How do I use LINQ Contains(string[]) instead of Contains(string)

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I got one big question.

I got a linq query to put it simply looks like this:

from xx in table
where xx.uid.ToString().Contains(string[])
select xx

The values of the string[] array would be numbers like (1,45,20,10,etc...)

the Default for .Contains is .Contains(string).

I need it to do this instead: .Contains(string[])...

EDIT : One user suggested writing an extension class for string[]. I would like to learn how, but any one willing to point me in the right direction?

EDIT : The uid would also be a number. That's why it is converted to a string.

Help anyone?

c# linq string contains

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1 Answer

So am I assuming correctly that uid is a Unique Identifier (Guid)? Is this just an example of a possible scenario or are you really trying to find a guid that matches an array of strings?

If this is true you may want to really rethink this whole approach, this seems like a really bad idea. You should probably be trying to match a Guid to a Guid

Guid id = new Guid(uid);
var query = from xx in table
            where xx.uid == id
            select xx;

I honestly can't imagine a scenario where matching a string array using "contains" to the contents of a Guid would be a good idea. For one thing, Contains() will not guarantee the order of numbers in the Guid so you could potentially match multiple items. Not to mention comparing guids this way would be way slower than just doing it directly.

answered 2008-10-12T16:38:52.007

How do I use LINQ Contains(string[]) instead of Contains(string)

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