Linq select more than one column

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NettetI have to select specific column from my DataTable using linq I am using this code. ds.Table[0].AsEnumerable().Where(r=>r.Field("productID")==23).CopyToDataTable(); … Nettet10. aug. 2014 · Selecting multiple columns with linq query and lambda expression. I'm new to C# ASP.NET, and am working on my first application. I'm trying to create a linq …

how to write LINQ Query having multiple values from one Column?

Nettet14. feb. 2024 · LINQ Distinct by Field If you want to achieve the distinct values for a specific field in the list, you can use the following two methods: 1. Using GroupBy and Select functions In this approach, you need to use two LINQ functions i.e., GroupBy and Select to get the list of unique field values. Nettet5. des. 2013 · SomeThing.Select( => new {X=1,Y=2} ) anywhere in your code. It also picks up property names, in which case you don't need to specify it explicitly(the third … myselect caen

c# - How to select specific column in LINQ? - Stack Overflow

Nettet25. aug. 2024 · I've written a LINQ query shown below : List actions = resourceActions.Actions.Select(s => s.ActionName).ToList(); How do I give for … Nettet7. okt. 2024 · I want to return only specific column Like this: var test = db.myTable.Where (a => a.ID == 1).Select (a => a.Column1).Single (); one column as NewColumn=Month+"-"+Year+"-"+ReportType Please try this; var test2 = db.myTable.AsEnumerable.Select (x => new { newcolname = x.Column1 + x.Column2 … Nettet30. sep. 2013 · You can select multiple fields using linq Select as shown above in various examples this will return as an Anonymous Type. If you want to avoid this anonymous … mysejahtera vaccine overseas

Select in LINQ Query Example: LINQ Select in C# Syntax

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Nettet18. jul. 2024 · Or use a subquery to find the accounts that have more than one occurrences and then join to the table: select t.* from ( select account_id from … Nettet5. nov. 2013 · I need to find data from data table with multiple values from one column only. Below is an example: var Value = (from r in datatable.AsEnumerable () where … mysejahtera vaccination checkNettet16. jul. 2024 · But if now we want to select multiple Dept and Name fields then we can not use this since this will be invalid syntax in LINQ: var selectedLst=from item in … the spa restaurant lake hiawatha

"Nettet25. jan. 2014 · 9. var items = db.tblPosts .GroupBy (x => x.UserId) .Select (g => new { UserId = g.Key, Title = g.FirstOrDefault ().Title }) .ToList (); It will return first Title for … " - Linq select more than one column

Linq select more than one column

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Nettet15. mar. 2011 · ColumnC. I have SQL query where TABLE_1 joins on itself twice based off of ColumnA, ColumnB, ColumnC. The query might look something like this: Select … NettetI need to do a LINQ2DataSet query that does a join on more than one field (as var result = from x in entity join y in entity2 on x.field1 = y.field1 and x.field2 = y.field2 I have yet …

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Nettet7. des. 2024 · Yes, there is a way to specify exactly which columns you want. No, you can't use that method to update data. When fetching data using entity framework … Nettet15. sep. 2024 · In a LINQ query, the from clause comes first in order to introduce the data source ( customers) and the range variable ( cust ). C#. //queryAllCustomers is an …

Nettet21. sep. 2024 · Between the first from clause and the last select or group clause, it can contain one or more of these optional clauses: where, orderby, join, let and even additional from clauses. You can also use the into keyword to enable the result of a join or group clause to serve as the source for additional query clauses in the same query … Nettet7. okt. 2024 · LINQ to SQL join 3 tables and select multiple columns Archived Forums 1-20 > ADO.NET, Entity Framework, LINQ to SQL, Nhibernate Question 0 Sign in to vote User1848768891 posted hi i have three tables, Stock, InStock, OutStock tables columns: - Stock: IdStock,CodeStock, Date - InStock: Id_InStock, IdStock, mount_InStock

NettetYou can select to an anonymous type, for example. var dataset2 = (from recordset in entities.processlists where recordset.ProcessName == processname select new { … Nettetproduct.Select(m => new {m.CategoryId, m.CategoryName}).Distinct(); which logically it should create an anonymous object with CategoryId and CategoryName as properties. …

Nettet31. jul. 2011 · LINQ to Entities cannot understand this, so it has no idea that we are only using a fraction of the information it is bringing back. This brings us back to using a Select statement that LINQ to Entities is happy with. I’m going to use an anonymous type for that. The code then changes to this:

NettetThis can be done by using the GroupBy method in LINQ (Language Integrated Query) to group data from a database table based on one or more columns. The grouped data can then be used for further processing, such as aggregating the … mysejahtera user classificationNettet24. feb. 2024 · You can do this in a few different ways. One is to use Tuple: IEnumerable> r = lines.Select(l => new Tuple myselect chu caenNettet10. okt. 2009 · Simple Linq question: How to select more than one column? Ask Question Asked 13 years, 6 months ago Modified 13 years, 6 months ago Viewed 19k times 10 my code is: List users = (from a in dc.Benutzer select a).ToList (); … myselect e240