After ExecuteScalar: Object reference not set etc

Question

What code I should add to accept null from WHERE statement.

{
    int numApprovals = 0;
    string sql = \"SELECT COUNT(Type) AS OpenforApproval \" +
                


        

Answer 1

As an aside, it's much easier/clearer to format multi-line strings as:

string sql = 
@"SELECT COUNT(Type) AS OpenforApproval
FROM dbo.LeaveRequest
WHERE Type IN (2, 3, 4, 5, 6, 8, 13, 14, 16, 22)
GROUP BY MgtApproval
HAVING MgtApproval IS NULL";