Question

I have retrieving data from DB which is something like that

ID - item ID  - State - type  - comment
===
1  - 158      -   0   - 114589- AAAAA    
2  - 158      -   1   - 108965- BBBBB    
3  - 159      -   1   - 100145- CCCCC    
4  - 159      -   0   - 100145- DDDDD    
5  - 159      -   1   - 114589- EEEEE    
6  - 162      -   0   - 100145- FFFFF    
7  - 162      -   1   - 108965- GGGGG

I need to return the result select item ID ,count the State grouped by item ID, state , type and comment

how can I do this using LINQ?

Answer 1

var grouped = from x in yourList
             group by new {x.itemID, x.type ,x.comment };

var counts = grouped.Select(x=>new {key = x.Key, count = x.Count());