/// <summary>
/// Tries to convert the <paramref name="sourceCollection"/> to the type described by <paramref name="collectionDescriptor"/>.
/// </summary>
/// <param name="sourceCollection"></param>
/// <param name="collectionDescriptor"></param>
/// <param name="convertedCollection"></param>
/// <returns><c>true</c> if the <paramref name="sourceCollection"/> could be converted to the type described by <paramref name="collectionDescriptor"/>; otherwise, <c>false</c>.</returns>
private static bool TryConvertCollectionData([NotNull] object sourceCollection, [NotNull] CollectionDescriptor collectionDescriptor, out object convertedCollection)
{
try
{
var sourceCollectionType = sourceCollection.GetType();
// Already same type
if (collectionDescriptor.Type == sourceCollectionType)
{
convertedCollection = sourceCollection;
return(true);
}
convertedCollection = Activator.CreateInstance(collectionDescriptor.Type, true);
var sourceCollectionDescriptor = (CollectionDescriptor)TypeDescriptorFactory.Default.Find(sourceCollectionType);
foreach (var item in EnumerateCollection(sourceCollection, sourceCollectionDescriptor))
{
object obj;
if (!TypeConverterHelper.TryConvert(item, collectionDescriptor.ElementType, out obj))
{
// (optimistic) try to convert the remaining items
continue;
}
collectionDescriptor.Add(convertedCollection, obj);
}
return(collectionDescriptor.GetCollectionCount(convertedCollection) > 0);
}
catch (InvalidCastException) { }
catch (InvalidOperationException) { }
catch (FormatException) { }
catch (NotSupportedException) { }
catch (Exception ex) when(ex.InnerException is InvalidCastException)
{
}
catch (Exception ex) when(ex.InnerException is InvalidOperationException)
{
}
catch (Exception ex) when(ex.InnerException is FormatException)
{
}
catch (Exception ex) when(ex.InnerException is NotSupportedException)
{
}
// Incompatible type and no conversion available
convertedCollection = null;
return(false);
}
private static bool ConvertForCollection(CollectionDescriptor collectionDescriptor, [NotNull] ref object data)
{
if (CollectionDescriptor.IsCollection(data.GetType()))
{
if (!TryConvertCollectionData(data, collectionDescriptor, out data))
{
return(false);
}
}
else
{
object convertedData;
if (!TypeConverterHelper.TryConvert(data, collectionDescriptor.ElementType, out convertedData))
{
return(false);
}
var convertedCollection = Activator.CreateInstance(collectionDescriptor.Type, true);
collectionDescriptor.Add(convertedCollection, convertedData);
data = convertedCollection;
}
return(true);
}
/// <summary>
/// Reads and adds item to the collection.
/// </summary>
/// <param name="objectContext">The object context.</param>
/// <param name="elementType">Type of the element.</param>
/// <param name="collectionDescriptor">The collection descriptor.</param>
/// <param name="thisObject">The this object.</param>
/// <param name="index">The index.</param>
protected virtual void ReadAddCollectionItem(ref ObjectContext objectContext, Type elementType, CollectionDescriptor collectionDescriptor, object thisObject, int index)
{
var value = ReadCollectionItem(ref objectContext, null, elementType, index);
collectionDescriptor.Add(thisObject, value);
}
