Detecting validation errors in Silverlight 4
- by jkohlhepp
I'm using the new Silverlight 4 support for IDataErrorInfo. So I have a POCO object that has implemented the interface, and when a validation rule fires the Silverlight UI correctly shows the error. So that is all working fine.
The POCO object looks like this:
public class SomeDomainClass : IDataErrorInfo
{
public string SomeString { get; set; }
public string Error
{
get { return String.Empty; }
}
public string this[string columnName]
{
get
{
if (columnName == "SomeString" && PolicyNumber.Contains("%"))
return "SomeString cannot contain '%'. You'll ruin everything!!!";
return String.Empty;
}
}
}
However, I want to be able to detect whether or not there are any errors on the page. For example if I have a Save button and I want to disable it if there are errors, or display a message or something.
What is the best way to detect if there are existing validation errors on the page? Is there a facility for this based around the IDataErrorInfo support in Silverlight? Or do I have to track it in the domain model myself?
