如何使用实体框架进行 JOIN

Question

我怎样才能将Join 与另一个Entity 联系起来？

我有这个，

IEnumerable<EntityNetimoveis.San_Imovel> im = db.San_Imovel.Where(a => a.Credenciada_Id.Equals(10));

我想要一个JOIN 和San_Imovel_Caracteristica。主键和外键称为Imovel_Id

我试试这个

IEnumerable<EntityNetimoveis.San_Imovel> im = db.San_Imovel.Join.(IEnumerable<EntityNetimoveis.San_Imovel_Caracteristica>, i => imovel_id, a => imovel_Id).Where(a => a.Credenciada_Id.Equals(10));

但这是一个错误的代码。有语法错误。

Answer 1

基本上加入就是这样的。

var im = 
db.San_Imovel.Join(db.San_Imovel_Caracteristica, i => i.imovel_id, a => a.imovel_Id, (i, a) => a)
.Where(a => a.Credenciada_Id.Equals(10));

编辑：

例如，

var result = db.ATable
.Where(a => a.Name == 'test')
.Join(db.BTable, a => a.Id, b => b.Id, (a, b) => a);

Answer 2

有一个“。”在加入之后不应该在那里

Answer 3

var query = from EntityNetimoveis.San_Imovel i in db.San_Imovel
    join EntityNetimoveis.San_Imovel_Caracteristica c in db.San_Imovel_Caracteristica on i.imovel_id equals c.imovel_Id
    select i;

return query.ToList();