Question

我想知道是否有办法使用int数组创建连接的WHERE子句。我需要得到整个数组的结果。我可以这样做：

public ViewResult Results(int? programId, int? programYear, int? programTypeId, string toDate, string fromDate, int?[] programTypeIdList, int?[] programIdList)
{
    surveyResponseRepository.Get().Any(x => x.ProgramId == programIdList);
}

Answer 1

使用Contains：

surveyResponseRepository.Get().Any(x => programIdList.Contains(x.ProgramId));

虽然这会告诉您任何结果是否符合该标准。

我怀疑你想使用Where代替Any：

surveyResponseRepository.Get().Where(x => programIdList.Contains(x.ProgramId));

另外，为什么使用可以为空的int数组呢？如果您尝试使参数可选，只需将其保留为常规int的数组并检查null：

public ViewResult Results(int? programId, int? programYear, int? programTypeId, string toDate, string fromDate, int[] programTypeIdList, int[] programIdList)
{
    return surveyResponseRepository.Get()
        .Where(x => programIdList == NULL 
                    || programIdList.Contains(x.ProgramId));

}

Answer 2

你可以这样做：

public ViewResult Results(int? programId, int? programYear, int? programTypeId, string toDate, string fromDate, int?[] programTypeIdList, int?[] programIdList) 
{
     surveyResponseRepository.Get().Where(x => programIdList.HasValue && programIdList.Value.Contains(x.ProgramId)); 
}

带有字符串数组的Concatenated Where子句

2 个答案: