C#获取字段

/// <summary>
  /// 获得数据列表
  /// </summary>
 public DataTable GetList(string strWhere)
  {
   StringBuilder strSql=new StringBuilder();
   strSql.Append("select * FROM A");
   if(strWhere.Trim()!="")
   {
    strSql.Append(" where "+strWhere);
   }
   return DbHelperSQL.Query(strSql.ToString()).Tables[0];
  }

 

　　 DataTable dt = imgBll.GetList("");
        DataRow[] dr = dt.Select();
        foreach (DataRow r in dr)
        {
            string id = r.ItemArray[0].ToString();
        }