在Linq查询中对项目进行分组

Question

I'm trying to group a result set of ektron search results items and output them on screen, I use the following code

var groupdResults = 
    from result in response.Results
    orderby result[SearchSmartFormProperty.GetDateProperty("/root/FundClosingDate")]
    group result by result[SearchSmartFormProperty.GetStringProperty("/root/DeadlineAltText")] 
    into statusGroup
    select new 
    { 
        closingDate =statusGroup.Key,
        count= statusGroup.Count
    };

I then add these to a listview: uxSearchResultView.DataSource = groupdResults;

The problem I'm having is that i need to output all the data from the resultset eg title,closingdate, etc.., It currently only outputs, eg Closing 2 open 1

really appreciate any help anyone can offer

-----------------------Updated------------------------------------- I think i have a working solution now, but its kind of messy

var groupdResults = from result in response.Results
                                orderby result[SearchSmartFormProperty.GetDateProperty("/root/FundClosingDate")]
                                group result by result[SearchSmartFormProperty.GetStringProperty("/root/DeadlineAltText")] 
                                into statusGroup
                                    select new 
                                    {
                                        closingDate = statusGroup.Key,
                                        count = statusGroup.Count(),
                                        items = statusGroup.ToList()
                                    };
    List<Ektron.Cms.Search.SearchResultData> SRDATA = new List<Ektron.Cms.Search.SearchResultData>();
            foreach (var result in groupdResults)
            {
                for (int i = 0; i < result.items.Count; i++)
                {
                    SRDATA.Add(result.items[i]);
                }
            }

Any input as to a cleaner implementation? thanks

Answer 1

You can do following:

select new 
{ 
    closingDate =statusGroup.Key,
    count= statusGroup.Count(),
    items = statusGroup.ToList()
};

items property will contain items that were assigned to that group in a List .

Answer 2

Rather than using anonymous types I would put that into a new object.

var groupdResults = 
from result in response.Results
orderby result[SearchSmartFormProperty.GetDateProperty("/root/FundClosingDate")]
group result by result[SearchSmartFormProperty.GetStringProperty("/root/DeadlineAltText")] 
into statusGroup
select new ResultObject
{ 
    closingDate = statusGroup.First().ClosingDate,
    ....
};

Answer 3

(Modified)

I think you need a class to capture your results:

class GroupResult
{
    public string Status { get; set; }
    public ICollection<SearchResultData> Items { get; set; }
}

The grouping statusGroup is an IEnumerable of your items, so you can do:

var groupdResults = 
    from result in response.Results
    group result by result[SearchSmartFormProperty.GetStringProperty("/root/DeadlineAltText")] 
    into statusGroup
    select new GroupResult
    { 
        Status =statusGroup.Key,
        Items = statusGroup.ToList()
    }.ToList();

After that you can display the Items in any way you wish, like sorted by Status and the Items sorted by ClosingDate .

But maybe it is enough to just sort response.Results by status and then by closing date.