Problems encountered in fuzzy query of SQL statements

The phenomenon and background of the problem

sql Statement fuzzy query cannot find data

Problem related code , Do not paste screenshots

 StringBuilder sSelectSql =new StringBuilder( "select * from userInfo where 1=1");            List<SqlParameter> parameters = new List<SqlParameter>();            if (!string.IsNullOrEmpty(user.code))            {                // Accurately query according to the user account                 sSelectSql.Append(" AND [email protected]");                parameters.Add(new SqlParameter("@code", user.code));            }            if (!string.IsNullOrEmpty(user.name))            {                // Fuzzy query input user name                 sSelectSql.Append(" AND [email protected]");                parameters.Add(new SqlParameter("@name", "%"+user.name+ "%"));            }

Operation results and error reporting contents

Account search can be realized , But the name cannot be found

My solution ideas and tried methods

sql Is the sentence fuzzy and the query format wrong

What I want to achieve

Please help solve it