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Rowupdating old values null

rowupdating old values null-8

edit data binding scenario (you can't use Selected Item. Text is value from a specific column for the same row in a DB table. So, the inner implementation of both properties (Selected Item. Isn't Selected Item (two dots) syntax more complex compared to one-hop-away Selected Value?

rowupdating old values null-5rowupdating old values null-87rowupdating old values null-15

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. Invalid Cast Exception: Unable to cast object of type ' System. Source Error: Line 68: Dim percentage As String = Direct Cast(e. When we edit a row in our Grid View and press the “Update” button, at some time it’s received in the Row Updating method.But as I noted in the comments in that method, some collections that should contain the columns (names, old values and new values) are always empty. And the Row Updated method is never even touched!!! NET Forums that I need to use a Data Source control.If you go with the flow, you probably won't get stuck, but the moment you try to go against the grain you end up with a hand full of thorns.

Most of the data controls have events ending in ing and ed e.g. In most of the event handlers of the ing events it is easy to get the values from the event args.

Forgive me for the variation in my code formatting I'm trying to find the right one.

If we look at this event we can see the Grid View nicely packages for us the new values, old values and the keys for the updating row.

From there you can get at its properties including Your answer might not have applied to the OP's question but it helped me out. When you use a Template Field and bind literal text to it like you are doing, will actually insert a control FOR YOU! You can see this if you look in the debugger near your line of code that is getting the empty text. ------- Unable to cast object of type ' System.

I was trying to get the value of a password-mode Text Box field contained in a Template Field in a Grid View so I could assign asterisks in the Text Box on Row Data Bound (default behavior is to show nothing in password-mode Text Boxes). So, to access the information without changing your template to use a control, you would cast like this: just wanted to comment on your solution.

First, I load up some data: After that, I’m doing some work to make my Grid View look beautifull, adding all columns by hand.