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Questions tagged [postback]

A postback is a technique in web development in which a page sends an HTTP POST back to the same form on the server.

The term postback has two meanings depending on the context, one in relation to web development, and one in relation to open-source software.

In the context of web development, a postback is a page sending an HTTP POST back to the same form on the server.

In the context of open source software, the term "postback" is often used to describe making your changes available in source code form. Questions that would use this meaning of the tag are generally off-topic on Stack Overflow.

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ASP.NET C# CheckBox CheckedChanged Event Causing Full Postback & Clearing Controls

I am loading a set of CheckBox controls into a Placeholder which is part of an UpdatePanel as below: …
Adam92
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Setting button invisible with event not working

I have a Visual Basic Project where I have a page(Parent.aspx) with a user control inside(ChildForm.ascx), the user control have a checkboxlist where if the selection is changed I cause a postback and send an event Protected Sub…
Julissa DC
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On click of a button,obtain the selected value from a checkbox list which is present in a div

I have a aspx page in which there is a div. On click of a button the div is being displayed. The div contains a list of checkboxes and an "apply" button. If some values in the list are checked and the apply button is clicked, the selected value must…
rocker
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DropDownList not maintaining ViewState for "User Mode Menu" Selector

I'll keep this simple. For development purposes I want to create "modes" representing various user types which will see a different menu bar accordingly. I've got everything the way I want it except after selecting the "mode" in which I wish to…
Chiramisu
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Want to cause a postback after closing a Shadowbox

I have a site which uses Shadowbox-JS to bring up a settings page when a user clicks on a little icon. The settings are there for the user to be able to customise their view of what they're looking at in the main application. The settings page is…
Arj
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jquery pop up asp.net problem!

I have a problem with getting this pop-up jquery: http://www.htmldrive.net/items/show/431/jQueryNotice-animated-notification-tooltip script to work in a shop which is coded in asp.net. When a product is added to the basket, I would like to have a…
Pete
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ASP.NET / VB.NET: Reference a Textbox value without postback?

I have a child aspx page in an iFrame. There are a few textboxes, which are populated in the page load event. There is also a LinkButton which the user clicks when s/he is finished editing the fields. There are some javascript functions and other…
user724198
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AspNet DataSet TableAdapter seems to not refresh data between postbacks, until page refresh

I have a GridView with several TextBox TemplateFields. When a value is entered into one of them, I want to postback, update one of the SQL Tables that it's pulling data from, then pull that new value into the GridView after the postback. In the…
MRoads
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Why does __LASTFOCUS hidden field show up on only some ASP.Net pages?

I'd been using the hookonfocus method from this article: http://www.codeproject.com/KB/aspnet/MainatinFocusASPNET.aspx to maintain focus during postbacks for certain .aspx pages. However, I've noticed that several pages (and some very simple pages…
user645280
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MVC3 Using Javascript to postback similar to how $.post works -- but with an actual postback?

I have an ASP.NET MVC3 app that features a form with a nested-table input (Ie on each row I can add a sub-table, with no limit on depth) To handle this for my MVC app, I've created 2 javascript classes(using this term loosely with js:) that mirror…
Yablargo
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ASP.NET dynamic controls data exchange in postback

Please excuse me for a probably low quality of this question, since I'm not a web dev, so I possibly don't now some obvious things and don't know what to Google for. I think problem must have some simple solution, but I'm struggling with it for two…
Petr Abdulin
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Looking to delete dynamiclly created labels on postback in vb asp.net

I have a form that has an array of dynamically created labels of varying size based on a search from a database. The problem I'm having is that when the user searches for a different term, it looks like some of the labels don't get new values. …
spuppett
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Embedded Gridview Postback into EditMode

I have a page I'm working on with a Gridview embedded into a Gridview. The page uses templates to fill itself out, including the edittemplate for rows. When the row is in edit mode, 3 of the cells contain dropdownlists. I'm trying to filter these…
Joseph
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Linked Button inside grid view causing full post back when using update panel with grid view

There is a button outside update panel, the click event of the button binds grid view. Grid view is inside the update panel and there is a link button inside the grid view. Link button is causing full post back, i have looked online and tried…
user1263981
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Request.Form[MyControl.ClientID] is Null

I've noticed that, during a postback, Request.Form[MyControl.ClientID] is null. However, Request.Form[MyControl.Name] contains the expected value. This is unexpected. Is this documented somewhere?
Jonathan Wood
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