Convert an array of integers for use in a SQL “IN” clause

Question

Surely there is a framework method that given an array of integers, strings etc converts them into a list that can be used in a SQL \"IN\" clause?

e.g.

Answer 1

Hey, great suggestions, just a slight modification below

public static class IEnumerableExtensions
{
    // reasonable to assume you will use this everywhere, not just
    // Sql statements, but log statements, anywhere you need to 
    // dump a list into a readable format!
    // 
    // HINT: extra credit: you can generalize this, and provide
    // specialized short hands that invoke the general method
    public static string ToCommaSeparatedString(this IEnumerable values)
    {
         // SIGH: so apparently this does not generate minimal
         // assembler on every machine, please note the following
         // is written for clarity, please feel free to substitute
         // your own favourite ultra-performance high-octance
         // string appender algorithm
         StringBuilder commaSeparated = new StringBuilder ();
         foreach (T value in values)
         {
             // PERF: store format string as const
             commaSeparated.AppendFormat ("{0}, ", value);
         }
         // PERF: store trim chars as static readonly array
         return commaSeparated.Trim (", ".ToCharArray ());
    }
}

...
// elsewhere in code
List myIdentifiers = new List { 1, 2, 3, 4, 5, };
string mySqlIdentifierList = myIdentifiers.ToCommaSeparatedList ();
string mySqlStatementFormat = "SELECT * FROM [SomeTable] WHERE [Id] IN ({0})";
string mySqlStatement = 
    string.format (mySqlStatementFormat, mySqlIdentifierList);
...