Linq到通用列表C＃数据过滤问题

Question

我在C＃代码中执行linq查询时遇到问题。 我想排除具有jobChangeTypeId取消Unallocate或Delete但将它们带入结果集中的数据。

foreach (EmployeejobAudit empjobAudit in list)
{
     int iEmployeeServiceId = empjobAudit.EmployeeServiceId;

     PushNotificationData.jobAuditRow[] jobAuditList = empjobAudit.jobAuditList;

     var jobCallQuery = (from job in jobAuditList
                         where ((from dc in dataset.jobCall select dc.jobId).Contains(job.jobId)) && 
                        ( job.jobChangeTypeId != (int) Common.jobChangeTypeId.Unallocate  || job.jobChangeTypeId != (int) Common.jobChangeTypeId.Delete)                                   
                         select job).Distinct();

     if (jobCallQuery.Any())
     {
         foreach (var item in jobCallQuery)
         {
             System.Diagnostics.Debug.WriteLine("jobId {0}  Employee ServiceID {1} jobChange Type ID {2}", item.jobId, item.EmployeeServiceId, item.jobChangeTypeId);
         }
     }
}

Answer 1

如果您想同时排除两者，则它是AND而不是OR

foreach (EmployeejobAudit empjobAudit in list)
{
     int iEmployeeServiceId = empjobAudit.EmployeeServiceId;

     PushNotificationData.jobAuditRow[] jobAuditList = empjobAudit.jobAuditList;

     var jobCallQuery = (from job in jobAuditList
                         where ((from dc in dataset.jobCall select dc.jobId).Contains(job.jobId)) && 
                        ( job.jobChangeTypeId != (int) Common.jobChangeTypeId.Unallocate && job.jobChangeTypeId != (int) Common.jobChangeTypeId.Delete)                                   
                         select job).Distinct();

     if (jobCallQuery.Any()) //Useless because the following foreach will do it for you, but you can test if != null 
     {
         foreach (var item in jobCallQuery)
         {
             System.Diagnostics.Debug.WriteLine("jobId {0}  Employee ServiceID {1} jobChange Type ID {2}", item.jobId, item.EmployeeServiceId, item.jobChangeTypeId);
         }
     }
}

Answer 2

您正在|| 代替&& 。 问题是使用|| 这两个表达式之一将始终为真，因此将其包括在内。

这个：

job.jobChangeTypeId != (int) Common.jobChangeTypeId.Unallocate  
|| job.jobChangeTypeId != (int) Common.jobChangeTypeId.Delete

需要更改为：

job.jobChangeTypeId != (int) Common.jobChangeTypeId.Unallocate  
&& job.jobChangeTypeId != (int) Common.jobChangeTypeId.Delete