private const string SQL_SELECT_USER = "SELECT ID,OId,Access,User_name,Img,CARDs,NAMEs From  info  WHERE ID = @Id";   
  private const string PARM_Id = "@Id";


     public ModelInfo info(int id) {

             ModelInfo info= new ModelInfo();


             SqlParameter parm = new SqlParameter(PARM_Id, SqlDbType.Int);
            parm.Value = id;


             using (SqlDataReader rdr = SqlHelper.ExecuteReader(SqlHelper.ConnectionStringLocalTransaction, CommandType.Text, SQL_SELECT_USER, parm))
             {


                    account = new ModelInfo (rdr.GetInt32(0), rdr.GetString(1), rdr.GetString(2), rdr.GetString(3), rdr.GetString(4), rdr.GetString(5),rdr.GetString(6));
              
             }

            return id;


数据字段 ID         int  
         OID        varchar(100) 可为空
         access     varchar(100) 可为空
         User_name  varchar(100) 可为空
         Img        varchar(100) 可为空
         cards      varchar(100) 可为空
         name       varchar(100) 可为空


string id="123";
ModelInfo    info= SQLServer.info(Int32.Parse(Id));

string s1 = dr.GetString(1);
string s2 = dr[1].ToString();