/// <summary>
/// Adds a value to the end of a collection.
/// </summary>
public static void AddToCollection(Type collectionType, object collectionInstance, XamlPropertyValue newElement)
{
IAddChild addChild = collectionInstance as IAddChild;
if (addChild != null)
{
if (newElement is XamlTextValue)
{
addChild.AddText((string)newElement.GetValueFor(null));
}
else
{
addChild.AddChild(newElement.GetValueFor(null));
}
}
else if (collectionInstance is IDictionary)
{
object val = newElement.GetValueFor(null);
object key = newElement is XamlObject ? ((XamlObject)newElement).GetXamlAttribute("Key") : null;
if (key == null || (key as string) == "")
{
if (val is Style)
{
key = ((Style)val).TargetType;
}
}
if (key == null || (key as string) == "")
{
key = val;
}
((IDictionary)collectionInstance).Add(key, val);
}
else
{
collectionType.InvokeMember(
"Add", BindingFlags.Public | BindingFlags.InvokeMethod | BindingFlags.Instance,
null, collectionInstance,
new object[] { newElement.GetValueFor(null) },
CultureInfo.InvariantCulture);
}
}
/// <summary>
/// Adds a value at the specified index in the collection.
/// </summary>
public static bool Insert(Type collectionType, object collectionInstance, XamlPropertyValue newElement,
int index)
{
object value = newElement.GetValueFor(null);
// Using IList, with possible Add instead of Insert, was primarily added as a workaround
// for a peculiarity (or bug) with collections inside System.Windows.Input namespace.
// See CollectionTests.InputCollectionsPeculiarityOrBug test method for details.
var list = collectionInstance as IList;
if (list != null)
{
if (list.Count == index)
{
list.Add(value);
}
else
{
list.Insert(index, value);
}
return(true);
}
else
{
var hasInsert = collectionType.GetMethods().Any(x => x.Name == "Insert");
if (hasInsert)
{
collectionType.InvokeMember(
"Insert", BindingFlags.Public | BindingFlags.InvokeMethod | BindingFlags.Instance,
null, collectionInstance,
new object[] { index, value },
CultureInfo.InvariantCulture);
return(true);
}
}
return(false);
}