Develop Reference

GROUP BY to List<> with Linq

I'm new to using Linq so I don't understand some things or its syntax. I want to group a list and then loop through it with foreach, like my logic below. Obviously my logic doesn't work.
My code:
var final = finalv.Union(finalc);
final = final.GroupBy(x => x.Clave);
foreach (var articulo in final)
{
Articulo articulo2 = new Articulo();
articulo2.ArtID = articulo.ArtID;
articulo2.Clave = articulo.Clave;
articulo2.ClaveAlterna = articulo.ClaveAlterna;
lista.Add(articulo2);
}

First, such usage is syntactically consistent with this overloaded method of GroupBy: GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>), and it will return a IEnumerable<IGrouping<TKey,TSource>> variable.
That means, if you run final.GroupBy(x => x.Clave), let's assume he returns finalWithGrouped, then finalWithGrouped.Key is the key and finalWithGrouped.ToList() is a collection of all variables with the same key(at here, it is with the same Clave).
And for your code, try this:
var final = finalv.Union(finalc);
var finalWithGrouped = final.GroupBy(x => x.Clave);
foreach (var articulosWithSameClavePair in finalWithGrouped)
{
var clave = articulosWithSameClavePair.Key;
var articulos = articulosWithSameClavePair.ToList();
foreach(var articulo in articulos)
{
Articulo articulo2 = new Articulo();
articulo2.ArtID = articulo.ArtID;
articulo2.Clave = articulo.Clave;
articulo2.ClaveAlterna = articulo.ClaveAlterna;
lista.Add(articulo2);
}
}
I suggest you read some examples of using GroupBy.

When you group a list, it will return a key and groued list and you are trying reach a single property of a list.
When you group an data, you can convert it to dictionary, It is not nessesary but better way for me. You can try this code:
var final = finalv.Union(finalc);
final = final.GroupBy(x => x.Clave).ToDictionary(s=> s.Key, s=> s.ToList();
foreach (var articulo in final)
{
foreach (var articuloItem in articulo.value)
{
Articulo articulo2 = new Articulo();
articulo2.ArtID = articuloItem.ArtID;
articulo2.Clave = articuloItem.Clave;
articulo2.ClaveAlterna = articuloItem.ClaveAlterna;
lista.Add(articulo2);
}
}

Sorting a list if internal list is empty

I have a list inside of another list. I need to add to the list only those elements whose internal list is not empty. The data is pulled from the server. The code contains 4 lists, Each inside of another - Companies - Shops - Campaigns - Coupons. I need to check if the Coupons list is not empty and add the elements related to that. I would be very thankfull if someone could help with that.
foreach (var row in Companies)
{
reportData.companies.Add(new Companies { ID = row.Id, name = row.BrandName });
var Shops = logicService.CompanyShopService.GetShopsByCompany(row.Id);
var Campaigns = logicService.CampaignService.GetCampaignsByCompany(row.Id);
foreach (var shop in Shops)
{
reportData.companies.Where(item => item.ID == shop.ClientID).FirstOrDefault().shops.Add(new Distribution_Shops { Id = shop.Id, Name = shop.Name });
var shop_campaigns = Campaigns.Where(item => item.ShopID == shop.Id);
foreach (var campaign in shop_campaigns)
{
var coupons = logicService.CouponsService.GetAllByCampaign(campaign.Id, false);
foreach (var company in reportData.companies)
{
foreach (var tmp_shop in company.shops)
{
if (tmp_shop.Id == shop.Id)
{
tmp_shop.campaigns.Add(new Distribution_Campaign { Id = campaign.Id, Name = campaign.CampaignName, coupons = coupons});
}
}
}
}
}
}

How can I create a list inside a list with a foreach in c# ?

In other words I need all the elements of list "Categories" to be the "Parent" and elements of list "commodities" be the children.
Example
public string GetCommodities()
{
List<dynamic> categories = new List<dynamic>();
List<dynamic> commodities = new List<dynamic>();
foreach (var comcat in QuickQuoteRepo.CommodityCategories.All().OrderBy(o => o.Order))
{
categories.Add(new
{
comcat.Category,
});
foreach (var com in comcat.Commodities.OrderBy(o => o.Name))
{
commodities.Add(new
{
com.Name,
});
}
}
var response = new JavaScriptSerializer().Serialize(commodities);
return response;
}
And see if it's possible to all commodities names inside each category, within this foreach.
I tried adding a dynamic list such as:
dynamic listOfElements = new { CAT = categories, COMM = commodities };
But it does't return elemnts as parents or dependency of categories. Is the same as adding
commodities.Add(new
{
comcat.Category,
com.Name,
});

public string GetCommodities()
{
List<dynamic> categoryCommodityList = new List<dynamic>();
foreach (var comcat in QuickQuoteRepo.CommodityCategories.All().OrderBy(o => o.Order))
{
var allCommodities = comcat.Commodities.OrderBy(o => o.Name).Select(com => com.Name).ToList();
categoryCommodityList.Add(new { Catagory = comcat.Category, Items = allCommodities } );
}
return new JavaScriptSerializer().Serialize(categoryCommodityList);
}

