How do I use an IEnumerable string parameter in my code?

Question

As part of my search page I am allowing the user to make a multi-select on specific search terms using the KendoUI Multiselect widget. These items in the collection are passed to my controller as a parameter. My question is, after I have passed them to my controller how do I use them? more specifically how do I use them in my Where statement which uses the Contains method.

Here is my code for the multi select widget

@(Html.Kendo().MultiSelect() .Name("vessel_type") .Placeholder("Select Type") .BindTo(new List<string>() { "AHTS", "PSV", "Special" }))

Here is my controller code which uses the vessel_type as a parameter

public ActionResult Search(IEnumerable<string> vessel_type) { var vessels = (from o in db.vessels select o); vessels = vessels.Where(s => s.vessel_type.Contains(vessel_type)); return PartialView("_results", vessels); }

This line isn't correct because it's expecting a string but I have a collection of mroe than one:

 vessels = vessels.Where(s => s.vessel_type.Contains(vessel_type));

Thanks

What is the type of s.vessel_type?

StriplingWarrior
– StriplingWarrior

2016-08-04 14:40:24 +00:00
Commented Aug 4, 2016 at 14:40 — StriplingWarrior
– StriplingWarrior, Commented Aug 4, 2016 at 14:40

Kapol · Accepted Answer · 2016-08-04 14:40:52Z

If I understand the question correctly, I believe you need to perform the check the other way around, that is check if the vessel_type collection contains the vessel's type:

vessels = vessels.Where(s => vessel_type.Contains(s.vessel_type));

Here Contains is an extension method on IEnumerable<T>.

On a side note, since the parameter represents a collection, I think a plural name is more appropriate, for example vessel_types.

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