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
322 views
in Technique[技术] by (71.8m points)

c# - AsNoTracking() and Include

I have a?Linq query that fetches an entity and?some of its navigation properties.

context.MyEntity
    .AsNoTracking()
    .Include(i=> i.Nav1)
    .Include(i=> i.Nav2)
    .Where(x=> x.Prop1==1)
    .FirstOrDefault();

my question is:

Is the above query enough to not track MyEntity nor the navigation properties NAv1& Nav2 or must I add AsNoTracking for each navigation?property?

like this: ?

context.MyEntity
    .AsNoTracking()
    .Include(i=> i.Nav1)
    .AsNoTracking()
    .Include(i=> i.Nav2)
    .AsNoTracking()
    .Where(x=> x.Prop1==1)
    .FirstOrDefault();
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)

Use AsNoTracking after you have completed all your query parameters but before you move the data into memory. In this example, you'll want:

context.MyEntity
    .Include(i=> i.Nav1)
    .Include(i=> i.Nav2)
    .Where(x=> x.Prop1==1)
    .AsNoTracking()
    .FirstOrDefault();

Any child objects of the parent entity will not be tracked.


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

...