public static void AddProperty <T>(this PropertyTarget target, string key, string displayName, string description, T initialValue, T[] standardValues = null)
{
DynTypeDescriptor.InstallTypeDescriptor(target);
var td = DynTypeDescriptor.GetTypeDescriptor(target);
if (td == null)
{
throw new Exception("Could not load type descriptor");
}
var pd = new DynPropertyDescriptor(target.GetType(), key, typeof(T), initialValue
, new BrowsableAttribute(true)
, new DisplayNameAttribute(displayName)
, new DescriptionAttribute(description)
);
if (standardValues != null && standardValues.Length > 0)
{
pd.Attributes.Add(new TypeConverterAttribute(typeof(DynStandardValueConverter)), true);
foreach (var value in standardValues)
{
var sv = new DynStandardValue(value);
sv.DisplayName = value.ToString();
pd.StandardValues.Add(sv);
}
}
td.GetProperties().Add(pd);
}
public static bool InstallTypeDescriptor(object instance)
{
CleanUpRef();
if ((from DictionaryEntry de in TypeDescriptorTable select de.Key as WeakReference).Any(wr => wr != null && (wr.IsAlive && instance.Equals(wr.Target))))
{
return(false); // because already installed
}
// will have to install the provider and create a new entry in the hash table
var parentProvider = TypeDescriptor.GetProvider(instance);
var parentCtd = parentProvider.GetTypeDescriptor(instance);
var ourCtd = new DynTypeDescriptor(parentCtd, instance);
var ourProvider = new TypeDescriptionProvider(parentProvider, ourCtd);
TypeDescriptor.AddProvider(ourProvider, instance);
var weakRef = new WeakReference(instance, true);
TypeDescriptorTable.Add(weakRef, ourCtd);
return(true);
}