var age=23;var name="张";          
StringBuilder condition = new StringBuilder();            condition.Append("where 1=1");            DynamicParameters p = new DynamicParameters();            if (age>0)            {                condition.Append(" AND Age>@age");                p.Add("@age", age, System.Data.DbType.String);//对于Add方法，第一个参数可以不带@前缀，源代码里有subString(1),就给处理了            }            if (!string.IsNullOrWhiteSpace(name))//            {                condition.Append(" AND ChineseName like @name");                p.Add("@name", "%"+name+"%", System.Data.DbType.String);//对于like语句，源代码的有bug还是故意不处理? 这里必须拼接%            }            using (var conn = ConnectionFactory.GetOpenConnection())           {             var result=  conn.GetList<T>(conditions,parameters);                       }

static string Clean(string name)        {            if (!string.IsNullOrEmpty(name))            {                switch (name[0])                {                    case ‘@‘:                    case ‘:‘:                    case ‘?‘:                        return name.Substring(1);                }            }            return name;        }