How to use string.Contains for list of values

Question

I have the following xmlnode (string) whose value would be of few given type i.e:

"Ansi_nulls","Encrypted","Quoted_identifer" etc.

I want to test the xmlnode using xmlNode.Contains ("xxx","yyy") ..

What is the correct syntax ?

KeithS · Accepted Answer · 2011-05-06 19:11:40Z

3

If you are testing the full (complete) value of the node, you can do it by reversing the call; check that a list of known values contains your current node value:

new[]{"Ansi_nulls","Encrypted","Quoted_identifer", ...}.Contains(xmlNode);

edited May 6, 2011 at 19:11

answered May 6, 2011 at 18:40

KeithS

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1 Comment

sehe Over a year ago

Note that this would only allow full-matches, not equivalent to the OP xmlNode.Contains ("xxx","yyy") which would substrings too

Pelto · Accepted Answer · 2011-05-06 19:00:29Z

3

I would create an extension method using sehes solution:

    public static bool Contains(this string source, params string[] values)
    {
        return values.Any(value => source.Contains(value));
    }

That way you can call:

        xmlNode.Contains("string", "something else");

edited May 6, 2011 at 19:00

answered May 6, 2011 at 18:52

Pelto

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Comments

James Kyburz · Accepted Answer · 2011-05-06 18:41:01Z

2

Contains takes a string to test for.

One way to solve your problem would be to use a simple regular expression

using System.Text.RegularExpressions;

if (Regex.IsMatch(nodevalue, "(Ansi_nulls|Encrypted|Quoted_identifer)")...

answered May 6, 2011 at 18:41

James Kyburz

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Comments

sehe · Accepted Answer · 2011-05-06 18:42:23Z

2

if (new[] {"xxx","yyy"}.Any(n => xmlNode.Contains(n)))

answered May 6, 2011 at 18:42

sehe

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Comments

nbushnell · Accepted Answer · 2011-05-06 18:45:38Z

0

A simple if statement will work:

if (xmlNode.Contains("xxx") && xmlNode.Contains("yyy"))
{
// your work
}

edited May 6, 2011 at 18:45

answered May 6, 2011 at 18:38

nbushnell

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