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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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.net server control performance compromise

We are finding that for a large sets of data server controls (with the amount of postbacks) they do often times result in a very slow performance. While we don't want to do all the business logic in Javascript, we would like to speed things…
sarsnake
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Is it normal for Page_Load to trigger upon clicking a page of a GridView inside an UpdatePanel?

I have this code in my aspx page:
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Răzvan Flavius Panda
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Why is __doPostBack() not firing my bound load events?

Here's the situation: I have a variable number of dynamically created update panels on my page, so I thought I would write one method which handles all of the loading for each one. My Updatepanel creation looks something like this: Dim newUpdp As…
Andy F
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Avoid postback on button click

I have a Search feature. if the search string is empty and user clicks "GO" then the postback of the gridview shouldn't happen and the alert (as mentioned in below code) should get fired up. My gridview is in update panel. Below is the logic that i…
xorpower
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ASP.Net deployed site does not act the same as dev site

EDIT We are finding a bit more out. Turns out that if you go to the site regularly it doesn't work, but if you manually type /default.aspx on the address bar the functionality works fine. We are working at deploying a new site and are stuck at…
James P. Wright
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asp.net ajax javascript postback

I am having a very basic application containing 1 label and two drop down lists. You select a player name from the first drop-down and immediately the corresponding country will be displayed in the other drop down list. Here is the markup: <%@ Page…
Varun Sharma
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make Enabled to false and set focus When Updatepanel is used

UpdatePanel may not be related but, I heve this code:
user16242098
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Updating ViewState using jQuery

I started to use jQuery more intensively and especially .ajax() in jQuery. I would like to know if it is a good idea to manipulate ViewState using .ajax() or if there is a better way to manipulate ViewState without a full postback.
mko
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Dropdownlist returns null with partial page post back

I'm trying to read a value from a dropdown list after a partial page post back. For some reasons, it's always null. ASP:
dam
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ASP.Net links won't disable if done during postback

I'm still fairly new to ASP.Net, so forgive me if this is a stupid question. On page load I'm displaying a progress meter after which I do a post back in order to handle the actual loading of the page. During the post back, based on certain…
GRB
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Check condition before some postback

In my scenario i have many asp.net button in the page. Each asp.net button when rendered on client side has a strucutre like the following : Some of the button in…
Skary
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Custom action after sending Infopath form

I'm using a browser-enabled Infopath form with Sharepoint 2010 and I want to show a modal popup or even redirect to another page after clicking on Submit, saying "Thank you... Your form has been sent...". I can't use a View (and change to that view…
CalypsOOO
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Asp.net checkbox in update panel is losing its functionality after checked and unchecked (2 hits)?

I have a gridview which includes a column of checkboxes down the left side and a 'master' checkbox above them to check or uncheck them all. The thing is after 2 hits to any checkbox, it loses its functionality. Not the master checkbox tho, it keeps…
toofast88
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How to post back data from client o server

I am using asp.net post back method to send data from jQuery MessageBox to server. Is this correct way to send data to server without refreshing whole web page? What would be other alternatives? default.aspx client code function confirmDelete(id) { …
Tomas
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post back dropdownlist

on this site when dropdownlist contains only one item, when clicked it doesn't cause a post back protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { DropDownList1.Items.Add("a"); …
ashkufaraz
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