Search a multidimensional array object's content using linq

Question

I have the following object:

public class RandomModel : Metadata
{
    public string Name { get; set; }
    public ContentMod[][] Content { get; set; }

    public class ContentMod
    {
        public string Subtitle { get; set; }
        public string Text { get; set; }
        public string[] List { get; set; }
    }
}

I'm trying to search and return a RandomModel that contains a ContentMod that contains a string value input in any of its variables (Subtitle, Text, and/or List).

I am trying to do the equivalent of the following:

So if I want to search the string search input in the text of Name from the RandomModel and if it does contain the search string, return the RandomModel, I would do something like the following:

var randomContent = (from item in RandomContent
                     where item.Name.ToUpper().Contains(search)
                     select item).ToList();

Now I am trying to search text within all parameters of the ContentMod.

Something like the following:

var randomContent = (from item in RandomContent
                     where item.ContentMod.???.ToUpper().Contains(search)
                     select item).ToList();

I can't seem to figure out the ??? part above. How am I to use linq to iterate a multidimensional object's contents, and if they contain the string search, return the RandomModel.

Any help is much appreciated! Al

burnttoast11 · Accepted Answer · 2017-12-22 04:41:05Z

1

How about this bit of code if you don't mind using method syntax instead of query syntax.

var randomContent = models.Where(r => r.Content.Any(x =>
{
    return x.Any(y =>
    {
        return y.Text.ToUpper().Contains(search)
            || y.Subtitle.ToUpper().Contains(search)
            || y.List.Any(z => z.ToUpper().Contains(search));
    });
})).ToList();

I usually use IndexOf to do case insensitive searches, so in that case it would look like this.

var randomContent = models.Where(r => r.Content.Any(x =>
{
    return x.Any(y =>
    {
        return y.Text.IndexOf(search, StringComparison.OrdinalIgnoreCase) >= 0
        || y.Subtitle.IndexOf(search, StringComparison.OrdinalIgnoreCase) >= 0
        || y.List.Any(z => z.IndexOf(search, StringComparison.OrdinalIgnoreCase) >= 0);
    });
})).ToList();

You can adust the StringComparison as needed.

Edit: As pointed out by Backs in the comments, SelectMany can be used to give you this.

var randomContent = models.Select(r => r.Content.SelectMany(o => o.Where(x =>
{
    return x.Text.IndexOf(search, StringComparison.OrdinalIgnoreCase) >= 0
        || x.Subtitle.IndexOf(search, StringComparison.InvariantCultureIgnoreCase) >= 0
        || x.List.Any(y => y.IndexOf(search, StringComparison.InvariantCultureIgnoreCase) >= 0);
}))).ToList();

edited Dec 22, 2017 at 4:41

answered Dec 22, 2017 at 4:09

burnttoast11

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Backs Over a year ago

r.Content.SelectMany(o => o) can simplify expression

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