Re: Clean way to do string.join

Try this...

        string [] stuff = { "X", "", "Z", "" };
        StringBuilder result = new StringBuilder( 50 );
        
        for( int i = 0; i < stuff.Length; i++ )
        {
            result.Append( ( result.Length > 0 && stuff[i].Length > 0
? " AND " : "" ) + stuff[i] );
        }

The result of the above was: X AND Z

To answer your question, I think String.Join is behaving exactly as I
would expect. It might be nice if it had an overload that allowed you
to tell it to ignore zero-length strings, but I wouldn't expect the
default behavior to do anything other than what it is doing.

On Tue, 25 Jan 2005 18:07:54 -0800, Zhong, Clark Y
<clark.y.zhong@xxxxxxxxx> wrote:
> 
> Hi all:
> 
>             I like to use a lot string functions since formulating an
> expression can be a pain.   I tried to use string.join to make a simple
> AND clause, "X AND Y AND Z", any of them can be empty, i.e., if X is
> empty, it becomes "Y AND Z".   However I noticed string.join is not that
> smart, it does not treat empty string or null string differently, and
> output " AND Y AND Z".
> 
>             I hate to do an elaborate if else since I need to do
> multiple branches for different combinations.  Any efficient way to
> address string.join's short coming?  Shouldn't it no do a join if string
> element is empty?