There is alot of magic going on behind the scenes (which I will blog about in a separate post), but you do not need to know how it works to use it, e.g expression then the value of the Text property is pushed into a dictionary which the data control can retrieve later.
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Right now you must be asking yourself how can you get those dictionaries filled out just as if you were bound to a Datasource control?
The good news is you CAN do it(this is what this blog post is all about right? This is probably one of the worst things you can do.
Unfortunately these dictionaries are only filled out if you are bound to a datasource control :(.
So that means when you bind to some raw collection and hook up to the Data Source property then call databind, if you try to handle the delete or update events these dictionaries are going to be empty.
If you can, use 2 way databinding, if your control doesn't have a useful property to bind against and you need to do some more logic to get the right value then use Find Control.
Edit: I've updated the code to loop over the Cells collection instead of the Controls collection (which is alot cleaner).
So I decided to instead put the code in an assembly and make available for download here.
the good old problem of getting the data from the row that is being currently edited within a Grid View. Accessing the "Controls": This method gets you access to the control in the Grid View, which might be useful based on what you are doing.
A Grid View Update Event Args object is passed to the event-handling method, which enables you to determine the index of the current row and to indicate that the update operation should be canceled.
To cancel the update operation, set the collections, if necessary, before the values are passed to the data source.
Uses Most data controls support writing custom commands and handling some Command event(Row Command for Grid View).