计算机科学与技术：VB.NET应用教程 978-7-302-09622-1 Advanced VB.NET Chapter 15

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1、Chapter15ActiveServerPages.NETandActiveXDataObjects.NETObjectivesUnderstandspecificIntrinsicclassesinASP.NET–RequestandResponseUnderstandhowstateismaintainedinWebPagesUnderstandtheintrinsicclass,SessionUnderstandhowADO.NETisusedinconjunctionwithASP.NETLab15.1The

2、firstASP.NET/ADO.NETapplicationLab15.2TheExamApplicationwithDynamicWebFormControlsUnderstandthePlaceHoldercontrolthatisuniquetoWebFormsUnderstandhowWebFormcontrolscanbecreateddynamicallySuggestedHomeAssignments2Copyright2004PearsonEducation,Inc.HTTPRequestClassH

3、TTPRequestclassinstanceisexposedastheRequestpropertyofthePageclassTheinformationinanHTTPrequestcanbeaccessedthroughtheproperties,collections,andmethodsoftheHTTPRequestclassEx:TheFormcollectioncontainsthevaluesofallformcontrolsinName/Valuepairs3Copyright2004Pear

4、sonEducation,Inc.HTTPRequestClassProperty/Collection/MethodDescriptionAcceptTypespropertyReturnsaStringarraycontainingtheMIMEtypesBrowserpropertyReturnsaninstanceoftheHttpBrowserCapabilitiesclassthathelpstodeterminethecharacteristicsoftheclientbrowsersuchaswheth

5、erthebrowsersupportsbackgroundsounds,supportscookies,andFramesamongothersInputStreampropertyReturnsaStreamobjectcontainingthebodyoftheHTTPrequestIsSecureConnectionpropertyReturnsaBooleanindicatingwhetherthecurrentconnectionusessecuresocketlayers(SSL)ornotUserHos

6、tAddresspropertyReturnstheIPaddressoftheclientCookiescollectionReturnsaninstanceoftheHttpCookieCollectionclassthatcontainsallthecookiespresentintheclientrequestFormcollectionReturnsaninstanceoftheNameValueCollectionclassthatcontainsallformcontrolvalues(providedt

7、hemethodattributeoftheHTMLFormissettoPOST)ParamscollectionThiscollectionalsoreturnsaninstanceoftheNameValueCollectionclassthatcontainsname/valuepairsfortheCookies,Form,QueryString,andtheServerVariablescollectionSaveAsmethodThismethodisdesignedtosavetheHTTPreques

8、ttodisk.Acceptstwoarguments–filenameandasecondBooleanargumenttoindicatewhethertosavetheHTTPheaderinformationaspartoftherequestTable15.1:FewoftheHTTPRequestclassproper