Formview fired event itemupdating which wasn t handled

Once we have a reference to the Text Box, we set the new first name.For the Template Field, we do know the ID of the control since we specified it in the markup, so we obtain a reference to it by calling Find Control on the appropriate row of the Grid View.In this example, we’ll go through a fully featured Grid View with editing, deleting, selecting, sorting, and paging functionality that is manually bound and identify the limitations and some of the workarounds. Sql Data Source, Object Data Source, Linq Data Source, etc) specified in a Data Source ID, the Grid View can automate many functions because, through the data source control, the Grid View on its own can perform the following operations: When you manually bind data to a Grid View, the Grid View itself cannot perform these operations, so they must be implemented in your code.The Grid View does know the events that should be used to implement them, so the exceptions shown above are thrown when you try to perform one of these operations, but you have implemented the appropriate event handler.In that case a Text Box is created and added to the Controls collection for the appropriate cell (and it’s the only item added to the Controls collection, so it’s Controls[0]).

In addition to that, we’re resetting the Edit Index and Selected Index when the page is changed to avoid cases, for example, where you change pages and are suddenly editing a different item.

We’ll revisit this method when we implement the sorting functionality.

We also need force databinding to occur when then page is loaded, which we’ll handle in Page_Load.

The way we’ll accomplish this is to create two properties that store those values in View State.

We’ll get to how these properties are populated shortly, but first we need to go back to the Bind Data method.

When you manually bind the Grid View, this tracking does not occur, so we must implement some mechanism for tracking those values.

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