网络基础编程ppt课件.ppt

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1、TheFundamentalsofWebProgrammingChapter6ConceptsaboutASPInformationDepartmentofSIEEinCUMTForm表单ASPonserversideDatabaseFormisaninterfacebetweenbrowserandserver.TheinformationcollectedbyformwillbesentthroughtheInternettotheserver. Theserverprocessestheinformationandthensendsbacktheanswertothebrowser.H

2、TML,ScriptandFormonclientsideQuestionsHowtheinformationcanbesenttotheserver?Whichprogramwillreceivetheinformationandprocesstheinformation?HowtheanswercanbesentbacktoBrowser?MethodandActionattributesinformAttributesofMethodandActioninFormMETHODisthewaytosendtheinformationcolletedbyformtoWWWserverspe

3、cifiedintheform.Therearetwodifferentwaystosendvaluestoawebserverspecified,POSTandGET.ACTIONspecifiesthelocationoftheprogramtoprocessthecollectinginformation.Example:InPOSTMETHODtheserverspecifiedintheACTIONattributeoftheformtagiscontacted.Aftercommunicationhasb

4、eenestablished,theinputvaluesaresenttotheserver.Theserver,ifproperlyprogrammedandconfigured,willechobackthevaluesthatweredeliveredwhenaformissubmitted.InGETMETHODthevaluesareaddedtotheURLspecifiedintheACTIONattribute.Andsendinasinglecommunication.Exampleofthetag:

5、”>MethodandActionattributesinformFriend;Teacher
JavaScript
VBScript
Name:

6、PUTtype="text"name="name"size="20">
Radio,Checkbox,Text,SubmitandResetinformRadio,Checkbox,Text,SubmitandResetinformRADIOSinglechoicebuttonForvariableswhichcantakeonlyasinglevaluefromasetofalternatives.Ifs

7、everalradiobuttonshavethesameNAME,selectingoneofthebuttonswillcauseanyalreadyselectedbuttoninthegrouptobedeselected.CheckboxMulti-choicebuttonForBooleanvariables,orforvariableswhichcantakemultiplevaluesatth