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<h1 class="article_title">娣卞叆鐞嗚ВDataAdapter</h1>
<div class="article_author">娣誨姞鏃墮棿錛?016-12-20 17:50:52 鏂囩珷浣滆�咃細<a href="/">嫻庡崡杞歡寮�鍙?/a> 嫻忚嬈℃暟錛?Script Language="Javascript" Src="/item/GetHits.asp?Action=Count&GetFlag=0&m=1&ID=3100"></Script></div>
<div class="article_main"><div id="MyContent"><p><strong style="margin: 0px; padding: 0px;">鎽樿</strong></p><p> ADO.NET鏈変袱涓牳蹇冪粍浠訛細鍩轟簬榪炴帴鐨凞ata Provider緇勪歡浠ュ強鍩轟簬闈炶繛鎺ョ殑DataSet緇勪歡銆傚熀浜庤繛鎺ョ殑Data Provider緇勪歡甯哥敤浜庡疄鏃跺湴浠庢暟鎹簱涓绱㈡暟鎹�傝�屽熀浜庨潪榪炴帴鐨凞ataSet錛屼技涔庝笌鏁版嵁搴撴病鏈夌洿鎺ヨ仈緋伙紝浠呬粎鐢ㄤ簬鍦ㄦ湰鍦板唴瀛樹腑瀛樺偍Data Provider鎻愪緵鐨勬暟鎹〃鎴栭泦鍚堛�傝繖涓�鍒囦技涔庡緢寰錛屾鏃訛紝浣犳槸鍚﹀湪鎯籌細榪欎袱澶х粍浠舵槸濡備綍鑱旂郴鍦ㄤ竴璧風殑鍛紵鎴栬錛岄�氳繃闃呰鏈枃浼氭垨澶氭垨灝戣В闄や綘鐨勪竴浜涚枒鎯戝憿錛?/p><p><strong style="margin: 0px; padding: 0px;">1. 璁よ瘑DataAdapter</strong></p><p> 鍓嶉潰鎴戞墍璁茬殑瀵硅薄涓紝璀Connection瀵硅薄錛孋ommand瀵硅薄浠ュ強DataReader瀵硅薄錛岃繖浜涘璞″潎灞炰簬Data Provider鐨勪竴閮ㄥ垎錛岃�屼笖閮芥槸鍩轟簬榪炴帴鐨勩�傛嫢鏈夊己澶у姛鑳界殑瀹冧滑錛岃浣犲彲浠ュ緢杞繪澗鍦拌繛鎺ヤ竴涓壒瀹氱殑鏁版嵁婧愶紝鎵цSQL璇彞錛屾绱㈠彧璇葷殑鏁版嵁嫻佺瓑絳夈�傝繖浜涘熀浜庤繛鎺ョ殑瀵硅薄閮藉搴斾簬鐗瑰畾鐨勬暟鎹簮銆傛崲鍙ヨ瘽璇達紝瀵逛簬涓嶅悓鐨勬暟鎹簮錛屾垜浠渶瑕佹壘鍒板搴旂殑鏁版嵁搴撴彁渚涚▼搴忥紙Data Provider錛夋潵鍖歸厤浠栦滑銆傚綋鐒訛紝浣犱篃涓嶅繀涓烘鎰熷埌鍥版儜鍜岀揣寮狅紝鍦ㄥ墠闈㈡垜宸茬粡璁插緱寰堣緇嗕簡銆傛垨璁革紝浠ョ洰鍓嶆垜浠墍瀛︾殑鐭ヨ瘑錛屽浜庢搷浣滄暟鎹簮浠ュ強媯�绱㈡暟鎹畬鍏ㄦ病鏈変粈涔堥棶棰樺憿錛佷絾鏄紝榪欏茍娌℃湁鍙戞尌鍑篈DO.NET鐨勪紭鍔褲�傚鏋滐紝姣忔鎴戜滑媯�绱㈡暟鎹簱涓殑琛ㄦ垨鑰呰閮介渶瑕佽繛鎺ヤ竴嬈℃暟鎹簱錛岄偅涔堟�ц兘鍜屾晥鐜囨槸鍗佸垎浣庝笅鐨勩�傚疄闄呬笂錛孉DO.NET鎻愪緵浜嗗熀浜庨潪榪炴帴鐨勬牳蹇冪粍浠訛細DataSet銆侱ataSet緇勪歡璁╂垜浠彲浠ュ緢鎰夊揩鍦板湪鍐呭瓨涓搷浣滀互琛ㄤ負涓績鐨勬暟鎹泦鍚堬紝灝卞ソ姣旀搷浣滄暟鎹簱涓殑琛ㄤ竴鏍楓�傝繖鏄涔堣浜哄叴濂嬪拰嬋�鍔ㄥ晩錛?