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Internetteknologi 2 (ITNET2) Kort teknisk ASP.NET introduktion Mandag den 4/4 2011

Internetteknologi 2 (ITNET2) Kort teknisk ASP.NET introduktion Mandag den 4/4 2011 Jesper Tørresø. ASP.NET ”Programmørernes websider”.

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Internetteknologi 2 (ITNET2) Kort teknisk ASP.NET introduktion Mandag den 4/4 2011

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  1. Internetteknologi 2 (ITNET2) Kort teknisk ASP.NET introduktion Mandag den 4/4 2011 Jesper Tørresø

  2. ASP.NET ”Programmørernes websider” • Eller rettere ASP.NET er webapplikationer hvor brugergrænsefladen er distribueret ud i en browser og logik, databaser etc. ligger bag en webserver (en http server). • ASP.NET stiller sammen med webserveren et applikations-framework til rådighed. • Visual Studio 2010 stiller en IDE til rådighed for dette framework

  3. Domænet

  4. Domæner og klasser i frameworket ”Styre showet”

  5. Application Framework

  6. Kontrol og tilstand • Adgang til ”kontrolklasser” (En kontrol ændre en tilstand) • Eksempler: HttpRuntime, HttpApplication • Adgang til ”tilstandsklasser”,herkan fx placeres data med forskelligt scope(Data er tilstand) • Eksempler : Application Session RequestViewState

  7. Page Life Cycle (View and Control state)

  8. Events i en “Page Cyclus”

  9. Afprøv eksempel Fra følgende links http://www.altafkhatri.com/Technical/ASP_NET_Page_Life_Cycle_And_Events/Common_ASP_NET/Page_Events Koden kan hentes på Campusnet

  10. AutoEventWireup !!! • AutoEventWireup="true" means that to wire up an event all you have to do is name the event in your .aspx page, like for a DropDownList: <asp:DropDownList id="ddl1" runat="server" SelectedIndexChanged="ddl1_SelectedIndexChanged" /> • and in your code behind or in the script section: protected void ddl1_SelectedIndexChanged(object sender, EventArgs e){ } • Without the autoeventwireup, you would have to subscribe to the event manually (wire up), for example, in your Page constructor: this.ddl1.SelectedIndexChanged += new EventHandler(ddl1_SelectedIndexChanged) • So basically, the above line is done for you with AutoEventWireup="true" • AutoPostBack="true" just means that when the textbox loses focus, if the contents have changed, the client's browser (thanks to javascript) will post the page. Above explanation from http://forums.asp.net/t/1386298.aspx.

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