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We also need force databinding to occur when then page is loaded, which we’ll handle in Page_Load.
The required actions for paging to work are setting the new page index, setting the Data Source, and calling Data Bind (the last two through the Bind Data method).
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.
The example shown here is for a Grid View, but the same types of event handlers must be implemented in roughly the same way for other data controls including the Form View, Details View, and List View. This is the final Grid View markup, so you can see the event handlers we’re going to implement.
Because we are not using the Grid View’s built-in data model and are binding dynamically, the Grid View will not switch into and out of Edit Mode automatically.
Thus, in order to switch it into Edit Mode, in each of your event handles (Row Editing, Row Updating, and Row Canceling Edit) you must do two things: Protected Sub Grid View1_Row Editing(By Val sender As System.
First, we’ll implement a method to databind the Grid View, which will be called whenever databinding needs to be performed.
We also want it to be something persistent, so that, for example, if you sort, then page, the sort is maintained.
The way we’ll accomplish this is to create two properties that store those values in View State.
The important point is not which of these two events call Bind Data, but one of them must or the Grid View will not be updated. When bound using a Data Source ID, the Grid View internally tracks the current Sort Expression and Sort Direction, and those are available through properties with the same names.
When you manually bind the Grid View, this tracking does not occur, so we must implement some mechanism for tracking those values.Next, we need to define the database connection string.