Web Forms :: Difference Between Pageload And Page Postback?
Dec 14, 2010Whats the diffrence between pageload and page postback in asp.net
how it affect on page life cycle.
Whats the diffrence between pageload and page postback in asp.net
how it affect on page life cycle.
I have a masterPage on that i am using AjaxModalPopup for login purpose.My requirement is when i login via Master page then it should show the Logged-in User details on the current Content Page that is using same master page.
Here i am using following code to get it back to the same content page after succesful login but it does not show the user details on the same content page rather when i go to next page then it appears.
if (Session["SignedIn"] == null)
{
ValidateUser();
ModalPopupExtenderMaster1.Hide();
string currentPageUrl = System.IO.Path.GetFileName(Request.Url.AbsolutePath);
Server.Transfer(currentPageUrl);
}
But it does not gives user-details on the same content page.
My question is - what is the difference between page refresh (if I press f5) and postback (If I press a button)?
View 3 RepliesI have a textbox with a regex validator attached to it and some stuff in the ontextchanged code behind. This all works fine unless I start the textbox out with Visible=false. Obviously, I'm setting the textbox.Visible to true later on in the codebehind, but when I do this, no postback occurs when the text changes. I'm pretty sure I have isolated the cause to when I change the visible property, but has anyone seen anything like this or know some sort of work around?
View 1 RepliesI am tryign to make the master page code globally do some chaecking before the content page loads. Pageload event in Masterpage is executed after the content page for some strange reason. How do I go about this?
View 10 RepliesI have an unbound gridview which is bound to a dynamically created datatable during the pageload event of my page. A simple matrix with x columns and y rows. I need all the cells to be the same size. I'll display my code below.
[Code]...
In my Home page I have a link to my Details page. When I click on the link it goes to the Details page Page Load Function like its suppose to, but when it finishes it goes back to the Home pages Page Load Function. Then loads the Details page. So it parses the old pages Page Load Function for somewhat no apparent reason, because in the end it loads the Details page. This only happens when I click on the link to my Details page. When I click on other links to other pages, it doesn't do this. For some reason only my Details page. I went through the code to see what could be causing this but have no clue. I included below the complete .aspx.vb for my Details page. What could be causing this? Again this ONLY happens when going to my Details page.
[Code]....
I'm at my wits end on this one looked/Searched/Played/Experimented and I need your help if you can.This page is going to be primarily used on a mobile device using Win Mobile 5 Need to Accomplish:Prevent Postback(serverside) of Page using JavaScript (Postback's slow down the page on mobile device)
[code]...
can you define autopostback and postback and it's differences and which web server control support autopostback and postback and also the difference between postback and callback?
View 3 RepliesIs there a difference, or are the terms synonymous? i could only find the difference between a full postback and a callback. I'm already aware of how a full postback is different.
View 1 RepliesI am dynamically creating dragrids in different rows of an existing datagrid in asp.NET
My generated datagrids have a column which is TemplateColumn (a CheckBox Column).
In my parent datagrid, I have a template column with checkboxes. when I check or uncheck the value of the check box, the check_change method is called (autopostback is set to true), the dynamically generated datagrids lose the checked checkboxes (the checkboxes are all unchecked again). However, if i check any of the checkboxes of the child (dynamically generated) grids and press F5, it refreshes the page but still I have my checked checkboxes.
What's happening ?? how is post-back different from refresh F5??? understanding this might help me fix my problem here :DataGrid not being altered!
How to call a Javacript method in a PageLoad of a Page?
View 5 Repliesi have many aspx pages in one folder (100 pages) and they will keep increasing. I have 1 vb.net file which has the code for these pages. Can i call that pageload event in vb.net file from all these pages?
currently im using this code, but its not reading the pageload event.
[code]....
vb.net page code -
Public Module NewOne
Public Sub NewOne_Load(ByRef Page As Web.UI.Page)
end sub
end module
I have 4 user control in my page. Will asp.net ajax pageLoad method fire for each of these usercontrol or only once for the page?
View 1 RepliesIn my page without using updatepanel page open firsttime it fires only single time, after using updatepanel page load fires twice firsttime page open.. how to solve it.
View 1 RepliesI know how view state works but I do not know how exactly works RegisterRequiresControlState. Where are stored values from control? How exactly does it work?
View 1 RepliesWhat is the difference between iframe and master page. which is better to use. Now I am using iframe in all my applications .
View 1 RepliesWhen an asynchronous postback happened inside update panel, another postback happens also for MasterPage not only update panel embedded page .
I want to prevent this MasterPage postback .
is this possible ? think like i have a MasterPage
and another page which is test.aspx which is content page of MasterPage
i have update panel at test.aspx
when asynchronous postback happens at this test.aspx update panel it also loads MasterPage Page_Load
i want to prevent this (it should not also load MasterPage Page_Load)
While going through MSDN I found that in button properties useSubmitBeheviour there is written that if useSubmitBeheviour is true then it cause the Button control to use the browser's submit mechanism and false then the ASP.NET page framework adds client-side script to the page to post the form to the server.
View 2 RepliesButton.UseSubmitBehavior property is used to gets or sets a value indicating whether the Button control uses the client browser's submit mechanism or the ASP.NET postback mechanism.
So, What is the difference between client browser's submit mechanism and the ASP.NET postback mechanism?
When an asynchronous postback happened inside update panel, another postback happens also for MasterPagenot only update panel embedded page .I want to prevent this MasterPage postback . is this possible ?think like i have a MasterPage and another page which is test.aspx which is content page of MasterPagei have update panel at test.aspxwhen asynchronous postback happens at this test.aspx update panel it also loads
MasterPage Page_Loadi want to prevent this (it should not also load MasterPage Page_Load)
iam using the Jquery Uframe with asp.net project.Iam getting a postback problem here.
In side the uframe ,button control getting postback the page even the client side method call also.
i tried with the Html button Control also by setting the type="submit" ,iam facing the same problem.
And I got very limited reference about the uframe(codeflex,codeProject).
I am trying to understand different events in a Asp.net page life cycle. I came across to this link. It has two stages Load view state and Load postback data. I used to thought that these both means the same thing. But this article says, that postback data is not viewstate data. I don't understand this.
View 5 RepliesI have an aspx application with 2 aspx pages. Second aspx page will get opened on click of a button in first aspx page using JavaScript. The problem is, when the second aspx page is getting opened, its Page_load event is not firing. Only when I refresh the second page, page_load event of second aspx page is fired. what might be the problem and what is to be done to fire the page_load event.
View 1 RepliesI have a page in which I am not using cache by using this code:
HttpContext.Current.Response.Cache.SetExpires(DateTime.UtcNow.AddDays(-1));
HttpContext.Current.Response.Cache.SetValidUntilExpires(false);
HttpContext.Current.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
HttpContext.Current.Response.Cache.SetNoStore();
Now I want to know: Is there any difference between coming to this page using a proper link or coming back using browser back button, or is there any way to detect this?