I am so frustrated with Silverlight now. Please bare with me.
In the Web site I have:
I have an INVOKE query some things like IsCountryExist(CountryName as string) and return true or false. The query is in the domainservice.vb file.
In the Client site I have:
in XAML, a textbox, when it lost focus, it call the INVOKE IsCountryExists( what ever user type in). Let says it returns back false that means there is no such Counry. This is where I got stuck. How do tell the Silverlight there is an error?
Please vb codes, if it is C# it is even more confusion. Or is there any place does have step-by-step to do it?
Thank you