/// <summary>
/// Initializes a new instance of the <see cref="ConfigSettingDropdownViewModel"/> class.
/// </summary>
/// <param name="item">Source item.</param>
public ConfigSettingDropdownViewModel(Setting item)
: base(item)
{
try
{
_dataProvider = TypeResolver.CreateConfigDataProviderInstance(item.Datasource, item.DatasourceAssembly);
}
catch (Exception ex)
{
var message = $"Could not resolve datasource. Datasource='{item.Datasource}', DatasourceAssembly='{item.DatasourceAssembly}'.";
throw new HotConfig.Error.InvalidConfiguration(message, ex);
}
var dataProviderType = _dataProvider.GetType();
if (typeof(IConfigDataProviderOnce).IsAssignableFrom(dataProviderType))
{
var onceProvider = (IConfigDataProviderOnce)_dataProvider;
Items = onceProvider.FetchData().Select(x => new DropdownItem()
{
Id = x.Key, Text = x.Value
}).ToList();
}
else if (typeof(IConfigDataProviderPoll).IsAssignableFrom(dataProviderType))
{
Items = new List <DropdownItem>();
_isPoll = true;
WaitingForFirstPollResult = true;
var pollProvider = (IConfigDataProviderPoll)_dataProvider;
pollProvider.DataItems.CollectionChanged += DataProviderPollCollectionChanged;
pollProvider.Start();
}
else
{
throw new HotConfig.Error.InvalidConfiguration("Settings dropdown doesn't implement a known interface.");
}
SelectedItem = Items.Where(x => x.Id == CurrentValue).FirstOrDefault();
}