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

c# - How to [group by] the datatable and put the result in another datatable?

I have the following datatable :

id  name   name_in

 3   sys     sys

 5   con     con_r

 5   con     con_s

 5   con     con_g

I want to get the following datatable from it :

3    sys

5    con

How to do this?

I do the following

var groups = Process_dt.AsEnumerable()
    .GroupBy(r => r.Field<Int16>("id"));

but how to put the result in another datatable .

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)

Have you tried the Distinct() function of LINQ? Code sample:

var groups = (
    from DataRow row in Process_dt.AsEnumerable()
    select new { 
        id = row.Field<Int16>("id"), 
        name = row.Field<string>("name") 
        }
    ).Distinct();

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

...