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Questions tagged [addrange]

83 questions
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Using linq to append list to list from select method

I have a collection A of let's say 100 items. From that list I want to perform a where clause which can rule out let's say 20 of items. Is there a way to use Select clause or something else on items in which I could use external method that returns…
Goran Sneperger
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AddRange from `await` directly

I am currently returning a list of lists (List>) from await getWorlds() and right now I am looping through each one of them, and getting the first entry in each list. I just wonder if there is another way I can quickly add all of them…
Lee Cheung
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Why i have error result by use IList().toList().AddRange()?

Those are my old Code that cannot response correct result. IList testList=new List(); testList.Add("string1"); var testList2=new List(testList); testList.ToList().AddRange(testList2); I expect there are two elements in…
Moises .Li
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.Net EF AddRange On List of Objects is Showing as Multiple Queries

It is my understanding that to easily add a list of objects to the database you can add them to a list and then simply call the AddRange followed by the SaveChanges to get this accomplished in one query. We are using a profiler however and seeing it…
DB at PS
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AddRange doesn't improve time performance when adding items to ListView

I have a list of items. I parse through this list and based on a condition, parse elements from this list and save them in 2 separate lists - listOne and listTwo (of type - ListViewItem). Later, I call AddRange on both of these lists to add them in…
user2769790
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Joining 2 lists with condition

I want to join 2 lists. Students and Persons. Both Student and Person has id and a name variable, plus Student has another variable called isStudying. I want to join all Students to Person with the isStudying variable. var persons = new Person {…
kent
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No output from addrange directories query

I'm having some trouble generating an output in my last for loop. I'm suposed to be generating a list of folders that fit the criteria in the double for loop but black screen is just stuck doesnt even display the press any key to exit messsage. Help…
JPhillips
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How to use LINQ replace a range of nested values in a list?

I'm probably not wording the question correctly, so please help me on the nomenclature. If I have a List which has a constant set of x values, but a variable stream of y values. Right now I have: List points = new…
UndeadBob
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Entity Framework c#: Bug when AddRange in loop

I have 2 millions of "pb" object instances. I want to add it to my database. Because of memory i splitted list of my objects into a collections of lists and in "for" loop I am trying to add 10'000 of my object instances to database per…
painacle
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Qt vs C# - List and Vector

I want to ask the following question: Q: What is the difference between AddRange() in C# and Append() in Qt? I read the description for both and in my opinion they are almost identical in there functionality.
Mike
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How to save and restore anchorNode/anchorOffset & focusNode/focusOffset?

In the following code: var s=window.getSelection(); var sr=s.getRangeAt(0); console.log(s.anchorOffset+" "+s.focusOffset); s.removeAllRanges(); s.addRange(sr); console.log(s.anchorOffset+" "+s.focusOffset); The anchorOffset and focusOffset are…
poby
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Add from one list to another

I have been trying to 'transport' the first two elements from list A to list B without copying them. At the start, list A has four int values. In the end I want List A and B to both have 2 int values. I'm trying something like this: int a = 1; int b…
Turbosheep
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List<>.AddRange - where clause

Hi I am working on application to get some details from Sharepoint lists. I am able to get the results as shown below: sample.AddRange(queryResults.GetItemRows().Select(listItemRow => new CalendarEvents { ItemId =…
jats
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Add one column of 2D array to listbox using AddRange

I have one 2D array: string[,] table = new string[100,2]; and I want to add the table[,0] to a listbox, something like that listbox1.Items.AddRange(table[,0]); What is the trick to do that? Edit: I want to know if it possible to do that using…
a1204773
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LINQ - Joining Lists in a linq Query

Question is How do a return a List of B with all the entities in children of all Parents without resorting to the type of code below, I was thinking u must be able to acheive the same within a single linq query? Class Parent { public Title, …
Dan
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