Here are the example files. Lukas Cenovsky wrote:
Hi Hall,I'm trying to make Silverlight 3 validation working with IronPython but it seems there is necessary a small manual step.I followed some tutorials and this should be enough:1) Set binding to: Mode=TwoWay, ValidatesOnExceptions=True, NotifyOnValidationError=True2) Raise Exception in the setter Then the control with bound property should became invalid.I tried it with TextBox and I failed - the control still appeared valid even when the exception was raised.The solution is to manually set the control into invalid state (based on BindingValidationError event) - see attached files for example.Does anybody know why the control is not set into invalid state automatically?-- -- Lukáš _______________________________________________ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
from System.Windows import Application
from System.Windows.Controls import UserControl
import clrtype
import pyevent
from System.ComponentModel import INotifyPropertyChanged,
PropertyChangedEventArgs
from System.Windows import VisualStateManager
from System.Windows.Controls import ValidationErrorEventAction
class ValidationClass(INotifyPropertyChanged):
__metaclass__ = clrtype.ClrClass
PropertyChanged = None
def __init__(self, win):
self.win = win
self._text = 'text'
self.PropertyChanged, self._propertyChangedCaller = pyevent.make_event()
def add_PropertyChanged(self, value):
self.PropertyChanged += value
def remove_PropertyChanged(self, value):
self.PropertyChanged -= value
def OnPropertyChanged(self, propertyName):
if self.PropertyChanged is not None:
self._propertyChangedCaller(self,
PropertyChangedEventArgs(propertyName))
@property
@clrtype.accepts()
@clrtype.returns(str)
def text(self):
return self._text
@text.setter
@clrtype.accepts(str)
@clrtype.returns()
def text(self, value):
if not value.startswith('text'):
self.win.FindName('tbError').Text = "value error"
raise Exception('value must start with text')
self.win.FindName('tbError').Text = ""
self._text = value
self.OnPropertyChanged('text')
class App:
def __init__(self):
self.root = Application.Current.LoadRootVisual(UserControl(),
"app.xaml")
self.root.DataContext = ValidationClass(self.root)
self.root.BindingValidationError += self.OnBindingValidationError
def OnBindingValidationError(self, sender, event):
if event.Action == ValidationErrorEventAction.Added:
VisualStateManager.GoToState(event.OriginalSource,
'InvalidUnfocused', True)
else:
VisualStateManager.GoToState(event.OriginalSource, 'Valid', True)
a = App()
app.xaml
Description: application/xaml
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