private UserInputLookup Load(IUserInputLookupOwner owner, string lookupName)
{
var filename = GetUserInputLookupFileName(lookupName);
var lookup = new UserInputLookup(owner, lookupName);
string json;
try
{
json = File.ReadAllText(filename);
}
catch (FileNotFoundException)
{
return(lookup);
}
try
{
lookup = JsonConvert
.DeserializeObject <UserInputLookup>(json);
lookup.Owner = owner;
}
catch (JsonSerializationException ex)
{
lookup.SelectedItem = ex.Message;
return(lookup);
}
lookup.Name = lookupName;
foreach (var value in lookup)
{
lookup.Add(value);
}
return(lookup);
}
public IUserInputLookup Get(
IUserInputLookupOwner owner, string lookupName, string selectedItem)
{
var value = Get(owner, lookupName);
value.SelectedItem = selectedItem;
return(value);
}
public IUserInputLookup Get(IUserInputLookupOwner owner, string lookupName)
{
if (string.IsNullOrEmpty(lookupName))
{
return(UserInputLookup.Empty);
}
var value = GetInstance(owner, lookupName);
value.IsPropertyChangedNotificationEnabled = true;
return(value);
}
private UserInputLookup GetInstance(
IUserInputLookupOwner owner, string lookupName)
{
UserInputLookup value;
if (!_registry.ContainsKey(lookupName))
{
value = Load(owner, lookupName);
_registry.Add(lookupName, value);
value.CollectionChanged += OnLookupCollectionChanged;
}
else
{
value = _registry[lookupName];
}
return(value);
}