You class structure does not support parent-child relationships. I mean, if what you want is that each Category holds a list of commodities, then you would need something like this:
var result = from c in comcat
select new { Category = c, Commoddities = c.Commoddities};
This will return a hierarchy of Categories including all Commodities underneath it.
If you are just receiving a flat data set, then you need something like this:
var result = from c in comcat
select new { Category = c,
Commoddities = c.Where(x=>x.Category.Name == c.Name).Select(x=>x.Commodity) };
Hopefully you get the idea...

look for inner array ID ,sort it and loop outer array with the sorted ID

I have below code and there is reviewoutocme.ID which is unique identifier. how ever, We do not receive this in order. but I would like to sort all the requests in order based on this ID.
i.e. I want to look for reviewoutocme.ID and when reviewoutocme.ID=1, then loop RequestDetailsType Request first and so on..
how can I do that?
can we do something like that?
IList< ServiceReference2.service> serviceList = new List< ServiceReference2.service>();
foreach (RequestDetailsType Request in PatientRequest.Request.RequestDetailsList)
{
if (Request.ReviewOutcomes != null && Request.ReviewOutcomes .Length > 0)
{
foreach (ReviewOutcomeType reviewoutocme in Request.ReviewOutcomes)
{
var status = reviewoutocme.status.Value;
var dateofservice = reviewoutocme.fromDate;
ServiceReference2.service service = new ServiceReference2.service();
service.sequence=reviewoutocme.ID;
service.InitialReferralTemplate = Request.initialRequestFlag;
service.TotalUnits = Convert.ToInt32(Request.units);
service.DateOfService = dateofservice;
service.Status = status;
service.Sequence = Convert.ToInt32(Request.requestItemDetailSequence);
service.ServiceCategory = "REV";
serviceList.Add(service);
}
}
}

modify you code above as
IList< ServiceReference2.service> serviceList = new List< ServiceReference2.service>();
var lstSortedRequest = PatientRequest.Request.RequestDetailsList.OrderBy(x => x.ReviewOutcomes.Select(y => y.ReviewOutcomeType.Id)).ThenBy(x => x.RequestDetailType).ToList();
foreach (var Request in lstSortedRequest)
{
//process the request as you do in your question.
}
default ordering sequence is Ascending.

My rep is too low to comment.
Try:
var sortedList = reviewoutocme.OrderBy(x => x.ID).ToList();

querying existing ListView items with LINQ

The ListView I have populates through these loops resulting in four columns being filled
// Create a ResXResourceReader
ResXResourceReader rdr0 = new ResXResourceReader(textPath1.Text + ".resx");
ResXResourceReader rdr1 = new ResXResourceReader(textPath1.Text + ".es.resx");
ResXResourceReader rdr2 = new ResXResourceReader(textPath1.Text + ".fr.resx");
foreach (DictionaryEntry d in rdr0)
{
TransResource x = new TransResource();
x.id = d.Key.ToString();
x.en = d.Value.ToString();
resources.Add(x.id, x);
}
foreach (DictionaryEntry d in rdr1)
{
TransResource x = resources[d.Key.ToString()];
x.fr = d.Value.ToString();
}
foreach (DictionaryEntry d in rdr2)
{
TransResource x = resources[d.Key.ToString()];
x.es = d.Value.ToString();
}
foreach (TransResource x in resources.Values)
{
string[] row = { x.id, x.en, x.fr, x.es };
var listViewItem = new ListViewItem(row);
listResx.Items.Add(listViewItem);
}
What I want to do is query all of the results in this ListView against what is entered in textboxQuery. If any field in the entire listview contains the string from textboxQuery I want it to be displayed in a new listview (lets say listviewQueryresult). I've had many failed attempts at this but I know it is possible through LINQ.

Because ListView.Items implements IEnumerable, but does not implement IEnumerable<T> you have to cast it to IEnumerable<ListViewItem> first, to query it using LINQ to Objects:
var results = listResx.Items.Cast<ListViewItem>()
.Where(x => YourPredicate(x));
If any field in the entire listview contains the string from
textboxQuery I want it to then be displayed in a new listview (lets
say listviewQueryresult)
For that, the predicate would be just:
var results = listResx.Items.Cast<ListViewItem>()
.Where(x => x.Text.Contains(textboxQuery));