page-lifecycle

I've recently ran into some code that checks Page.IsCallBack but I wasn't sure how it is different from Page.IsPostBack . Can anyone enlighten me? Edit : Are they mutually exclusive or can both occur at the same time in a given situation? TStamper Page.IsCallBack It is getting a value indicating whether the page request is the result of a call back. Its a special postback, so a round-trip always occurs; however, unlike the classic postback, the script callback doesn't redraw the whole page. ViewState is not updated during a callback, it is for postback. Page.IsPostBack Checks whether the Page

I just developed my first xamarin.forms app. I am excited about xamarin.forms, but I miss several events. Are there any page-lifecycle-events in a xamarin.forms ContentPage? I know of these two: protected override void OnAppearing() { } protected override void OnDisappearing() { } But the OnAppearing() event only fires once. On Android, when I push the start button and go back to my app, this event does not fire again. Is there a workaround for this (like OnNavigatedTo in WindowsPhone-pages)? Thanks. So the OnAppearing event is fired when your page is appearing. I.e. you have navigated to that

In order to more understand the clientID generation in JSF (2.x), could someone explain to me when exactely does JSF generates the client ID (which lifecycle phase, build time or render time ...)? And how the client ID will be generated (if providing /not providing component ID and not, randomly or using a specific logic...) ? BalusC In order to more understand the clientID generation in JSF (2.x), could someone explain to me when exactely does JSF generates the client ID (which lifecycle phase, build time or render time ...)? It has to end up in HTML response. It's thus generated during

Question #1 I want to know when am I supposed to use: Session.Abandon() // When I use this during tracing and after calling it- I find the session still has a value. And when am I supposed to use : Session.Clear() When should I use each specific method? In general? In my specific case? I check if session is not equal null in Page Load. If session is equal to null, I wanna to clear session and redirect to the login page? Should I use something like this: private void initSession() { Session.Clear(); Session.Abandon(); Response.Redirect("LoginPage.aspx"); } Mike Veigel In ASP.NET, when should I

I was asked to explain the ASP.NET page life cycle in an interview some time back. I did explain it to him, but he was not satisfied with my answer. Could someone explain the life cycle to me please? Elias Hossain You can see: ASP.NET Page Life Cycle Diagram , The ASP.NET Page Life Cycle (by Solomon Shaffer) Microsoft Developer Network There 10 events in ASP.NET page life cycle and the sequence is :- Init,Load view state,PostBackdata,Load,Validate,Event,Pre-render,Save view state,Render and Unload. Below is pictorial view of ASP.NET Page life cycle with what kind of code is expected in that