private static void OnBindingValuePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var field = (FeatureDataField)d;
// if require information is missing return.
if (string.IsNullOrEmpty(field.FieldName) || field.GeodatabaseFeature == null
|| field.GeodatabaseFeature.Attributes == null)
{
field.ValidationException = null;
return;
}
#if !NETFX_CORE
// WPF will raise this event even if the new value
// is same as old value. WinRT and WP8 will only
// raise this event if the new value is not the same
// as the old value. This code is to enusre equality
// in behavior accross all platforms.
if (AreEqual(e.NewValue, e.OldValue))
{
// clear out any previous validation exception.
field.ValidationException = null;
return;
}
#endif
// Update the UI controls data context object to the current value.
if (field._dataItem != null && !AreEqual(field._dataItem.Value,e.NewValue))
{
field._dataItem.Value = (field._dataItem is SelectorDataItem)
? ((SelectorDataItem) field._dataItem).SelectItem(e.NewValue)
: field._dataItem.Value = e.NewValue;
}
var oldValue = field.GeodatabaseFeature.Attributes.ContainsKey(field.FieldName)
? field.GeodatabaseFeature.Attributes[field.FieldName]
: null;
if ( AreEqual(oldValue, field.BindingValue))
{
// clear out any previous validation exception.
field.ValidationException = null;
return;
}
// if value changing event is subscribed to raise event.
if (field.ValueChanging != null)
{
var changing = new ValueChangingEventArgs(oldValue, field.BindingValue);
// raise value changing event.
field.ValueChanging(field, changing);
// if ValueChangeEventArgs return with the validation exception property
// set then the user has indicated that the new value doesn't not meet
// some user defined validation requirement and the validation state
// should be trigger with the provided Exception.
if (changing.ValidationException != null)
{
// Set the users exception to the FeatureDataField.ValidationException property.
// This will trigger the validation state.
field.ValidationException = changing.ValidationException;
return;
}
}
#if NETCORE_FX
// clear out any previous validation exception.
form.ValidationException = null;
#endif
// Attempt to update the new value back to the GeodatabaseFeature
var success = field.CommitChange(field.BindingValue);
// if the ValueChanged event is subscribed to and the committed value was
// successfully pushed back to the GeodatabaseFeature then rais the ValueChanged Event.
if (field.ValueChanged != null && success)
field.ValueChanged(field, new ValueChangedEventArgs(oldValue, field.BindingValue));
field.OnPropertyChanged("BindingValue");
}
private static void OnBindingValuePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var field = (FeatureDataField)d;
// if require information is missing return.
if (string.IsNullOrEmpty(field.FieldName) || field.GeodatabaseFeature == null ||
field.GeodatabaseFeature.Attributes == null)
{
field.ValidationException = null;
return;
}
#if !NETFX_CORE
// WPF will raise this event even if the new value
// is same as old value. WinRT and WP8 will only
// raise this event if the new value is not the same
// as the old value. This code is to enusre equality
// in behavior accross all platforms.
if (AreEqual(e.NewValue, e.OldValue))
{
// clear out any previous validation exception.
field.ValidationException = null;
return;
}
#endif
// Update the UI controls data context object to the current value.
if (field._dataItem != null && !AreEqual(field._dataItem.Value, e.NewValue))
{
field._dataItem.Value = (field._dataItem is SelectorDataItem)
? ((SelectorDataItem)field._dataItem).SelectItem(e.NewValue)
: field._dataItem.Value = e.NewValue;
}
var oldValue = field.GeodatabaseFeature.Attributes.ContainsKey(field.FieldName)
? field.GeodatabaseFeature.Attributes[field.FieldName]
: null;
if (AreEqual(oldValue, field.BindingValue))
{
// clear out any previous validation exception.
field.ValidationException = null;
return;
}
// if value changing event is subscribed to raise event.
if (field.ValueChanging != null)
{
var changing = new ValueChangingEventArgs(oldValue, field.BindingValue);
// raise value changing event.
field.ValueChanging(field, changing);
// if ValueChangeEventArgs return with the validation exception property
// set then the user has indicated that the new value doesn't not meet
// some user defined validation requirement and the validation state
// should be trigger with the provided Exception.
if (changing.ValidationException != null)
{
// Set the users exception to the FeatureDataField.ValidationException property.
// This will trigger the validation state.
field.ValidationException = changing.ValidationException;
return;
}
}
#if NETCORE_FX
// clear out any previous validation exception.
form.ValidationException = null;
#endif
// Attempt to update the new value back to the GeodatabaseFeature
var success = field.CommitChange(field.BindingValue);
// if the ValueChanged event is subscribed to and the committed value was
// successfully pushed back to the GeodatabaseFeature then rais the ValueChanged Event.
if (field.ValueChanged != null && success)
{
field.ValueChanged(field, new ValueChangedEventArgs(oldValue, field.BindingValue));
}
field.OnPropertyChanged("BindingValue");
}
