Creating a select list from an array

Question

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how to find the index particular items in the list using linq?

I am trying to create a IEnumerable<SelectListItem> from an array of strings.

string[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };

model.month = months
        .Select(r => new SelectListItem{Text = r, Value = ???});

Is there a way to access their index within this query?

http://msdn.microsoft.com/en-us/library/bb534869.aspx – Ilia G Jan 02 '13 at 21:36 — Ilia G, Jan 02 '13 at 21:36

Sergey Berezovskiy · Accepted Answer · 2013-01-02T21:44:47.127

13

Use overloaded Enumerable.Select method:

model.month = months
    .Select((r,index) => new SelectListItem{Text = r, Value = index.ToString()});

edited Jan 02 '13 at 21:44

answered Jan 02 '13 at 21:36

Sergey Berezovskiy

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1

Thank you for the reference. As a note, `Value` must be of type string so `Value = index.ToString()` would be correct – Jeff Jan 02 '13 at 21:43

Soner Gönül · Answer 2 · 2013-01-02T21:59:44.813

5

Try with Enumerable.Select.

Projects each element of a sequence into a new form by incorporating the element's index.

model.month = months
        .Select((r, i) => new SelectListItem{Text = r, Value = i.ToString()});

edited Jan 02 '13 at 21:59

answered Jan 02 '13 at 21:38

Soner Gönül

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score 2 · Answer 3 · answered Jan 02 '13 at 21:43

Jeff this should work for you based on the example on the link that lila G posted

string[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
var query = months.Select((r, index) => new  { Text = r, Value = index });

Screen shot of what it looks like in the Debugger

enter image description here

Creating a select list from an array

3 Answers3