SQL DataReader how to show null-values from query

Posted by cc0 on Stack Overflow See other posts from Stack Overflow or by cc0
Published on 2010-05-05T12:34:07Z Indexed on 2010/05/05 12:38 UTC
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Filed under:

sql

|

datareader

|

stringbuilder

|

c#

I have a DataReader and a StringBuilder (C#.NET) used in the following way;

                while (reader.Read())
                {
                    sb.AppendFormat("{0},{1},{2},",reader["Col1"], reader["Col2"], reader["Col3"]);
                }

Which works great for my use, but when a row is null I need it to return "null", instead of just "". What would be a good way of accomplishing that?

Suggestions are very appreciated

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