9/15/2023 0 Comments Wpf sqlite tutorial![]() ProductDisplayView is the more complicated view. ![]() The Add button is grayed out because a selection is active. The image above shows a product being deleted. A selection is not permitted when a new product is being Added. A selection is required to Update or Delete a product. The presence or absence of a selection determines what database operations are permitted. A control click may be used to deselect a product. The operator selects a single product by clicking on a model name in ProductSelectionView. In the database, the ModelName of a product is defined to be Unique. ProductSelectionView is a listbox displaying the model names of all products. However, the tile is interesting enough to suggest potential. The reader will have to forgive my artistry. Examine the display to verify the tile is indeed seamless. Also note the use of LightBrushedx.jpg as a repeating background tile for the grid. The Window_Loaded event is just a placeholder, it is not used in the code. Two views are used to keep the code reasonably simple but allow illustration of multiple views interacting with each other in a decoupled fashion. Note the definition of the vw namespace for the views and its use to reference the classes for these views. The rows contain a ProductSelectionView, a GridSplitter, and the ProductDisplayView. The operator is about to delete the third product selected in the blue product selector screen at the top of the display.Īn examination of the Window1.xaml file reveals a simple grid with three rows. A snapshot of the display after adding a few products is shown below. Fill in the product fields and use the Add button to create products in the database. The status field should display OK, indicating the utility was able to access the database. The database connection may be checked by clicking the DB Refresh button. As the database is initially empty, no products will be shown. Run up ProductMvvm.exe to test the connection string. Once a valid connection string is provided, the ProductMvvm utility will run. Only a single line in the config file requires modification. The value shown above specifies my home PC (DOUG-PC) using Windows Integrated Security. Modify the value of the connectionString attribute on line 10 to specify the connection string required to access the xstoredb database you installed. Open, you will see the connection string resides in the following XAML. The connection string is made available to ProductMvvm in the application configuration file. Before you begin, you should have a good idea what the string should look like. Providing a correct connection string can be frustrating. This connection string must be made available to the included ProductMvvm utility for it to successfully connect to xstoredb. However, it provides features seen on the production databases.Īfter installing the xstoredb database, one should know the connection string necessary to connect with it. ![]() The database is a simple one, just two small tables and four Sstored Procedures. This will create an unpopulated database named xstoredb. ![]() Paste the code on the clipboard into the query window and click the Execute button. Run up SQL Server Management Studio and open a new query window. Open this file with an editor and copy the contents to the clipboard. In the top directory is a file named CreateStoreDb.sql. ![]() This includes gel buttons and seamless repeating background tiles. Recognizing that few will be interested in code that requires installing a database, I have tried to make it more appealing by demonstrating some unrelated issues. This article describes the resulting code, what needed to be added, and surprises along the way. Specifically, I wanted the WPF utility to use the MVVM pattern and employ LINQ to SQL to access the database. Over time, I realized the example had to be updated to reflect current coding practices. The example was very standard, straight WPF calling DB procedures via SQLCommands. One of the examples I keep is a tiny database containing a few tables and Stored Procedures, with a corresponding WPF utility to access the database. I like to keep examples of useful code handy as they can be invaluable when beginning a new project. ![]()
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