![]() There are many flavors of searching for data. ![]() The following project for displaying, adding and save to the file system. The user interface portion is in the project WorkingWithBinaryData (a Windows forms project).Ī closely related topic is interacting with images as shown in In the source code look at the class DataOperations in BackendBlobs class When dealing with larger files to insert into a database it may be prudent to use a BackGroundWorker or asynchronous programming e.g. Method to load data and setup relationships between Customers and Orders table.Īll the same rules and methods apply as when working with strings, dates, numbers and boolean except to work with binary data the following classes are utilized. Using a OleDbDataAdapter data is read into a DataSet for each relationship in this case customers and orders. Rather than go over the connection process, examine the code in MS_AccessConnection In the code samples the connection is done differently in that there is a singleton class to manage connections as some developer prefer this method rather than creatingĪ connection for each method to access data. In the screenshots below, the first example display customers and their orders while the second example uses three ListBox controls to display a clothing product, available colors for the product and what sizes are available for a specific color.Īlthough displaying related data is easy there are other aspects which will go over next that require some knowledge of how to interact with the tables which are stored in a relational DataSet exposed using BindingSource components. Implementing a master/detail form is easy using the interaction between the DataGridView control and the BindingSource component. ![]() Selecting rows in the master table causes the detail table to update One of the most common scenarios for using the DataGridView control is the master/detail form, in which a parent/child relationship between two (or more tables) database tables is displayed. In this part adding and editing data will be covered along with other important topics.c Master-details relations Basics for reading data, removal of data where Part 2 which covers all the basics for designing a database, using base classes for connections with or without a database password, exception handling, CRUD operations, working with transactions and more. Before working with the information in this code sample start with part This code sample/article is a continuation of part 1 where the goal is to provide developers with basic to intermediate to advance methods for working with Microsoft Access databases for desktop solutions utilizing VB.NET programming language with Microsoft
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