The data is then rebound to the Grid View and the markup is sent back to the client with the Test Category no longer present.
While the delete workflow successfully removed the Test Category record from the File Was Not Deleted from the Web Server s File System One of the downsides of storing binary data external to the database is that extra steps must be taken to clean up these files when the associated database record is deleted.
This wizard starts by asking us how the Table Adapter query should access the database. The next step prompts for the type of query to be generated. Update, false)] public bool Update Category(string category Name, string description, string brochure Path, byte picture, int category ID) [System. As we discussed back in the An Overview of Inserting, Updating, and Deleting Data tutorial, the Grid View provides built-in deleting capabilities and these capabilities can be enabled at the tick of a checkbox if the grid s underlying data source supports deleting.
Since we re creating a query to add a new record to the (Click to view full-size image) In addition to updating the DAL, we need to update the BLL to include methods for updating and deleting a category. Currently the Object Data Source the Grid View is bound to () does not support deleting.
The (Click to view full-size image) This Radio Button List provides the three options for the user.
The idea is that the File Upload control will be displayed only if the last option, Upload new brochure, is selected.
Currently, the Object Data Source is not yet configured to include updating support, so let s add that in.
Click the Configure Data Source link from the Object Data Source s wizard and proceed to the second step.
In this tutorial we see how the Grid View control also makes it possible to edit and delete binary data, whether that binary data is saved in the database or stored in the file system.My test category, shown in Figure 6, includes a test brochure file named and a test picture.Figure 7 shows the Grid View after the test category has been added.element and have added a Details View to allow users to add a new category and upload its brochure and picture data.All that remains to be implemented is the ability to edit and delete existing categories, which we'll accomplish in this tutorial using the Grid View s built-in editing and deleting features. Update, true)] public bool Update Category(string category Name, string description, string brochure Path, int category ID) that listed all categories in a Grid View and provided a Details View to add new categories to the system.