public bool OnSet(PropertyInterceptionInfo propertyInterceptionInfo, object oldValue, object newValue)
{
if (ComparerUtils.Equals(oldValue, newValue))
{
throw new Exception("");
}
return(false);
}
public void OnGet(PropertyInterceptionInfo propertyInterceptionInfo, object value)
{
if (ComparerUtils.Equals(value, (long)30))
{
propertyInterceptionInfo.SetValue(9999);
}
if (ComparerUtils.Equals(value, (double)66))
{
propertyInterceptionInfo.SetValue(78344.8f);
}
}
/// <summary>
/// Invokes the validation on the specified context with the specified parameters
/// </summary>
/// <param name="sender">The property that invoked the validation</param>
/// <param name="context">The viewmodel context that has to be validated</param>
/// <param name="propertyInfo">The <see cref="PropertyInfo"/> of the validated property</param>
/// <param name="value">The value of the property</param>
/// <returns>Has to return true on validation error otherwise false</returns>
protected override async Task <bool> OnValidateAsync(PropertyInfo sender, IValidatableViewModel context, PropertyInfo propertyInfo, object value)
{
// if the value is null, then we should return a validation successfull, so that it is
// possible to have non mandatory inputs
if (value == null)
{
return(false);
}
var secondProperty = context.GetType().GetPropertyEx(this.otherProperty);
if (secondProperty == null)
{
return(true);
}
var secondValue = secondProperty.GetValue(context);
if (sender == null)
{
await context.ValidateAsync(propertyInfo, secondProperty.Name);
}
if (value is SecureString && (secondValue is SecureString || secondValue == null))
{
var ssa = value as SecureString;
var ssb = secondValue as SecureString;
if (ssa.Length == 0 && ssb == null)
{
return(true);
}
if (ssa.Length != 0 && ssb == null)
{
return(false);
}
return(ssa.IsEqualTo(ssb));
}
if (secondValue == null)
{
return(false);
}
return(!ComparerUtils.Equals(value, secondValue));
}
/// <summary>
/// Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their types
/// </summary>
/// <param name="first">An <see cref="IEnumerable"/> to compare to second.</param>
/// <param name="second">An <see cref="IEnumerable"/> to compare to the first sequence.</param>
/// <returns>
/// true if the two source sequences are of equal length and their corresponding
/// elements are equal according to the default equality comparer for their type;
/// otherwise, false.
/// </returns>
/// <exception cref="ArgumentNullException">first or second is null.</exception>
public static bool SequenceEqual_(this IEnumerable first, IEnumerable second)
{
if (first == null)
{
throw new ArgumentNullException(nameof(first));
}
if (second == null)
{
throw new ArgumentNullException(nameof(second));
}
var firstCol = first as ICollection;
if (firstCol != null)
{
var secondCol = second as ICollection;
if (secondCol != null && firstCol.Count != secondCol.Count)
{
return(false);
}
}
/*
* Because we never know what is inside the IEnumerable, we have to assume that they are a colourful mix of any type.
* This means that this will be a very ineffective and slow comparisson, because we have to check every element for its type
* before we try to compare them.
*/
var e1 = first.GetEnumerator();
var e2 = second.GetEnumerator();
e1.Reset();
e2.Reset();
while (e1.MoveNext())
{
if (!(e2.MoveNext() && ComparerUtils.Equals(e1.Current, e2.Current)))
{
return(false);
}
}
return(!e2.MoveNext());
}
/// <summary>
/// Removes the first occurrence of a specific object from the <see cref="IEnumerable"/>
/// </summary>
/// <param name="items">The <see cref="IEnumerable"/> that may contain the object to remove</param>
/// <param name="itemToExcept">The object to remove from the <see cref="IEnumerable"/>. The value can be null for reference types.</param>
/// <returns>A new instance of the <see cref="IEnumerable"/> without the item specified by <paramref name="itemToExcept"/></returns>
/// <exception cref="ArgumentNullException"><paramref name="items"/> is null</exception>
public static IEnumerable Except_(this IEnumerable items, object itemToExcept)
{
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
var result = new List <object>();
foreach (var item in items)
{
if (!ComparerUtils.Equals(item, itemToExcept))
{
result.Add(item);
}
}
return(result);
}
