combine stringcollection content and webform content in same INSERT INTO

Question

Some background:
i am converting an asp application into asp.net. when a team gets nominated they would like to select the whole team (upto 10 members) and enter the nomination details once. at the moment they would have to enter it upto 10 times!! so i have to combine the normal web input with the multi-select or radio buttons. i am getting very frusrated since there is not alot of info on this subject around.
your assistance would be appreciated!!
here is my code so far:
 
string sqlStatement = string.Empty;
sqlStatement = "INSERT INTO Table_1 (people) VALUES";
sb.AppendFormat("{0}('{1}'); ", sqlStatement, item);
sqlStatement = "INSERT INTO Table_1 (UserId) VALUES (@Userid)";
sb.Append(sqlStatement + " ;");
 
This now produces two records per person:

Joe Bloggs	NULL
NULL	12235

 
i need to combine this information:

Joe Bloggs

12235

 
 
Thank you so much!!