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10-Dec-2020 16:37

So far so good, this all works, the grid is displayed, the Drop Down List appears, filled with the correct data, shows the correct initial item and lets the user select another. The when trying to get the value from the Drop Down List in the Row Updating event, I cant find it. I create a Recursive Find Control method that ran through every control on the page, and it cant find it.

Ive tried peeking in the cell controls in the debugger and its just not there. Ive duplicated it in a simpler test page, with a test database.

The other solution is to drop that dynamic control creation and uses standard item and edit templates (declaratively in the aspx file) With just Build Grid() called, then the ddl is null.

Unfortunatley, I can't drop the dynamic creation, as this app is used to maintain three different systems, and being defined by an XML configuration file, means that the page can be used to maintain multiple tables.

Conclusion Here in gridview, in the beginning the major part is to make the decision of putting either a bound field or a template field and the answer is simple: When we want to place any control inside the gridview then we can go for template field, otherwise bound field will be simpler.

I hope the above information wa a little bit helpful for you, kindly let me know your valuable feedback or thoughts.

But ensure that the control/link is inside the gridview, only then can we cast sender as grid view.

This code is a bit complex but just add it knowing that we may refer to it in the future.

This enables you to provide an event-handling method that performs a custom routine, such as canceling the update operation, whenever this event occurs.How do I get the old values in a gridview row in the row_updating event? But it doesn't work for index items greater than 0. Must be non-negative and less than the size of the collection. I'm using a sqldatasource control to populate the grid and want to write the update code in the Row Updating event. I can get the value of the first field using string old_Category = e. this is the function that is called by all control when sending information to the server.

So, you could use it in the javascript onchange event.After investigation, it looks like the Selected Index Changed is not called because on the postback with update, the Drop Down List doesn't exists, therefore the event doesn't exist.