/p><p> 涓嶇煡閬撳ぇ瀹舵湁娌℃湁鎯寵繃榪欐牱涓�涓棶棰橈紙鍙嶆鎴戞槸鎯充簡錛夛細鏃㈢劧DataSet鏄熀浜庨潪榪炴帴鐨勶紙涓嶉渶瑕佽繛鎺ユ暟鎹簱錛夛紝閭ｄ箞瀹冨瓨鍌ㄧ殑鏁版嵁闆嗗悎鏄粠鍝噷鏉ュ憿錛熷疄闄呬笂錛屽緢澶氭椂鍊欙紝瀹冪殑鏁版嵁榪樻槸鏉ヨ嚜浜庢暟鎹簱銆侽h!榪欎技涔庢湁鐐硅嚜鐩哥煕鐩句簡錛佹墦涓�滀笉闆呪�濈殑姣斿柣錛氬氨濂芥瘮娌℃湁楦★紝閭ｅ摢鏉ョ殑铔嬪憿錛熶綘涓嶅Θ鎹釜瑙掑害鏉ユ�濊�冮棶棰橈紒铏界劧錛屼綘娌℃湁鍏婚浮錛屼絾鏄紝浣犱笉鏄繕鍙互浠庤秴甯傛垨鑰呭叾浠栭浂鍞簵涔板埌楦¤泲鍚楋紵鍚岀悊錛屽敖綆ataSet娌℃湁鐩存帴榪炴帴鏁版嵁搴擄紝浣嗘槸錛孉DO.NET鏃╁氨涓篋ataSet鍑嗗浜嗕竴浣嶉潪甯歌唉铏氬弸鍠勭殑涓粙錛欴ataApdater銆侱ataApater鏁版嵁閫傞厤鍣紝灝辨槸榪欐牱涓�涓璞★細瀹冧負澶栭儴鏁版嵁婧愪笌鏈湴DataSet闆嗗悎鏋惰搗浜嗕竴搴у潥瀹炵殑妗ユ錛屽皢浠庡閮ㄦ暟鎹簮媯�绱㈠埌鐨勬暟鎹悎鐞嗘紜殑璋冮厤鍒版湰鍦扮殑DataSet闆嗗悎涓�?/p><p><strong style="margin: 0px; padding: 0px;">2. DataAdapter鐨勫伐浣滃師鐞?/strong></p><p> 瑕佽DataAdapter鏄疉DO.NET涓栫晫閲屾渶涓哄鏉傜殑閮ㄥ垎錛屽叾瀹炰篃涓嶄負榪囷紒浣嗘槸錛屾垜浠篃涓嶅繀鎯婃厡銆傚敖綆ataAdater鍐呴儴瀹炵幇鏈哄埗杈冧負澶嶆潅錛屼絾鏄彁渚涘紑鍙戜漢鍛樼殑鎺ュ彛鍗存槸寮傚父鐨勭畝鍗曘�傛垜浠煡閬擄紝DataApapter鏈川涓婂氨鏄竴涓暟鎹皟閰嶅櫒銆傚綋鎴戜滑闇�瑕佹煡璇㈡暟鎹椂錛屽畠浠庢暟鎹簱媯�绱㈡暟鎹紝騫跺～鍏呰鏈湴鐨凞ataSet鎴栬�匘ataTable涓紱褰撴垜闇�瑕佹洿鏂版暟鎹簱鏃訛紝瀹冨皢鏈湴鍐呭瓨鐨勬暟鎹礬鐢卞埌鏁版嵁搴擄紝騫舵墽琛屾洿鏂板懡浠ゃ�備笅闈㈡垜浠互Customer琛ㄤ負渚嬶紝鏉ョ悊瑙ataAdapter鐨勫伐浣滃師鐞嗐�?/p><p> 鎴戜滑鍙互鐭ラ亾錛屽綋鎴戞煡璇ustomer淇℃伅錛孌ataAdapter棣栧厛灝嗘瀯閫犱竴涓猄electCommand瀹炰緥錛堟湰璐ㄥ氨涓�涓狢ommand瀵硅薄錛夛紝鐒跺悗媯�鏌ユ槸鍚︽墦寮�榪炴帴錛屽鏋滄病鏈夋墦寮�榪炴帴鍒欐墦寮�榪炴帴錛岀揣鎺ョ潃璋冪敤DataReader鎺ュ彛媯�绱㈡暟鎹紝鏈�鍚庢牴鎹淮鎶ょ殑鏄犲皠鍏崇郴錛屽皢媯�绱㈠埌寰楁暟鎹簱濉厖鍒版湰鍦扮殑DataSet鎴栬�匘ataTable涓�傚悓鐞嗭紝鎴戜滑闇�瑕佹洿鏂版暟鎹簮鏃訛紝DataAdatper鍒欏皢鏈湴淇敼鐨勬暟鎹紝璺熸嵁鏄犲皠鍏崇郴錛屾瀯閫營nsertCommand錛孶pdateCommnad錛孌eleteCommand瀵硅薄錛岀劧鍚庢墽琛岀浉搴旂殑鍛戒護銆?/p><p> 涔嬫墍浠ヨ錛孌ataAdapter鏄渶澶嶆潅鐨凙DO.NET緇勪歡錛屾槸鍥犱負瀹冩槸鏋舵瀯鍦ㄦ墍鏈夊叾浠朌ataProvider瀵硅薄涔嬩笂鐨勩�侰onnection瀵硅薄錛孌ataReader瀵硅薄錛孭aramter瀵硅薄浠ュ強Command瀵硅薄錛岄兘灝藉彲鑳界殑涓哄畠鏈嶅姟銆傛�諱綋鏉ヨ錛孌ataAdapter涓昏鏈変笁澶у姛鑳斤細</p><p>鏁版嵁媯�绱細灝藉彲鑳界敤鏈�綆�鍗曠殑鏂規硶濉厖鏁版嵁婧愬埌鏈湴DataSet鎴栬�匘ataTable涓�傜粏鑷寸殑璇達紝DataAdapter鐢ㄤ竴涓狣ataReader瀹炰緥鏉ユ绱㈡暟鎹紝鍥犳浣犲繀欏繪彁渚涗竴涓猄elect鏌ヨ璇彞浠ュ強涓�涓繛鎺ュ瓧絎︿覆銆?