Split C# MultiSelectList into smaller ones using LINQ

Question

Hi I have a MultiSelectList that I want to split into several smaller MultiSelectList, depending on the value (NOT the selectedValues), and I want to use LINQ to achieve that...sure it is possible but I can't cut it..any suggestions? Thanks.

can we see some code and what you are referring by `value` – Baz1nga Apr 16 '12 at 06:31 — Baz1nga, Apr 16 '12 at 06:31

score 0 · Accepted Answer · answered Apr 16 '12 at 06:39

is this what you want:

var multiSelectList= new MultiSelectList(new List<string>()); //your mutli-select list
var multiSelectListGroupedByValue=ms.GroupBy(x => x.Value)
                                  .Select(x=>new MultiSelectList(x.Select(y=>y.Value)));

score 0 · Answer 2 · edited May 23 '17 at 11:49

0

Use this code (get it from here Split a collection into `n` parts with LINQ?)

static class LinqExtensions
{
 public static IEnumerable<IEnumerable<T>> Split<T>(this IEnumerable<T> list, int parts)
 {
     int i = 0;
     var splits = from item in list
                  group item by i++ % parts into part
                  select part.AsEnumerable();
     return splits;
 }
}

edited May 23 '17 at 11:49

Community

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answered Apr 16 '12 at 06:39

Likurg

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score 0 · Answer 3 · answered Apr 16 '12 at 06:43

I hope this is what you need

@{
    var array = new int[] { 1,2,3,4,5,6,7,8,9,10 };
}

@Html.ListBox("lstBoxLessThan5",new MultiSelectList(array.Where(a => a < 5).ToArray()));
<br />
@Html.ListBox("lstBoxMorethan5",new MultiSelectList(array.Where(a => a > 5).ToArray()));

Put whatever business logic inplace of temp datastructure 'array'

Split C# MultiSelectList into smaller ones using LINQ

3 Answers3