Is there a C# IN operator?

Question

In SQL, you can use the following syntax:

SELECT *
FROM MY_TABLE
WHERE VALUE_1 IN (1, 2, 3)

Is there an equivalent in C#? The IDE seems to

Answer 1

List.Contains() is I think what you're looking for. C# has in keyword and not an operator which serves completely different purpose then what you're referring in SQL.

There are two ways you can use in keyword in C#. Assume you have a string[] or List in C#.

        string[] names; //assume there are some names;

        //find all names that start with "a"
        var results = from str in names
                      where str.StartsWith("a")
                      select str;

        //iterate through all names in results and print
        foreach (string name in results)
        {
            Console.WriteLine(name);
        }

Referring your edit, I'd put your code this way to do what you need.

        int myValue = 1;
        List checkValues = new List { 1, 2, 3 };

        if (checkValues.Contains(myValue))
            // Do something