AJAX :: Generated Image Does Not Update On Postback Page Load?

Jan 26, 2010

I have a dynamically generated image placed inside an update panel. The image is generated with the Generated Image control (see here for more:

[URL]. This is basically a specialised httphandler linked to a normal asp:image, where the image src is generated dynamically. In my case, I use some GDI+ to dynamically generate the image, based on values from a database query.

The problem I have is that the image does not update when the update panel updates. The image does, however, update if I manually reload/refresh the page (i.e., hit F5). Why is is that some code fires during an update panel update, and not other code? And, more importantly, what can I do to make sure the image generation code does fire during the updatepanel update?

[Code]....

View 3 Replies


Similar Messages:

AJAX :: How To Load Update Panels After Page Load Complete Event

Apr 11, 2010

I have a update panel on the ASPX page,When thepage loads the content in the update panel shouldnot load ( Update panel should show the Updatepanel progress control) but after page load update panel contents should load . How do i get this efect.

View 3 Replies

AJAX :: How To Prevent Master Page Postback When Update Panel Asynchronous Postback Happened

Oct 15, 2010

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)

View 3 Replies

AJAX :: Update Progress Load Image In Modal?

Mar 15, 2010

I want to show update progress Loading image in modal dialog box.

View 1 Replies

AJAX :: HTML5 FileUpload Image Preview Disappears On Update Panel PostBack

May 7, 2015

My combobox and asp:fileupload and imagepreview all are inside update panel , my combobox is doing postback after which my image disappears.... how to retain back image after postback ?

In [URL] .... if I remove input:file and put asp:file then it will be possible ... here's all code:

using System;
using System.Drawing;
using System.IO;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Default3 : Page

[Code] ....

View 1 Replies

AJAX :: How To Stop ModalPopupExtender Flickering On Page Load And PostBack

May 7, 2015

I used popup in my page below is my code:

<asp:UpdatePanel ID="Upbdt2" runat="server">
<ContentTemplate>
<asp:ModalPopupExtender DropShadow="true" ID="ModalPopupExtender2" PopupControlID="PnPopup2"
runat="server" TargetControlID="BtnPopup2">
</asp:ModalPopupExtender>

[Code] ....

When I click on BtnPopup2 it show popup menu...

I have other button BTNinsert that when I click on this button it insert data into database now problem is that when I click on  BTNinsert it show popup for 1 second  and after that insert data into  database and if I refresh page it shows popup again for 1 second I want when I click on BTNinsert or refresh page it doesn't show popup just for a second...

View 1 Replies

AJAX :: Modal Popup Panel Not Hiding On Page Load / Hides On Postback

Dec 14, 2010

When I browse to my page that has the modal popup panel on it, the panel initially is visable, and when I do a postback it acts as intended. let me know if you need the master page....

[Code]....

[Code]....

View 2 Replies

AJAX :: Update Panel Fires Page Load?

Dec 30, 2010

I have a script manager and 3 update panels on my page. I am not very familiar with AJAX but I would think anything in the contentTemplate would not cause a postback and page reload, but they all do, here is the outline of the SM and UpPanels

<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="sm" runat="server" />
[code]...

View 7 Replies

AJAX :: Update Panel Keep Focus On Page Postback ?

May 31, 2010

I've got a page that posts back constantly and if im on the inputbox thats instide the update panel i loose focus on postback

how would i get it to recognise that im on the textbox in the update panel and keep focus on it.

View 3 Replies

AJAX :: Postback In IE Fails When Having Update Panel In The Page?

Feb 23, 2010

It works fine in Firefox but in IE 7 fails doing the postback sometimes. Is it just a problem with my browser? The partial postback inside the update panel works great in both browsers, but when I hit the button outside the panel, the complete postback doesn;t work in IE....

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="PruebaPostBack.aspx.cs" Inherits="Administrator_Treatment_PruebaPostBack" %>

View 2 Replies

AJAX :: Upload And Display Image Without Page PostBack

May 7, 2015

I use asp file upload control to upload an image on my web application.

on its change event like this--

<asp:Image ID="Image1" runat="server" Width="77px" /> </td><td style="width: 350px; height: 8px"> <asp:FileUpload ID="FileUpload1" runat="server" onchange="if (confirm('Upload ' + this.value + '?')) this.form.submit();"/>

i dont want to refresh page while uploading an image.

View 1 Replies

AJAX :: Update Panel For Page Load - How To Show Progress

Dec 14, 2010

I try to use Update Panel for the loading of next page using C#. How do I do once the page is loading then update panel will show theprogress

View 2 Replies

AJAX :: LinkButton Inside Update Panel Is Updating The Whole Page On Postback

Aug 3, 2010

I have a link button inside an update panel. The problem is the link button on postback is updating the whole page. Tried it with a normal button and the page is not refreshed all. Here's the code.

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

View 5 Replies

AJAX :: Avoid Page Flicker On Postback And Update Only Specific Controls?

Nov 10, 2010

From one of my webpage, I am opening up another form as ModalDialog, and on this form, I have a Grid, Treeview and some other controls.

