Silverlight Debugging Challenge

re: Silverlight Debugging Challenge

simon.ferquel — Tue, 06 May 2008 12:56:01 GMT

3 different options:

first one:

In AddressGrid_KeyDown:

if(e.Key == ....)

AddressGrid.DataContext = new Address{Location="...}

This will indicate to the DataBinding system that a change occured on the DataContext property (as we reset it).

second one:

In Address.cs:

Implement INotifyPropertyChanged, to notify changes on individual properties

third one (but I don't know if it works in Silverlight, as I'm not aware of differents with WPF):

at the end of AddressGrid_KeyDown, call the Update method on the Binding itself.

re: Silverlight Debugging Challenge

jesseliberty — Sat, 03 May 2008 20:29:44 GMT

Thomas,

there is a much simpler fix. The biz object is getting updated (you can see that in the debugger) but when it is, nothing happens at the UI.

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re: Silverlight Debugging Challenge

Thomas Lebrun — Fri, 02 May 2008 07:05:52 GMT

Hi Jesse,

I proposed this answer:

In AddressGrid_KeyDown, replace:

AddressGrid.DataContext = theAddress;

By:

if (!string.IsNullOrEmpty(theAddress.Address1) && !string.IsNullOrEmpty(theAddress.Address2) && !string.IsNullOrEmpty(theAddress.City) && !string.IsNullOrEmpty(theAddress.Location))

{

AddressGrid.DataContext = theAddress;

}

Also, add a little code to allow the Location TextBox to have the focus on Loaded.

Am I right ?

Thanks !

re: Silverlight Debugging Challenge

sariel — Thu, 01 May 2008 23:47:08 GMT

I added : INotifyPropertyChanged to the address class and now seems to be working

is this correct or have I over complicated it ?

No; you got it. Thanks! -jesse (I've obfuscaated your answer.)