C# - Checking if strings have this [closed]

开发者_开发知识库 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 12 years ago.

how can I Check if a string contains another string?

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Why iterate when you can use LINQ? I think you're asking to get all the strings that are substrings of other strings in the array (please correct me if I'm wrong):

var result = strings.Where(s => strings.Any(s2 => s2.Contains(s)));

Update

After your update, the question seems much easier than original. If you just want to find out if a string contains another string, just use the Contains method:

var s = "Hello World!";
var subString = "Hello";

var isContained = s.Contains(subString);

Or if you want to do a case insensitive search, you have to do things a little differently:

var s = "Hello World!";
var subString = "hello";

var isContained = s.IndexOf(subString, 
    StringComparison.InvariantCultureIgnoreCase) > 0;

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You can use the method named IndexOf.

string s1 = "abcd";
string s2 = "cd";
if(s1.IndexOf(s2)>-1) {
   // if s2 is found in s1
}

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    public bool HasString(string item, List<string> arrayOfStrings)
    {
        return arrayOfStrings.Contains(item);
    }

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string lookup = "test";
bool hasString = array.Contains(lookup);

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IEnumerable<string> values = new[] { "" };
string searchTarget = "";
string firstMatch = values.FirstOrDefault(s => s.Contains(searchTarget);
if(firstMatch != null)
{
    // ...
}

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The way I'm reading it you're asking if a big string contains another, shorter string?

string bigString = "something";
string testString = "s";
bool containsTestString = bigString.IndexOf(testString) > -1;