/p><p>鏁版嵁鏇存柊錛氬皢鏈湴淇敼鐨勬暟鎹繑鍥炵粰澶栭儴鐨勬暟鎹簮鐩稿鏉ヨ紼嶅井澶嶆潅涓�鐐廣�傚嵆浣匡紝浠庢暟鎹簱鏌ヨ鏁版嵁鏃訛紝鎴戜滑浠呬粎鍙渶瑕佷竴鏉″熀鏈殑Select璇彞錛岃�屾洿鏂版暟鎹簱鍒欓渶瑕佸尯鍒咺nsert,Update,Delete璇彞銆?/p><p>琛ㄦ垨鍒楀悕鏄犲皠錛氱淮鎶ゆ湰鍦癉ataSet琛ㄥ悕鍜屽垪鍚嶄笌澶栭儴鏁版嵁婧愯〃鍚嶄笌鍒楀悕鐨勬槧灝勫叧緋匯�?/p><p><strong style="margin: 0px; padding: 0px;">3. 璇磋DataAdapter鐨勯噸瑕佹垚鍛?/strong></p><p> 浣滀負.NET DataProvider瀵硅薄鎴愬憳涔嬩竴錛孌ataAdapter璺熷叾浠栨暟鎹彁渚涘璞″叿鏈夌浉浼肩殑鐗瑰緛錛氶兘鏄熀浜庤繛鎺ョ殑錛岄兘緇ф壙浜庡熀綾伙紝涓嶅悓鐨勬暟鎹簮閮藉搴旇嚜宸辯殑媧劇敓鐗堟湰銆傝繖鏍風悊瑙ｇ殑璇濓紝瀛︿範DataAdapter浼間箮綆�鍗曠殑澶氥�侱ataAdapter鐨勫熀綾繪槸DBDataAdapter錛屽畠鐨勭粨鏋勫涓嬶細</p><p>public abstract class DbDataAdapter : DataAdapter, </p><p> IDbDataAdapter, IDataAdapter, ICloneable</p><p> 浠庝笂闈㈡垜浠彲浠ョ湅鍒幫紝DBDataAdapter鏄竴涓娊璞″熀綾伙紝涓嶈兘琚疄渚嬪寲錛屽茍涓旂戶鎵緿ataAdapter綾伙紝IDBDataApdater,IdataAdapter浠ュ強Icloneable鎺ュ彛銆侱ataAdapter鎴愬憳杈冨錛屽繀欏繪帉鎻＄殑鏈変互涓嬪嚑縐嶏細</p><p> </p><p>SelectComand灞炴�э細鑾峰彇鎴栬緗敤浜庡湪鏁版嵁婧愰�夋嫨璁板綍鐨勫懡浠ゃ�?/p><p>UpdateCommand灞炴�э細鑾峰彇鎴栬繖鍙敤浜庢洿鏂版暟鎹簮涓殑璁板綍鐨勫懡浠ゃ�?/p><p>DeleteCommand灞炴�э細鑾峰彇鎴栬緗敤浜庝粠鏁版嵁婧愪腑鍒犻櫎璁板綍鐨勫懡浠ゃ�?/p><p>InsertCommand灞炴�э細鑾峰彇鎴栬緗敤浜庡皢鏂拌褰曟彃鍏ユ暟鎹簮涓殑鍛戒護銆?/p><p>Fill鏂規硶錛氬～鍏呮暟鎹泦銆?/p><p>Update鏂規硶錛氭洿鏂版暟鎹簮銆?/p><p><strong style="margin: 0px; padding: 0px;">4. 鎬葷粨</strong></p><p> 鏈枃鎴戜富瑕佷粠"WHY"涓?quot;WHAT"鐨勮搴﹁緇嗚瑙ｄ簡DataAdapter鐨勫伐浣滃師鐞嗕互鍙婁富瑕佷綔鐢ㄣ�傚鏋滄枃绔犲鍥弸浠湁甯姪錛屽笇鏈涜兘寰楀埌鎮ㄧ殑鎺ㄨ崘鍜屽叧娉ㄣ�傛偍鐨勮偗瀹氬拰鏀寔鏄垜緇х畫鍐欎綔鐨勬渶澶у姩鍔涳紒<br style="margin: 0px; padding: 0px;"/></p><p><br/></p></div>
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