Is there any easy LINQ expression to concatenate my entire List<string> collection items to a single string with a delimiter character? What if the collection is of custom objects instead of string? Imagine I need to concatenate on object.Name. 12 s 12 String.Join(delimiter, list); is sufficient.
I would assume there’s a simple LINQ query to do this, I’m just not exactly sure how. Given this piece of code: class Program { static void Main(string[] args) { List<Person> peopleList1 = new List<Person>(); peopleList1.Add(new Person() { ID = 1 }); peopleList1.Add(new Person() { ID = 2 }); peopleList1.Add(new Person() { ID = 3 … Read more
in the System.Linq namespace, we can now extend our IEnumerable’s to have the Any() and Count() extension methods. I was told recently that if i want to check that a collection contains 1 or more items inside it, I should use the .Any() extension method instead of the .Count() > 0 extension method because the … Read more
What is the prefered method for creating a byte array from an input stream? Here is my current solution with .NET 3.5. Stream s; byte[] b; using (BinaryReader br = new BinaryReader(s)) { b = br.ReadBytes((int)s.Length); } Is it still a better idea to read and write chunks of the stream? 18 s 18 It … Read more
I’m trying to perform a LINQ query on a DataTable object and bizarrely I am finding that performing such queries on DataTables is not straightforward. For example: var results = from myRow in myDataTable where results.Field(“RowNo”) == 1 select results; This is not allowed. How do I get something like this working? I’m amazed that … Read more
I am playing with LINQ to learn about it, but I can’t figure out how to use Distinct when I do not have a simple list (a simple list of integers is pretty easy to do, this is not the question). What I if want to use Distinct on a list of an Object on … Read more
