrote a windows service using VB that read some legacy data from Visual Foxpro Databases to be inserted in SQL 2005. The problem is this use to run fine in Windows server 2003 32-Bits, but the client recently moved to Windows 2003 64-Bits and now the service won't work. I'm getting a message the the VFP .NET OLEdb provider is not found. I researched and everything seems to point out that there is no solution. Any Help, please... 回答1: Have you tried changing the target CPU to x86 instead of

问题 No error message available, result code: E_UNEXPECTED(0x8000FFFF). I couldn't find any solutions through google. Encountered this while parsing an excel file. Does anyone know why this even occurs? It would be fine and all if it allowed me to recover from the error, but it even goes through the try catch and finally clause and renders my program useless! Here's a more detailed question I asked yesterday that's related: OleDb Object Invalid or No Longer Set 回答1: E_UNEXPECTED is usually

问题 My current project is to take information from an OleDbDatabase and .CSV files and place it all into a larger OleDbDatabase . I have currently read in all the information I need from both .CSV files, and the OleDbDatabase into DataTables .... Where it is getting hairy is writing all of the information back to another OleDbDatabase. Right now my current method is to do something like this: OleDbTransaction myTransaction = null; try { OleDbConnection conn = new OleDbConnection("PROVIDER

问题 Consider this query that uses SELECT * and 'appends' a calculated column: SELECT *, IIF(TRUE, 1, 0) AS calculated_col FROM Orders; I would expect calculated_col to be the rightmost column in the resultset. However, it is in fact the leftmost column. It is the rightmost when executing the equivalent query in SQL Server, for example. Now, because this is Access (ACE, Jet, whatever), the SQL Standards don't apply and the Access Help will not specify the expected result because it is not detailed

问题 In the end I want to grab a OLE type image from an Access Database and put it into a picture box. Working with Visual Studio 2012 in C# and MS Access 2010. My solution is an app non-web related. So this is the query code. I'm constructing an object ( Equipamento ) with among others an System.Drawing.Image attribute that is the focus of the issue. OleDbConnection l = OleDbConnectionDAO.createConnection(); Equipamento eq = new Equipamento(); try { OleDbDataAdapter adapter = new OleDbDataAdapter

问题 We have Novell server and there Advantage Database Server 9.1 is installed and all other Xbase++ programs access DBF files from that location. I want to access DBF files from C# asmx webservice. Problem is if I use Visual FoxPro VFP OLEDB then it only works while running asmx webservice in Visual studio's Debug mode but when I publish it to IIS, it gives this error: System.Data.OleDb.OleDbException: Invalid path or file name First Attempt (with ADS OLEDB): It works ONLY when DBF files are not

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I'm confused. I'm trying to add a single record into an Access 2000 database using ASP.Net. However, when I try to add new record, I get the following error: Exception Details: System.Data.OleDb.OleDbException: Operation must use an updateable query. 回答1: Admittedly, the error message is misleading. The reason

问题 I have an application that uses Microsoft ACE OLEDB 12.0 driver and hence I have installed 2007 Office System Driver: Data Connectivity Components in my system. I also have created SSIS packages to pull data from the excel and csv files which get's inserted into the SQL tables using the Microsoft ACE OLEDB 12.0. Below is my connection string Provider=Microsoft.ACE.OLEDB.12.0;Data Source=c:\myFolder\myOldExcelFile.xls; Extended Properties="Excel 8.0;HDR=YES"; I wanted to move these