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How to add List<> to a List<> in asp.net

Asked 2010-03-03T08:21:53.283
206

Is there a short way to add List<> to List<> instead of looping in result and add new result one by one?

var list = GetViolations(VehicleID);
var list2 = GetViolations(VehicleID2);

list.Add(list2);
c# asp.net list
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2 Answers

408

Use List.AddRange(collection As IEnumerable(Of T)) method.

It allows you to append at the end of your list another collection/list.

Example:

List<string> initialList = new List<string>();
// Put whatever you want in the initial list
List<string> listToAdd = new List<string>();
// Put whatever you want in the second list
initialList.AddRange(listToAdd);
answered 2010-03-03T08:28:34.460
17

  1. Use Concat or Union extension methods. You have to make sure that you have this declaration using System.Linq; in order to use LINQ extensions methods.

  2. Use the AddRange method.

answered 2010-03-03T08:24:46.483

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