Question

我正在尝试创建一个多键字典，其中的值是可枚举的。目的是能够使用第一个键执行查找，如果没有匹配项，则可以使用第二个键进行花药查找。

到目前为止，这是我的解决方案：

public class MultipleKeyDictionary<TEmployeeIDKey, TBadgeNumberKey, TValue> : IEnumerable<TValue>
{
    private object m_data_lock = new object();
    private Dictionary<TBadgeNumberKey, TEmployeeIDKey> badgeNumberDictionary = new Dictionary<TBadgeNumberKey, TEmployeeIDKey>();
    private Dictionary<TEmployeeIDKey, TValue> empIDDictionary = new Dictionary<TEmployeeIDKey, TValue>();


    public void AddValue(TEmployeeIDKey empIDKey, TBadgeNumberKey badgeKey, TValue value)
    {
        lock (m_data_lock)
        {
            badgeNumberDictionary[badgeKey] = empIDKey;
            empIDDictionary[empIDKey] = value;
        }
    }

    public TValue getByBadgeNumber(TBadgeNumberKey badgeKey)
    {
        lock (m_data_lock)
            return empIDDictionary[badgeNumberDictionary[badgeKey]];
    }

    public TValue getByEmployeeID(TEmployeeIDKey empIDKey)
    {
        lock (m_data_lock)
            return empIDDictionary[empIDKey];
    }


    public bool TryGetValueByEmployeeID(TEmployeeIDKey empIDKey, out TValue value)
    {

        return empIDDictionary.TryGetValue(empIDKey, out value);

    }

    public bool TryGetValueByBadgeKey(TBadgeNumberKey badgeNumberKey, out TValue value)
    {
        value = default(TValue);

        if (badgeNumberDictionary.TryGetValue(badgeNumberKey, out TEmployeeIDKey empIDKey))
        {
            return empIDDictionary.TryGetValue(empIDKey, out value);
        }

        return false;
    }


    public IEnumerator<TValue> GetEnumerator()
    {
        return empIDDictionary.Values.GetEnumerator();
    }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return this.GetEnumerator();
    }
  }

问题在于EmployeeID和BadgeNumber或它们两者都可能为空。如果其中一个键可以为null，如何修改它以便执行所需的查找？

编辑： 这是我用来执行查找的代码，其中gateLogGroups是一组由BadgeNumber和EmployeeID分组的Gate Logs，而invoiceRecords属于MultipleKeyDictionary类 < / p>

        foreach (var cardNumberGroup in gateLogGroups)
        {
            invoiceRecords.TryGetValueByEmployeeID(cardNumberGroup.Key.EmpIDNum, out InvoiceRecord invoiceRecord);

            if (invoiceRecord == null)
            {
                invoiceRecords.TryGetValueByBadgeKey(cardNumberGroup.Key.CardNumber, out invoiceRecord);

                if (invoiceRecord == null)
                {
                    exceptions.Add(new GateLogWithNoMatchingInvoiceException(cardNumberGroup.GateLogs.ElementAt(0), invoiceRecords.ElementAt(0).InvoiceHeaderId));
                    continue;
                }
            }

多键字典，其中任一键可以为空

0 个答案: