c# - 如果参数为空则排除条件

Question

我正在使用 LINQ 和 Lambda 获取数据，使用此查询有 2 个条件。是否可以在没有 if else 条件的情况下编写此逻辑 -

public List<Pallet> GetPallet(string palletID, string locationID)
{
    List<Pallet> data = new List<Pallet>();

    if (locationID != null)
        data = data.Where(x => x.PalletID == palletID && x.LocationID == locationID).ToList();
    else
        data = data.Where(x => x.PalletID == palletID).ToList();

    return data;
}

Answer 1

当然是:

public List<Pallet> GetPallet(string palletID, string locationID)
{
    List<Pallet> data = new List<Pallet>();
    data = data.Where(x => x.PalletID == palletID && (locationID == null || x.LocationID == locationID)).ToList();

    return data;
}