private static bool Compare(object leftOperand, ComparisonConditionType operatorType, object rightOperand)
{
if (leftOperand != null && rightOperand != null)
{
rightOperand = TypeConverterHelper.Convert(rightOperand.ToString(), leftOperand.GetType().FullName);
}
IComparable comparable = leftOperand as IComparable;
IComparable comparable2 = rightOperand as IComparable;
if (comparable != null && comparable2 != null)
{
return(DataTriggerBehavior.EvaluateComparable(comparable, operatorType, comparable2));
}
switch (operatorType)
{
case ComparisonConditionType.Equal:
return(object.Equals(leftOperand, rightOperand));
case ComparisonConditionType.NotEqual:
return(!object.Equals(leftOperand, rightOperand));
case ComparisonConditionType.LessThan:
case ComparisonConditionType.LessThanOrEqual:
case ComparisonConditionType.GreaterThan:
case ComparisonConditionType.GreaterThanOrEqual:
if (comparable == null && comparable2 == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "InvalidOperands", new object[]
{
(leftOperand != null) ? leftOperand.GetType().Name : "null",
(rightOperand != null) ? rightOperand.GetType().Name : "null",
operatorType.ToString()
}));
}
if (comparable == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "InvalidLeftOperand", new object[]
{
(leftOperand != null) ? leftOperand.GetType().Name : "null",
operatorType.ToString()
}));
}
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "InvalidRightOperand", new object[]
{
(rightOperand != null) ? rightOperand.GetType().Name : "null",
operatorType.ToString()
}));
default:
return(false);
}
}
private static void OnValueChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args)
{
DataTriggerBehavior dataTriggerBehavior = (DataTriggerBehavior)dependencyObject;
if (dataTriggerBehavior.AssociatedObject == null)
{
return;
}
DataBindingHelper.RefreshDataBindingsOnActions(dataTriggerBehavior.Actions);
if (DataTriggerBehavior.Compare(dataTriggerBehavior.Binding, dataTriggerBehavior.ComparisonCondition, dataTriggerBehavior.Value))
{
Interaction.ExecuteActions(dataTriggerBehavior.AssociatedObject, dataTriggerBehavior.Actions, args);
}
}
