How To Compact Microsoft Access Database Through ADO. Although ADO specification does not provide objects to compact Microsoft Access databases, this capability can be achieved by using the ADO extension: Microsoft Jet OLE DB Provider and Replication Objects (JRO). This capability was implemented for the first time in the JET OLE DB Provider version 4.0 (Msjetoledb40.dll) and JRO version 2.1 (Msjro.dll). These DLL files are available after the install of MDAC 2.1. Create In-Memory ADO Recordsets.
Creating in-memory ADO recordsets may be a solution in search of a problem, but I find the process fascinating and there's been at least one occasion where it was just the right thing for my application.
Maybe it's just what you need too. The download has everything you'll need to check it out. Store ADO Recordset Data Without a Database. April 2000 by Jason A.
Fisher Nowadays it seems like almost every program you write needs to be a database application of some kind. ACC: Using Microsoft Access as an Automation Server. This article discusses the following topics: Creating a Reference to Microsoft AccessUsing GetObject() and CreateObject() FunctionsUnderstanding the UserControl and Visible PropertiesViewing an Instance of Microsoft AccessClosing an Instance of Microsoft AccessBypassing Startup Settings When Opening a DatabaseCalling Microsoft Access FunctionsCalling Custom ProceduresUsing a Run-Time ApplicationUsing a Secured WorkgroupExamples: Previewing or Printing a Report Calling a Report Wizard to Create a New Report Creating a Reference to Microsoft Access Automation enables you to control or manipulate Microsoft Access objects from other applications using Visual Basic code.
To make this possible, information about Microsoft Access objects is stored in a type library called Msaccess.tlb. If you want optimal performance for your OLE Automation code, you can create a reference to the Microsoft Access type library. To create a reference: Access: Data Type Mismatch using boolean function in query criteria. How to compact a Microsoft Access database by using Visual Basic .NET. Neither ActiveX Data Objects (ADO) nor ADO .NET provide the means to compact or repair Microsoft Access databases. However, you can accomplish this task by using the Microsoft Jet OLE DB Provider and Replication Objects (JRO) that was introduced with Microsoft Data Access Components (MDAC) version 2.1. ADO .NET allows the use of COM-based object libraries through the Interop layer. Compact access 2007 database.
Code Snippet Public Function CompactDb(ByVal sDB As String) As Long Try Dim sLocalFile As String = System.AppDomain.CurrentDomain.BaseDirectory().ToString & ParsePath(sDB, vbNormal, False) Dim sLocalOutFile As String = System.AppDomain.CurrentDomain.BaseDirectory().ToString & "NAMEHERE_Compacted.accdb" RaiseEvent CopyStart("Backing Up " & sDB) Application.DoEvents() CopyFileEx(sDB, Replace(sDB, "accdb", "bak"), cpr, 0, 0, 0) RaiseEvent CopyEnd("Backup Successful") RaiseEvent CopyStart("Copying " & sDB & " to " & sLocalFile) CopyFileEx(sDB, sLocalFile, cpr, 0, 0, 0) RaiseEvent CopyEnd("Copy Successful")
Compact and Repair Access Database using C# and late binding. Introduction This code compacts and repairs an MS Access database from a C# .NET application, no matter if it's a simple ".mdb", or a ".mdw"-secured workgroup-shared DB. It performs exactly the same operation as "Tools - Database Utils - Compact and Repair Database... " menu item in the MS Access application. The code uses "late binding" (creating COM-objects in memory at runtime), and that's why you don't need any annoying interop COM references in your project. You don't even need MS Office installed.
Just make sure you have a Jet Engine (Jet is included in MDAC package, which comes with any Windows installation starting from NT 4). Background Don't you hate COM-library references in .NET-projects? Using the code Just call a method CompactAccessDB. Parameters: connectionString - connection string to your database. mdwfilename - is a full name (path+name) of an MDB-file you want to compact and repair. When you call this method, make sure that there's no open connections to your database. Microsoft Jet Database Engine. From Wikipedia, the free encyclopedia Jet is the database engine behind Microsoft's Access. JET stands for Joint Engine Technology, sometimes being referred to as Microsoft JET Engine or simply Jet. Microsoft Access and Visual Basic use or have used Jet as their underlying database engine. It has since been superseded, however, first by Microsoft Desktop Engine (MSDE), then later by SQL Server 2005 Express Edition and most recently by SQL Server 2005 Compact Edition.
Jet is now part of Microsoft Windows and is no longer a component of Microsoft Data Access Components (MDAC). Over the years, Jet has become almost synonymous with Microsoft Access, to the extent where many people incorrectly refer to a Jet database as an "Access database". Architecture Locking There were two mechanisms that Microsoft used for locking: pessimistic locking, and optimistic locking. Transaction processing. 80004005, Microsoft OLE DB Provider for ODBC Driver Error 80004005, Microsoft Jet Database Engine Error 80004005, Error 80004005, Provider Error 80004005. How To Automate Microsoft Access From Visual Basic .NET. This article provides step-by-step samples that show you how to automate Microsoft Access from Visual Basic .NET.
The topics and the sample code show you how to do the following: Open a database in AccessPrint or preview an Access reportShow and edit an Access formAvoid dialog boxes when you open a password-protected database or when user-level security is turned onAutomate the Access Runtime Automation vs. ADO.NET A developer can work with a Microsoft Access database from Visual Basic .NET using two separate technologies: Automation and Microsoft ActiveX Data Objects (ADO.NET).
References that you may have to set when you work with databases in Access 2003. How to compact a Microsoft Access database by using Visual Basic .NET. Access Object Model Reference. Vb6 - Calling a Stored Procedure in Access 2007 from VB 6.0. HOW TO: Create a Parameterized Jet Stored Procedure using DDL in Access 2000. This article shows you how to create a stored procedure in the Visual Basic Environment and, if needed, how to add a parameter to the existing stored procedure.
NOTE: Native stored procedures are new in Microsoft Access 2000. You cannot create and run stored procedures through the user interface. You must use the Visual Basic Environment with ActiveX Data Objects (ADO) or the Database Definition Language (DDL). Creating a Stored Procedure The following steps show you how to create a stored procedure with a parameter and how to run it in the Visual Basic Environment: In the sample database Northwind.mdb, create a new module called TestStoredProc. Lesson 21: The Microsoft Access Object Library. The Microsoft Access Object Library relies on classes to do anything.
The most fundamental class in this library is called Object (remember that Microsoft Access is not case-sensitive). Therefore, when using variables that would use this library, you can declare a variable of this class and then initialize it. One of the most fundamental objects in the Microsoft Access Object Library is named DBEngine. Everything that exists in your database comes directly or indirectly from this object.
Because this object is static (it does not change) and is automatically available when you start a new database (it is one of the default objects of the application), you do not need to declare a variable for it. When you start a database in Microsoft Access, you are said to have started a session. In Microsoft Access, a session is programmatically considered, or called, a workspace and it is represented by the Workspace object. The first argument can be the name of the database you want to create. 80004005, Microsoft OLE DB Provider for ODBC Driver Error 80004005, Microsoft Jet Database Engine Error 80004005, Error 80004005, Provider Error 80004005.
ODBC Drivers, Servers and Vendors. CompactDatabase Method [Access 2007 Developer Reference] Copies and compacts a closed database, and gives you the option of changing its version, collating order, and encryption. (Microsoft Access workspaces only). . Syntax expression.CompactDatabase(SrcName, DstName, DstLocale, Options, password) expression An expression that returns a DBEngine object.
Parameters.