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User Filter Example - Database

Introduction

This project shows an example of using User Filters to provide access to a Microsoft Access MDB database file.

In this example three user filters are created:

• DB_Write - which writes data to a database,
• DB_Read - which allows to retrieve data from a database,
• DB_Query - which performs custom SQL queries to database.

Hints

1. Running this example with x64-bit Studio requires installing Microsoft Access Database Engine 2010 Redistributable x64

   Note If Office 365 is already installed, side-by-side detection will prevent the installation from proceeding. To install the package, perform a quiet installation by running a command such as the following:

   <File location>:\<File name> /quiet
   
   For example: C:\AccessDatabaseEngine.exe /quiet
   

2. To verify which ODCB driver is installed you can use "ODBC Data Sources" (odbcad32.exe) application. Please notice that this application can be executed in 32 and 64 bit mode.

   

3. To build example user filter Microsoft Visual Studio is required.

4. Some problems may occur when Microsoft Access Database Engine 2016 Redistributable is installed. It can be fixed by downgrading in

See Also

• Microsoft ODBC Reference,
• Creating User Filters.

Used Filters

►Click here to show the filters list.

▼Click here to hide the filters list.

Icon	Name	Description
	GetMaximumRegion	Use this filter when you have an array of regions and you want to select one of them that best matches some criterion.
	EnumerateImages	Emulates image acquisition with images stored on disk.
	ExtractBlobs_Intensity	Segments an image into blobs by thresholding using a single value.
	ParseInteger	Returns the integer number represented by a string.
	Exit	If the specified condition is true, exits the macrofilter loop.