[Code]....

I have some code on click of Treeview Node, I fill out other data in Grid on click of Treeview Node.

Now the problem is when page posts back ( on click of Treeview Node ) , page flickers once during filling up data in Grid.

Basically whenever page.ispostback is true, page flickers, Now I want to avoid this.

I have to keep "SmartNavigation="false"" on this page because of some of the Treeview Problems.

Specifically on Node click of Treeview and on Update button press.

View 3 Replies

AJAX :: Load MS Chart Every Time When Page Loads Or Button Clicks In Update Panel

Mar 7, 2011

I have 2-3 update panel in my page and i don't want to load chart every time when my page loads or button clicks etc. I put that in update panel with triggers means only some clicks should loads chart. but that chart gets loaded everytime. how to stop that from loading

View 2 Replies

AJAX :: Page Inside Update Panel Doesn't Refresh The Session Object After Postback Of Any Control

Oct 1, 2010

I have many controls like dropdown, radiobuttonlist, etc on my page and I put all these controls inside the update panel so that the page doesn't look to be posting back when something is selected. Now the working on the page is very smooth. But the session object isn't getting refreshed even if I postback to the server and as a result even if the users are working on the page they are being sent to the login screen after 20 mins.

Is there anyway where I could put all the controls in update panel and still refresh the session after any postback(dropdown selection)

View 4 Replies

Jquery - Postback In Chrome Preventing Image Load?

Feb 25, 2011

I'm doing a postback to generate a chart. When the user clicks the button it is using jQuery to add some html to the page to show an animated gif and an overlay.

This works fine in IE and FF but in Chrome the image doesn't load. Anybody know what's going on here?

While looking into the problem I noticed that if I run this code in the JavaScript console it works, and it will work as expected after running it in the console (displays image on postback).

Here is the code I'm using to add the html:

$("body")
.append("<div class='ui-widget-overlay working'></div>")
.append("<div class='ProcessMessage working'><img alt='Loading' src='images/indicator_big.gif' /><br /><br />Loading...</div>");

View 1 Replies

How To Prevent Master Page Postback When Update Panel Asynchronous Postback Happened

Oct 15, 2010

When 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)

View 2 Replies

AJAX :: Page Is Refreshing On Click Of Image Button Inside Update Panel

Sep 6, 2012

I have 4 Image buttons on my user control and on the click of that Image button, I am opening new pop up window. I had used update panel but still it is refreshing the page. I don't want to refresh my page on the click.

<asp:UpdatePanel ID="SharePanel" runat="server">
<ContentTemplate>
<div class="full">
<h3>Share :
<asp:ImageButton ID="imgFB" runat="server"
ImageUrl="http://localhost:49524/mysite/Images/facebook_ico-1.gif"

[CODE]....

View 1 Replies

AJAX :: How To Know Postback Was Due To Update Panel's Partial Update

Nov 25, 2010

when postback occurs due to update panel's child control then in page load event how can i know that it was dut to update panel ?i.e., i want to differentiate between general postback and postback due to update panel's child control in page load event .How is that possible ?

View 10 Replies

C# - How To Load New Page On Postback

Aug 19, 2010

I have a master page that has a usercontrol on the left side of the page with a dropdown. When the user selects a value from the dropdown I need to load a different aspx page. The new page has a similar (but not the same) looking usercontrol on the left and different content on the right. How can I do this? Also, when the new page is loaded the dropdown must remember its selection.

View 2 Replies

AJAX :: Way To Show Image On Update Button Click In Formview Or Update Panel

Jun 21, 2010

I have a formview in Edit Mode, within an update Panel all and these arewithin a Modal Pop Up extender.On clicking Formview Update button, I want an image to appear within the pop up.I have put the image within another panel1 and runat server.For some reason the image is not showing on clicking update button.

View 13 Replies

AJAX :: Unable To Load The .js After Postback

Mar 2, 2011

Asp.net.3.5 ajax + jquery

Well I am including the .js files on preRender event and before of the first post back its working - but filed to load after the postback

[Code]....

View 3 Replies

AJAX :: ComboBox Load Slow On Postback?

Feb 23, 2011

I have a situation where I need to have close to 30 drop down lists on one form. The user also wants the autocomplete functionality. I decided to use the ASP.NET AJAX control. So that the page will load faster I hide them until they are needed. But, as more and more become visible the postback time is getting longer and longer.

I know this can be fixed, but I'm not sure how. Can anyone give me any advice, point me to some articles? Do you have a suggestion for another method of doing what I need? Maybe, I shouldn't even be using ComboBoxes for this?

View 2 Replies

AJAX :: Display Light Box Loading Image On Page When Update Panel Is Loading

Mar 6, 2013

I have update panel on the page to avoid postback and placed a dropdownlist control within that update panel. DrodownList is filled with Category names and also it's autopostback set to True.

Now whenever dropdownlist index change's on select, untill page loads complete  data it should show mesage as "Loading.... in center and middle of the page and background should become bit transparent". And when page load completely with data then that background and message should get disappear.

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved