Question

我有代码，我按照机会编号对我的要求进行分组，如下所示：

        List<Requirement> result = requirements
                                    .GroupBy(l => l.CRMOpportunityNumber)
                                    .Select(cl => new Requirement
                                    {
                                        CRMOpportunityNumber = cl.First().CRMOpportunityNumber,
                                        OpportunityTitle = cl.First().OpportunityTitle,
                                        ClientName = cl.First().ClientName,
                                        TentativeStartDate = cl.Min(c => c.TentativeStartDate),
                                        TotalPositions = cl.Sum(c => c.Required),
                                        RegionName = cl.First().RegionName,
                                        TotalCVProposed = cl.Sum(c => c.Associates.Count),
                                        TotalDeployed = cl.Sum(c => c.Associates.Count(x => x.IsIdentified == true)),
                                        NetGap = cl.Sum(c => c.Required) - cl.Sum(c => c.Associates.Count(x => x.IsIdentified == true)),
                                    }).OrderByDescending(l => l.CRMOpportunityNumber).ToList();

现在我不想在分组（结果）中包含那些要求所有CATEGORY字段值等于“work startedd”的要求。

需求类有一个字段类别。

Answer 1

在分组前使用Where子句排除'Work Commenced'类别

    List<Requirement> result = requirements
                                .Where(r => r.Category != "work commenced")
                                .GroupBy(l => l.CRMOpportunityNumber)
                                .Select(cl => new Requirement
                                {
                                    CRMOpportunityNumber = cl.First().CRMOpportunityNumber,
                                    OpportunityTitle = cl.First().OpportunityTitle,
                                    ClientName = cl.First().ClientName,
                                    TentativeStartDate = cl.Min(c => c.TentativeStartDate),
                                    TotalPositions = cl.Sum(c => c.Required),
                                    RegionName = cl.First().RegionName,
                                    TotalCVProposed = cl.Sum(c => c.Associates.Count),
                                    TotalDeployed = cl.Sum(c => c.Associates.Count(x => x.IsIdentified == true)),
                                    NetGap = cl.Sum(c => c.Required) - cl.Sum(c => c.Associates.Count(x => x.IsIdentified == true)),
                                }).OrderByDescending(l => l.CRMOpportunityNumber).ToList();

修改

如果要排除所有要求都属于“工作开始”类别的群组，请执行以下操作：

List<Requirement> result = requirements .GroupBy(l => l.CRMOpportunityNumber) .Where(cl => cl.All(l => l.Category != "work commenced")) .Select(cl => new Requirement { CRMOpportunityNumber = cl.First().CRMOpportunityNumber, OpportunityTitle = cl.First().OpportunityTitle, ClientName = cl.First().ClientName, TentativeStartDate = cl.Min(c => c.TentativeStartDate), TotalPositions = cl.Sum(c => c.Required), RegionName = cl.First().RegionName, TotalCVProposed = cl.Sum(c => c.Associates.Count), TotalDeployed = cl.Sum(c => c.Associates.Count(x => x.IsIdentified == true)), NetGap = cl.Sum(c => c.Required) - cl.Sum(c => c.Associates.Count(x => x.IsIdentified == true)) }).OrderByDescending(l => l.CRMOpportunityNumber) .ToList();

Answer 2

如果该组中的所有项目的CATEGORY字段值等于＆＃34;工作已开始＆＃34;，则您要排除组。换句话说，如果组中的任何项目的值不是＆＃34;工作已开始＆＃34;，则您希望包含该组。这可以使用LINQ Any()来实现，如下所示：

List<Requirement> result = 
                    requirements.GroupBy(l => l.CRMOpportunityNumber)
                                .Where(g => g.Any(item => item.Category != "work commenced")
                                .Select(cl => new Requirement
                                {
                                    ......
                                }).OrderByDescending(l => l.CRMOpportunityNumber)
                                .ToList();

LINQ删除分组中具有特定值的项目

2 个答案: