Web Forms :: Prevent Posting Back To Page Load Method?
May 25, 2010
I have a button on my web form. When it is pressed, the event method for that button is called as it should be. However before the buttons method is called, the page load event is first called. Is there a way to prevent the page load event from being called when the button is pressed? I know about using !Page.IsPostback in the Page load method. However I wish to avoid posting back to the Page Load method altogether when this particular button is pressed.
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Similar Messages:
Jul 30, 2010
I found alot of thread about how to postback after close the modal popup.
But for me, the system has already did it for me.
How to prevent page from posting back?
here's my code
[Code]....
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Mar 15, 2011
I am trying to implement autocomplete using JQuery. I cannot get this to work directly from my view so I am trying to post directly back to a method in my controller that has a reference to the web service. How do I post directly back to a method in my controller?
My method name is Autocomplete URL: "/" - Takes me to the Index method of my main controller. I want to go to a different method so I can return JSON back
Code below:
[Code]....
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Feb 8, 2011
I am loading an aspx page into a div using jquery.load(). The aspx page loaded into the div has a datalist. Each datalist item has a linkbutton. My problem is that the linkbutton is not causing a postback though. Strangely, if I change the linkbutton to a button, it does postback. Also, when loading the page normally (not from a jquery.load event), the linkbutton performs correctly. What is it that causes the linkbutton to not cause a postback when loaded this way? And is there a better way to handle this?
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Jan 31, 2011
when any Button control is clicked generally it Postback the page to itself, and the same page is regenerated.This is the usual defination of postback in context of a Button Control. But my dear friends i am confused that what is the actual mechanism behind this.Okey say for definition the above statement is fine but believe me i not not getting the actual meaning.What is posting back the Page? What is Page in browser's context? There is only html markup, JavaScript and CSS codes in browser's page.These make up the html page. I think there is no any relation of this Browser's page with ASP.NET Page class. What does it mean that browser's content is posted back to the Page itself ?
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Mar 13, 2010
I have a problem of posting back in my website in some browsers. The Problem is: When I am uploading a file using file upload and button or posting page back on some event click after button click I am using:
ClientScript.RegisterClientScriptBlock(Me.GetType, "AddData", "alert('" & f_u_devideo.FileName & " Uploaded Successfully');", True)
But after that the page not not load again and a blank page comes in some browsers
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Sep 21, 2010
I have a master page and some child pages, i want that when i navigate the child forms, my should not post back, only the inner should navigate
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Jun 15, 2010
I have an aspx page that has...
if (!IsPostBack)
{
PopulateBrand();
in the Page_Load. This PopulateBrand() simply populates my drop down. That works great and on post back it retains the value.
The problem I'm having is that there is also a link on the page that is posting back some parameters to this page. What is happening is that when this is clicked it's falling through this !IsPostBack section and wiping out my drop down values that I had selected and repopulating it.
How can I prevent this and just retain what I selected when this page is posting back to itself when the link is clicked?
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Jan 15, 2011
How is a page kept where the user last clicked, instead of scrolling back to the top?
I have a page of controls, the user scrolls down to three dropdownlists to fill out, but when he clicks the first one, the page always scrolls back to the top, and he must scroll back down to the dropdownlists again.
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Apr 20, 2010
Is it possible to stop my page posting back when the user presses the enter (return) key..?
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Jan 9, 2011
Got a pretty simple page where i want an update panel to become visible or hidden based on a button click. When i run this page in VS2010 in debug mode it works as i expected it to - page does not post back, the panel just appears or disappears on the page without the whole page refreshing.
I uploaded this to my server, and the page is posting back when you click the button.
Server is win2k8R2 x64 IIs7.5
Do i need to enable anything in the IIS configuration?
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Mar 31, 2011
I basically want to show a dialog box with confirm or cancel options on it.
Confirm should allow the partial postback to take place, cancel should not. I have tried using a trigger and calling __doPostBack() as advised here but it posts back the full page not just the panel.
$('#buttonInUpdatePanel').live('click', function (event) {
event.preventDefault();
var item = this;
var title = 'Confirm';
var msg = 'Please confirm something';
var $dialog = $("<div id='myDialog'></div>")
.html(msg)
.dialog({
modal: true,
buttons: {
"Confirm": function () {
$(this).dialog("close");
__doPostBack('Button1', null); //tried this and .submit() on the button
//return true;
},
"Cancel": function () {
$(this).dialog("close");
//return false;
}
},
title: title
});
});
My UpdatePanel:
<asp:UpdatePanel ID="UpdatePanel2" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<asp:TextBox runat="server" ID="TextBox1" />
<asp:Button
ID="Button1"
Text="Add"
OnClick="AddExtraVehicle_Click"
runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
UPDATE:
I have changed the doPostBack to use the button ID now and commented out the return true and false lines. When I click the button it calls the confirmation dialog but when you click on confirm it appears to do nothing. I was expecting a call to the method AddExtraVehicle_Click but the breakpoint didn't trigger.
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Jul 25, 2013
When I click Logout page redirect to Login page but when click to browser arrow back then it will goes back, I want to after Logout cannot going to back page...
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Dec 30, 2010
I have read that you can not disable the back button on page load but I can clear the cashe on page load so the back button would then be greyed out. I have read a few articles on this and I am unable to get it working. I am using MS visual web developer 2010.
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Jan 1, 2011
I used the following code for the form download
[Code]....
But form is not posting back on execution of the above statement. What should I do , so that form postback also occurs after this statement.
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Jan 21, 2011
I am trying to implement Login/Logout functionality in my website without using inbuilt functionality of Login controls in ASP.NET. In some pages, which require the user to be logged in, I have written this in Page_Load
if (Session["cod"] == null && Session["admin"] == null)
{
Response.Redirect("You need to Login.aspx");
}
if (Session["cod"] != null || Session["admin"] != null)
{
LinkButton1.Text = "Logout";
}
if (Page.IsPostBack == false)
{
log_bind();
grid1_bind();
grid2_bind();
}
But while I was testing this, I noticed that when I press the Back/Forward button on the browser, these pages are viewable without being logged in. How do I prevent this?
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Mar 30, 2010
I want to call a javascript method during page load. I am using application.master of the sharepoint server 2007 as the master page . In the content page i want to call a custom method named OnLoadFun() during loading the content page. I have written the function inside script tag in the PlaceHolderAdditionalPageHead id section of the content page.
[Code]....
How do i call the OnLoadFun method so the i is being called onload time. i tried putting window.onload=OnLoadFun surrounded by script tag within the PlaceHolderMain content section.
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Jun 22, 2010
I have a page that add Items to RadioButtonList with this code :
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
RD.Read()
RBQ1.Items.Add(RD.GetString(3))
RBQ1.Items.Add(RD.GetString(4))
RBQ1.Items.Add(RD.GetString(5))
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Feb 10, 2011
I have a method I want to run each time some certain pages are loaded.
I want this because I want to compare a session ID that i have stored in a database up against the current session ID that the user has.
How can this be solved? I do not want to put the code in the Page_Load method of every relevant page.
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Jun 25, 2010
i placed my grid control and FromView control in the same page, the problem is when i click on the "update" in the grid control, the field validation control in my FrormView get excuted and the page would not post back to the server.
How can i update the grid control with-out posting back the Formview.
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Apr 21, 2010
I have as asp.net website the code behind is C#.
i my application Page load method is firing two time.
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Dec 6, 2010
how can i update another dropdownlist without posting back. i've seen the sample somewhere but its not doing anything.
Code:
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="false" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem Value="0">----Select----</asp:ListItem>
<asp:ListItem Value="101">General Admin</asp:ListItem>
[code]...
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May 24, 2010
Here's the code I'm using but it's not working.
[Code]....
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Dec 23, 2010
[Code]....
I have the above code, on the get method I do the following.
[Code]....
It only hits the index once after loading the page. It never goes to the index method.
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Feb 25, 2011
I have a keyboard-controlled menu which I did with jquery (When I press down, it marks second option and so on...)
But after I select the option I need, I want to click enter to call the button's OnClick method as if the user really clicked it. Which means I have to do a postback.
how do I do that?
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