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Because we already added a control to the page earlier that references our Categories within our LINQ to SQL data model, all I need to-do to create a drop-downlist control at the top of the page that binds against this.
For example: When I run the page I'll now get a filter dropdownlist of all categories at the top of the page: My last step is to configure the Grid View to only show those Products in the category the end-user selects from the dropdownlist.
I can change the Grid View to display the Supplier Name and Category Name instead of the ID's by replacing the default .
Within this Template Field I can add any content I want to customize the look of the column.
For example, we could remove the "Quantity Per Unit" column below and re-run our application to get this slightly cleaner UI: If you have used the control before and explicitly passed update parameters to update methods (the default when using Data Set based Table Adapters) one of the things you know can be painful is that you have to change the method signatures of your Table Adapter's update methods when the parameters based by your UI are modified.
What this means is that I can easily databind their Supplier. Category Name sub-properties within our Grid: And now when I run the application I get the human readable Category and Supplier name values instead: To get drop-down list UI for the Supplier and Category columns while in Edit-Mode in the Grid, I will first add two additional columns we added to our Grid View earlier and customize their edit appearance (by specifying an Edit Item Template).
The control (via its Data Source ID) and indicates which columns should be included in the grid, what their header text should be, as well as what sort expression to use when the column header is selected.
Now that we have the basics of our web UI working against our LINQ to SQL data-model, we can go ahead and further customize the UI and behavior.
NET control that implements the Data Source Control pattern introduced with ASP. It is similar to the Object Data Source and Sql Data Source controls in that it can be used to declaratively bind other ASP. Where it differs is that instead of binding directly to a database (like the Sql Data Source) or to a generic class (like the Object Data Source), the on my page that points to my LINQ to SQL datacontext class, and identify the entities (for example: Products) in the LINQ to SQL data model I want to bind against.
I could then point a Grid View at it (by settings its Data Source ID property) to get a grid-like view of the Product content: Without having to-do anything else, I can run the page and have a listing of my Product data with built-in support for paging and sorting over the data.