private PreviewInvokeEventArgs OnPreviewInvoke()
{
var args = new PreviewInvokeEventArgs();
var h = this.PreviewInvoke;
if (h != null)
{
h(this, args);
}
return(args);
}
private void AssociatedObjectPreviewInvoke(object sender, PreviewInvokeEventArgs e)
{
try
{
var comparerType = typeof(Comparer <>).MakeGenericType(this.Lhs.GetType());
var defaultProperty = comparerType.GetTypeInfo().GetDeclaredProperty("Default");
var comparer = (IComparer)defaultProperty.GetValue(null);
var comparerResult = comparer.Compare(this.Lhs, System.Convert.ChangeType(this.Rhs, comparerType));
switch (this.CompareOperator)
{
case Op.Eq:
e.Cancelling = !(comparerResult == 0);
break;
case Op.Gt:
e.Cancelling = !(comparerResult > 0);
break;
case Op.GtEq:
e.Cancelling = !(comparerResult >= 0);
break;
case Op.Lt:
e.Cancelling = !(comparerResult < 0);
break;
case Op.LtEq:
e.Cancelling = !(comparerResult <= 0);
break;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
e.Cancelling = true;
}
}