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Adding a row programmaticaly?

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Leopard Supportperson
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Leopard Supportperson asked on 15 Nov 2007, 01:06 AM
Hi,
I bind a List<T> to the grid and get the items displayed properly. When I want to add a new item into the list of items, I do that from the code - so, a user presses 'Add' button, and in the code I actually add an instance of type T into the list. However, the grid does not get updated with that new row. This is the code I use to bind:

List<T> myList = whatever;
GridInstance.DataSource = myList;

When I add a new item:

myList.Add(new T());

If I check GridInstance.DataSource right after I add an instance into the list, then I can see that the DataSource refers to the updated list, but the UI stays the same...

What should I do to update the UI in this case? Thanks!

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Jack
Telerik team
answered on 15 Nov 2007, 12:20 PM
Hello Leopard Supportperson,

Thank you for writing us.

If you use a DataSet or a DataTable, RadGridView will automatically update itself if you make changes directly to the data source (adding, removing or changing data). 

However If you use custom business objects, such as List<T>, you must implement the IBindingList and the  INotifyPropertyChanged interfaces in order to notify the grid about any changes in your data source. A simple way to do this is to use BindingList<T> instead of List<T>.

Don't hesitate to contact us if you have other questions.

Greetings,
Jack
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