荣耀彩票代理

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vb和vb.net数据访问上大不同

作者:wy  发布日期:2019-01-12 08:40:00
  •   很多人在刚刚踏入编程这个圈子的时候,很难分清楚vb和vb.net。那么它们两个之间有何不同之处呢?在数据访问下它们的不同之处又表现为其他什么方面呢?接下来请带着你的疑问认真观看这篇文章吧,希望你能有所收获,帮助你理解清楚。

      虽然说VB.NET是VB 6.0的后继版本,但在我看来VB.NET除了在语法上还保留VB6.0原有的踪影以外,因为二者几乎在90%以上保持相似或相同。但在其他很多方 面,VB.NET都和VB6.0截然不同。也许正是这些不同点,才使得VB.NET功能更强大,更有生命力,但同样也为VB6.0程序员转型为 VB.NET程序员带来了困难。因为VB.NET提出了很多新的功能、概念和观点,掌握VB.NET不仅要掌握语法,还需要理解并运用这些新的功能、概念 和观点。当然也需要掌握.Net框架,理解CLR(CommonLanguage Runtime,通用语言进行时)。

      BUTONGDIANZHUYAOBIAOXIANZAI:SHUJUFANGWENJISHU、SHUJUFANGWENJUTISHIXIANFANGFAHESHUJUBANGDINGSHANGDEBUTONG。

    数据区别

    荣耀彩票代理  ZAISHUJUFANGWENJISHUSHANG,VB 6.0SHI TONGGUOADO(Active X Data Object,JI:Active XSHUJUDUIXIANG)LAISHIXIANDUISHUJUKUFANGWENDE。TONGSHIWEILEBAOZHENGDUIZAOQIBANBENDEJIANRONG,YETIGONGRDO(YUANCHENGSHUJUDUIXIANG)HEDAO(SHUJUFANGWENDUIXIANG)ERZHONGSHUJUFANGWENJISHU。ZAI VB.NETZHONGSHISHIYONGADO.NETLAIFANGWENSHUJUKU,ADO.NETSHI.NETKUANGJIADEYIBUFEN,QIDUIYINGDELEIKUSHI.Net FrameWork SDKDEZHENZIJI。ADOHEADO.NETZHEILIANGZHONGJISHUZAIGAINIAN、GONGNENGHESHIXIANSHANGDOUYOUXUDUOCHAYI。YOUYUPIANFUSUOXIAN,ZHEILIJIUBUYIYIJIESHAOLE。QISHIZAIVB.NETZHONGYEKEYISHI YONGADOLAIFANGWENSHUJUKU,DANADOZAIVB.NETZHONGSHIYICOMZUJIANDEXINGSHICHUXIANDE,TONGGUOTIANJIAYINYONGCAIKEYIZAIVB.NETZHONGSHIYONG。TIANJIAYINYONGDEGUOCHENG,QISHIJIUSHIDUI COMZUJIANHUCAOZUO。JINGGUOHUCAOZUOHOUDECOMZUJIAN,YIJINGBINGFEIXIANQIANYIYISHANGDECOMZUJIAN,ERSHIZHUANBIANCHENGKEGONGVB.NETZHIJIESHIYONGDE.NetLEIKU。

    荣耀彩票代理  ZAISHUJUFANGWENDEJUTISHIXIANFANGFASHANG,VB 6.0SHI XIANSHUJUFANGWENZHUYAOSHILIANGZHONGFANGFA:QIYISHIZAICHENGXUSHEJIJIEDUAN,KETONGGUOBASHUJUYUANBANGDINGDAOADODCKONGJIANHUOSHIYONGSHUJUHUANJING;QIERZAIYUNXINGSHI,KEYITONGGUOBIANCHENGFANGSHICHUANGJIANJILUJI RecordSetDUIXIANGBINGYUJILUJIDUIXIANGJIAOHUANSHUJU。TONGYANGZAIVB.NETZHONGSHIXIANSHUJUFANGWENDEFANGFAZHUYAOYESHIERZHONG:QIYISHIZAICHENGXUSHEJIJIEDUAN,TONGGUOCHUANGJIAN、PEIZHISHUJUSHIPEIQI DataAdapterHESHENGCHENGSHUJUJIDataSet;QIERZAIYUNXINGZHONG,TONGGUOBIANCHENGFANGSHIDONGTAICHUANGJIAN、PEIZHISHUJUSHIPEIQIHECHUANGJIAN、SHENGCHENGSHUJUJI。

      ZAISHUJUBANGDING(Data Bind) SHANG,ZAIVB 6.0ZHONGSHIXIANSHUJUBANGDINGTONGGUOSHEZHIKONGJIANDEXIALIESHUXINGLAISHIXIAN:DataChanged、DataField、DataFormat、DataMember HE DataSource。TONGCHANGSHIBAKONGJIANDEXIANSHISHUXINGBANGDINGDAOSHUJUYUANZHONGDEXIANGYINGZIDUAN。ZAIVB.NETZHONG,SHUJUBANGDINGDEYINGYONGFANWEIKEGUANGFANDEDUO,VB.NETZHONGKEYIJIANGRENHEKONG JIANDERENHESHUXINGBANGDINGDAOBAOHANSHUJUDERENHEJIEGOUZHONG。

    荣耀彩票代理  XIANGXINDAJIAZAIKANWANZHEIPIANWENZHANGYIHOUDUIvbHEvb.netYOULEGENGSHENDELEJIE,NIKANDONGLEvbHEvb.netDEQUBIEMA?RUGUONIHAISHIMEIYOUKANDONG,KEYISHOUZANGWOMENDEWANGZHAN,GENGDUOZIXUNXIANGQINGQINGGUANKANQITANEIRONG,GANXIENIDEZHICHIHEHEZUO。

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