Master/Detail Filtering with a DropdownList:
Step 1- Displaying Categories in a DropdownList
This step of the VIDEO TUTORIAL will demonstrate on how to add the detail portion of our project. When an end user selects a particular category in the dropdown list, the page will post back and display the corresponding products listed in that category in a GridView below the dropdown list on the same page. In order to accomplish this, a GridView data web control will be added below the dropdown list in the design mode and will be configured to use a ObjectDataSource based on ProductsBLL object. In configuring this ProductsDataSource, the viewer will be introduced on how to pass the selected category from the Dropdown List to the ProductsDataSource for the data display in the GridView with corresponding products. In addition, a demonstration of how to add a new list item to the Dropdown List will also be made.For detailed information and source code for this step, please refer to the original article.