/// <summary>
/// This takes the name of another field in the model and that fields expected value.
/// If the dependentProperty equals the targetValue then return valid.
/// </summary>
/// <param name="dependentProperty">The name of the field to check</param>
/// <param name="targetValue">The expected value of the passed in field</param>
public RequiredIfAttribute(object dependentProperty, object targetValue)
{
_innerAttribute = new RequiredAttribute();
this.DependentProperty = dependentProperty;
this.TargetValue = targetValue;
//If we have just a string then add it to an array. Otherwise if our object is already
//an array then cast the object as an array
if (DependentProperty.GetType().IsArray)
{
DependentPropertyArray = ((IEnumerable)DependentProperty).Cast <object>().Select(x => x.ToString()).ToArray();
}
else if (DependentProperty.GetType().ToString() == "System.String")
{
String DependentPropertyString = (String)DependentProperty;
DependentPropertyArray = new String[1] {
DependentPropertyString
};
}
if (TargetValue.GetType().IsArray)
{
TargetValueArray = ((IEnumerable)TargetValue).Cast <object>().Select(x => x.ToString()).ToArray();
}
else
{
TargetValueArray = new object[1] {
TargetValue
};
}
}
public void AddDependentProperty(PropertyBinding.PropertyPath prop, Action handler)
{
var dependentProperty = new DependentProperty(prop, handler);
dependentProperty.Prop.AddHandler(_value, dependentProperty.Handler);
_dependents.Add(dependentProperty);
}
public void AddDependentProperty(INPCBinding.PropertyPath prop, PropertyChangedEventHandler handler)
{
var dependentProperty = new DependentProperty(prop, handler);
dependentProperty.Prop.AddHandler(_value, dependentProperty.Handler);
_dependents.Add(dependentProperty);
}
/// <summary>
/// Adds a dependent property of a property; that is, a property whose changes will be monitored to refresh the <see cref="TransformedCollection"/>.
/// </summary>
public void AddDependentProperty(Func <T, INotifyPropertyChanged> selector, string propertyName)
{
var depProp = new DependentProperty(propertyName, selector, Item_PropertyChanged);
this._depProps.Add(depProp);
foreach (var item in this._source)
{
depProp.Register(item);
}
}
private object GetDependentPropertyValue(object container)
{
var currentType = container.GetType();
var value = container;
foreach (string propertyName in DependentProperty.Split('.'))
{
var property = currentType.GetProperty(propertyName);
value = property.GetValue(value, null);
currentType = property.PropertyType;
}
return(value);
}
private static IEnumerable <MemberDeclarationSyntax> GetGeneratedMember(DependentProperty p)
{
var source = string.Format(@" public {1} {0} => _value.{0};
private static readonly PropertyChangedEventArgs {0}Property = new PropertyChangedEventArgs(" + NameOf(p) + @");
",
p.Name, p.Type.WithoutTrivia().GetText().ToString());
var generatedNodes = CSharpSyntaxTree.ParseText(source)
.GetRoot().ChildNodes()
.OfType <MemberDeclarationSyntax>()
.ToArray();
return(generatedNodes);
}
private object GetDependentPropertyValue(object container)
{
if (container == null)
{
throw new ArgumentNullException(nameof(container));
}
var currentType = container.GetType();
var value = container;
foreach (string propertyName in DependentProperty.Split('.'))
{
var property = currentType.GetProperty(propertyName);
if (property != null)
{
value = property.GetValue(value, null);
currentType = property.PropertyType;
}
}
return(value);
}
private static string NameOf(DependentProperty p) => NameOf(p.Name, p.Options.IsCsharp6);
