Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
497 views
in Technique[技术] by (71.8m points)

entity framework - Get Auto Identity Key after Insert via EF

Is there a straight forward way of retrieving a DB auto generated primary key when adding a record via Entity Framework 4.1?

For example:

dbcontext.Entity_Tables.Add(new Entity_Table { item1 = val1, item2 = val2 });
dbcontext.SaveChanges();
newPK = ???;

The SQL equivalent would be:

newPK = executeOnDB("INSERT INTO Entity_Table (item1, item2) VALUES (val1, val2);SELECT @@Indentity";);

BTW I'm using MySQL but the SQL would be the same as on MSSQL

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

I believe EF should update your entity object with the identity:

var entity = new Entity_Table { item1 = val1, item2 = val2 };
dbcontext.Entity_Tables.Add(entity);
dbcontext.SaveChanges();
int newPK = entity.ID;

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...