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Adding with Linq


Adding with Linq

By : user2949547
Date : November 17 2020, 01:00 AM
this one helps. I have two collections of MontlySales where each instance has three properties: int Year, string Month and double Sales. , Try this:-
code :
List<MontlySales> result = coll1.Concat(coll2)
                  .GroupBy(x => new { x.Year, x.Month })
                  .Select(x => new MonthlySales
                  {
                      Year = x.Key.Year,
                      Month = x.Key.Month,
                      Sales = x.Sum(z => z.Sales)
                  }).ToList();
public class MonthlySales
{
   public int Year { get; set; }
   public string Month { get; set; }
   public Dictionary<string, double> Sales { get; set; }
}
List<MonthlySales> result = col1.Concat(col2)
     .SelectMany(x => x.Sales, (monthhlySalesObj, sale) => 
                  new { monthhlySalesObj.Year, monthhlySalesObj.Month, sale })
     .GroupBy(x => new { x.Year, x.Month, ProductName = x.sale.Key })
     .Select(x => new MonthlySales
     {
        Year = x.Key.Year,
        Month = x.Key.Month,
        Sales = new Dictionary<string, double>{{x.Key.ProductName, x.Sum(z => z.sale.Value)}}
     }).ToList();


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Help with adding in LINQ to SQL query

Help with adding in LINQ to SQL query


By : ericlutley
Date : March 29 2020, 07:55 AM
will help you I was looking for Sum
subtotal = x.OrderDetails.Sum(t=> t.subTotal)
Adding a second Join with LINQ

Adding a second Join with LINQ


By : Jackelyn Marino
Date : March 29 2020, 07:55 AM
seems to work fine I have this LINQ query and I need to make a second Join to it: , It's not really clear what you mean, but I suggest you want:
code :
var linqQuery = from r in gServiceContext.CreateQuery("opportunity")
                where ...
                join c in gServiceContext.CreateQuery("contact")
                   on  ((EntityReference)r["new_contact"]).Id
                   equals c["contactid"] into opp
                from o in opp.DefaultIfEmpty()
                join r in gServiceContext.CreateQuery("annotation")
                   on c["opportunityid"]
                   equals ((EntityReference)r["objectid"]).Id
                select new...
var linqQuery = from opportunity in gServiceContext.Opportunities
                where opportunity.ChannelPartner.Id == targetChannelPartner
                   && opportunity.NewLeadStatus == 100000002
                join contact in gServiceContext.Contacts
                  on opportunity.Id equals contact.Id into contacts
                from contactOrNull in contacts.DefaultIfEmpty()
                join annotation in gServiceContext.Annotations
                  on annotation.ObjectId equals opportunity.OpportunityId
                select ...;
adding new user to sql using LINQ

adding new user to sql using LINQ


By : Parag Dhake
Date : March 29 2020, 07:55 AM
I hope this helps . There should be a second part to the error message which should tell you exactly what is wrong.
If your login screen works, then your table is UserDetails and not User and hence the error is probably says 'Cannot convert from User to UserDetail', which indicates that you should be creating an instance of UserDetails and not User, eg
code :
    UserDetails u = new UserDetails();
    u.username = TextBox1.Text;
    u.password = TextBox2.Text;

    TrackToolDataContext data = new TrackToolDataContext();
    data.UserDetails.InsertOnSubmit(u);
    data.SubmitChanges();
Adding a new object to a SQL Server database using LINQ C#/MVC does simply returns me to the same page without adding re

Adding a new object to a SQL Server database using LINQ C#/MVC does simply returns me to the same page without adding re


By : Zin Ko Oo
Date : March 29 2020, 07:55 AM
Does that help First off, thanks for everyone responding so quickly. Turns out, I had my db set to deploy on debug somehow. When I unchecked deploy on my project debug properties, everything worked.
Adding OR to my LINQ query?

Adding OR to my LINQ query?


By : Achraf Hassani
Date : March 29 2020, 07:55 AM
hop of those help? You might want to consider storing an array of values to see if any of the constraints are met :
code :
// Store all of the statuses you need to match within a collection
var validStatuses = new []{ "Pending", "Rejected", ... };
db.Updates.Where(c => !c.Sold && validStatuses.Contains(c.Status)))
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