How To Ensure All Graphics Loaded Before Page Is Rendered

Dec 1, 2010

I can remember reading something on this in a book but I can't remember. How do you ensure that certain graphics have been loaded to the users computer before any of the page is rendered?

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Does anyone know a good tutorial to add a loading image to your webpage while the content is being rendered/created...

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We are rendering usercontrols dynamically like this:


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I am not sure on where to check the exact issue for.Will it be any caching related problem?.

In IE it is just not opening the download window which we will obtain when the rendered html content type is changed and response stream flushed.No exception is thrown.

I received the following response header :

HTTP/1.0 200 OK
Cache-Control: private
Content-Length: 15189
Content-Type: application/;
charset=utf-8 Server: Microsoft-IIS/7.5 X-AspNet-Version: 2.0.50727
Content-Disposition: attachments;filename=NewAccountForm.doc X-Powered-By: ASP.NET
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I am working with .net c#. Is there a way to see the rendered html code under the updatepanel?

more info:

I dynamically generate UI controls and place them in a asp:Panel control I have under updatePanel. My page is initially almost empty, and I add about 50 new controls upon button click. However, I cannot see the html code generated in the page source. as in, I can see my textfield on the screen but I cannot see the corresponding code in the html source on my browser.

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I have a page (generic handler) on which I want to return the status code 500 to the client to indicate that something is wrong. I do it like this:

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Server Error
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I recently added a Telerik control to an ascx that is included in an aspx page. This page has a "Send email" button, which when clicked will email the user the rendered output of the page. The Telerik control I added requires a ScriptManager, so I added that to the ascx. However, now the email button won't work. I get the following error:

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Page EmailPage = new EmailBasePage();
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I developed a basic web page in MVC 2 for learning the framework, and I am stuck in this situation:

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Feb 24, 2010

In the ASP.NET application that I'm working on, the home/landing page takes around 20-25 seconds to load.

And, that is expectable by everyone, as the application loads huge data, calls multiple services before the first page can be loaded.

I am looking to show some kind of HTML UI to the user while the page loads up.

I tried multiple things but the earliest that something shows up on the page is through Response.Write() in the Page Init and hide that HTML content in jQuery's $(document).ready(). In this case also, something shows up after 60% or the wait time has passed.

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Like I want to check

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I have created a Dynamic Data site against an Entity Framework Model

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I've uploaded a simple Azure website (am testing out authentication) and have found this: (live for next 12 hours or so!)Its supposed to look like this:Problem: How to get the live version looking like the test one on every deploy. After a recompile sometimes it works..

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I have a Java Script popup messae box that is displayed when an application user first displays the web page. Everything works great, but when the popup displays the background of the screen is white, with the popup in front of it. Instead I would like for the popup to be displayed in front of the web page after it has been rendered with all of the controls on it.

<%@ Page Language="C#" codebehind="Default.aspx.cs" inherits="Colso.Site.Default" masterpagefile="~/Master.Master">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
StringBuilder sb = new StringBuilder();
sb.Append("<script language='JavaScript'>");
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<asp:Content id="contentPage" runat="server" contentPlaceHolderRoot">
// Controls not shown because I don't want too many lines

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Jul 20, 2013

How to Disabling the form elements until the page is rendered completely.

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When user cliick on the control before page fully loaded it goes to error page.

Following is the trace.

Execution Error

Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.


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Mar 13, 2010

this works great on my dev machine, but not working on Every time I clicked on the image, the page is just loaded itself instead of going to the previewphoto.aspx page.

<img id="ctl00_ContentPlaceHolder1_ImgPhoto" class="ImgPhoto" onclick="<!'../member/previewphoto.aspx?uid=676971b9-ca9e-463e-8b48-6b5d5b1b01c2&id=22', 'child', 'scrollbars,width=650,height=600--> return false" src="../Photos/../photos/UserLock.png" style="height:100px;width:100px;border-width:0px;" /><br /><br />


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