public static Func <Transaction, bool> CreateTransactionFilter(string currencyCode, DateTime?dateFrom,
DateTime?dateTo, string status)
{
ExpressionStarter <Transaction> predicate = PredicateBuilder.New <Transaction>(true);
if (!string.IsNullOrEmpty(currencyCode))
{
predicate = predicate.And(c => c.CurrencyCode == currencyCode);
}
if (dateFrom != null)
{
predicate = predicate.And(c => c.TransactionDate.CompareTo(dateFrom.Value) >= 0);
}
if (dateTo != null)
{
predicate = predicate.And(c => c.TransactionDate.CompareTo(dateTo.Value) <= 0);
}
if (!string.IsNullOrEmpty(status) && Enum.IsDefined(typeof(TransactionStatusEnum), status))
{
predicate = predicate.And(c =>
c.TransactionStatus == (TransactionStatusEnum)Enum.Parse(typeof(TransactionStatus), status));
}
return(predicate.Compile());
}