[英]How to write linq query in Entity Framework but my table includes foreign key?
I have a table it includes 3 foreign key field like that: 我有一个表,其中包含3个外键字段,例如:
My Table: Kartlar
我的桌子: 卡拉特
How can i write entity query with linq :? 如何使用linq编写实体查询:?
select * from Kartlar where RehberID=123 and KampanyaID=345 and BrimID=567
BUT please be careful I can not see RehberID, KampanyaID, BrimID in entity they are foreign keys. 但是请注意,在实体中我看不到RehberID,KampanyaID,BrimID是外键。 I should use entity key but how?
我应该使用实体密钥,但是如何使用?
Addding data into kartlar Table (RehberID, KampanyaID, BrimID) is ok. 可以将数据添加到kartlar表(RehberID,KampanyaID,BrimID)。 But which Kart'ID created?
但是,哪个Kart'ID创建了? I need to learn which Id created after adding data (RehberID,KampanyaID,BrimID) into Kartlar?
在将数据(RehberID,KampanyaID,BrimID)添加到Kartlar之后,我需要学习创建哪个ID?
public static List<Kartlar> SaveKartlar(int RehberID, int KampanyaID, int BrimID, string Notlar)
{
using (GenSatisModuleEntities genSatisCtx = new GenSatisModuleEntities())
{
Kartlar kartlar = new Kartlar();
kartlar.RehberReference.EntityKey = new System.Data.EntityKey("GenSatisModuleEntities.Rehber", "ID", RehberID);
kartlar.KampanyaReference.EntityKey = new System.Data.EntityKey("GenSatisModuleEntities.Kampanya", "ID", KampanyaID);
kartlar.BirimReference.EntityKey = new System.Data.EntityKey("GenSatisModuleEntities.Birim", "ID", BrimID);
kartlar.Notlar = Notlar;
genSatisCtx.AddToKartlar(kartlar);
genSatisCtx.SaveChanges();
List<Kartlar> kartAddedPatient;
kartAddedPatient = (from k in genSatisCtx.Kartlar
where k.RehberReference.EntityKey == RehberID &&
k.KampanyaReference.EntityKey == KampanyaID &&
k.BirimReference.EntityKey == BrimID
select k)
return kartAddedPatient ;
}
}
How can I do that? 我怎样才能做到这一点? I want to get data from Kartlar which data I added?
我想从Kartlar获取数据,我添加了哪些数据?
genSatisCtx.AddToKartlar(kartlar);
genSatisCtx.SaveChanges();
int newKartlarID = kartlar.KartID;//kartID or whatever you call your primary key
return newKartlarID;
after you save the object kartlar it gets a primary key that can be used afterwords hopefully this helps and also what language is kartlar???? 在保存对象kartlar之后,它会获得一个主键,该键可以在后记中使用,希望这会有所帮助,并且kartlar是什么语言?
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