public Stock GetStockBySymbol(string symbol)
{
if (string.IsNullOrWhiteSpace(symbol))
{
throw new ArgumentNullException("smybol");
}
using (var context = ContainerHelper.Instance.Resolve<IRepositoryContext>())
{
try
{
var repository = new StockRepository(context);
return repository.GetStockBySymbol(symbol);
}
catch
{
//这里可能会因为Repository<Stock>.Single()找不到记录抛出异常
return null;
}
}
}