Question

我曾经使用过抗药类,并沿用了LINQ 查询:

XPQuery<Students> objStudentQuery = new XPQuery<Students>(XpoDefault.Session);
XPQuery<ExamDetails> objExamDetailsQuery = new XPQuery<ExamDetails>(XpoDefault.Session);

var ExamDetails = from exm in objExamDetailsQuery
                          join student in objStudentQuery on exm.StudentId equals student.StudentId
                          select new { student.FirstName, student.LastName, exm.ExamName, exm.Marks, exm.Date };

但是,它留下了一个错误的说法。 “特定方法没有得到支持”

如何从使用XPO Persistance类的两张表格中获得数据?

增编

Answer 1

XPO does not provide capabilities to join data using standard SQL approaches. Instead, it provides an Associations concept. I suggest that you review the Specifics of joining data from multiple tables in XPO Knowledge Base article describing an XPO way of joining data.

友情链接