Javascript Update Before Page Loads?
May 29, 2010
I'm trying to update values from a xml file into textboxes. I have this javascript being called in the Page_Load event
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "Script", sb.ToString(), true);
I click the continue button which does a post back but the values are not updated until I refresh the page again which makes me think the js isn't being run until after the page is returned. I'm wondering how to have the values updated when the page is refreshed after the button postback.
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Jun 3, 2010
In my global.asax file for my ASP.net project, I am checking for certain conditions. When those conditions are met, I want to automatically execute javascript code when the page runs.
This is my code:
if condition Then
Response.Write(" < script type=""text/javascript"" > ")
Response.Write(" // Javascript code to do stuff ")
Response.Write(" < /script > ")
End If
While this appears to work to execute the Javascript code, I don't think it's a best practice because this code will preceed all of the HTML of the page that gets loaded.
What is the best way of programmatically tacking on some extra Javascript code to be run when my page loads?
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Feb 18, 2011
I want to run a javascript function when the page loads. But as my page derives from the master page there is no form . The is my aspx file
<%@ Page Title="" Language="VB" MasterPageFile="~/Site.Master" AutoEventWireup="false"
CodeFile="test3.aspx.vb" Inherits="test3" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="Server">
<script language="javascript">
var m_Names = new Array();
function LoadArray() {
PageMethods.Load_Array(onSucceeded, onFailed);
}
function onSucceeded(result, userContext, methodName) {
m_Names = result;
}
function onFailed(error, userContext, methodName) {
alert("An error occurred")
}
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="Server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
</asp:ScriptManager>
<asp:TextBox ID="txt_model_code" runat="server"></asp:TextBox><br />
<br />
<input type="button" value="db Function" /><br />
</asp:Content>
I want to run the LoadArray() function initialy when the page loads. This function is calling a pagemethod given in aspx.vb code file..
Partial Class test3
Inherits System.Web.UI.Page
<System.Web.Services.WebMethod()>
Public Shared Function Load_Array() As String()
Dim Model_Name_old As String()()
Dim mod_code As String()
Dim mod_name As String()
Dim cod_upper As Integer
//calling webservice that retunrs a jagged array
Dim ins As New localhost_insert_model.dbModel
Model_Name_old = ins.get_Model_Name("A")
mod_code = Model_Name_old(0)
mod_name = Model_Name_old(1)
Return mod_name
End Function
End Class
So how can i load the javascrip LoadArray() function onPageLoad in this scenario?
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Apr 19, 2010
I don't need to run the function every time the page loads!!
But, I would like to have the control when the function is to be called.
The only way I thought of is calling my function with OnLoad in the body tag and having a hidden field to be checked and then run the script accordingly.
e.g:
<body onload="ScrollToView();">
Is there a better way? For example, running the function from Page_InitComplete handler?
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Mar 24, 2010
we're looking to compress our gargantuan JavaScript files with GZip to speed up the page loads of our site. I know this can be done through IIS, but I can't seem to find a simple step-by-step guide on how to implement it.We're running IIS7.5 on Windows Server 2008 R2.
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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
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Dec 18, 2010
I am creating a browsergame in ASP.NET (using AJAX, jQuery, ect. - NO Flash). In this game I need to play some sound files. Right now I have those files as .WAV, but if the solution can play .MP3, that is preferred.I have several events during the game which need sounds: You hit the monster, you die, you level up, ect. The page is based upon update panels, which means I will have to add several sounds (and replay them at specific events) without a postback. As some of the sounds is replayed every 3-5th second and others are played way more rare, it has to be efficient to this requirement.What would be the best and most efficient solution to solve this? :-)
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Jan 24, 2010
As per Yahoo's guidelines for performance of web sites , javascripts should be combined in one to avoid extra http request , as i saw in YSlow asp.net loads 3 to 4 scripts one for MicrosoftAjax.js , one for microsoft MicrosoftAjaxForms.js & some other 2 which may tondle postbacks & client side validations , I want these 4 js to be in one.
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Feb 9, 2011
We have a function that changes the iframe height at the window.onload event so we can adjust it to the page contents. The problem is that after clicking in an asp:menu the height its restored to its default and the window.onload event doesnt fire...so we need the event that would fire in subsequent loads (tried window.unload but didnt trigger)
The resize function cant be called on the asp:menu click because the window wouldnt have finished loading so the height calculation would fail...
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Mar 16, 2011
I am trying to fire a Javascript call when an ASP.net user control to an aspx page.
The Web site allows users to add user controls to a page (similar to adding a widget etc to a page like google widgets). But when the control is added the javascript does not fire, only if the page is refreshed will it fire the javascript. IF the next time the website is accessd and the controlis still there the javascript fires too.Do I need to use the RegisterClientScript method to register the call (setAutoTimer()) on the control load or OnPreRender event.In the User control I have this at the start of the ascx file:
[code]...
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Feb 5, 2010
I am developing a webapplication with maser page. there i have a lebel, control. i need to update its value from the content page, and only by the javadscript.
i am doing:
[code]....
The second question is, how could i initialize(to NULL) my master page value from the content page .
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Mar 10, 2010
The problem with my web application is when ever i load the home page - The master page as well as content page loads ---This seems fine but when i navigate thorugh the website which have the same Master page but diffrent content page .... the master page loads again. What i want to do is ..I want to keep the master page intact and only the content page loads. How can I accomplish it..
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Feb 11, 2011
i have seen many site where individual web parts load with busy icon when page loads. without using web parts how can develop a page where individual section will load with busy icon when page loads.
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Jun 3, 2010
I have a master page 'Master1' and i have used a content place holder 'content1' and loads pages 'Page1' and 'page2' in the 'content1'. Is there any way to identify which page is loaded to the content place holder whether it is 'Page1' or 'Page2' dynamically.
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Jan 7, 2010
I have the following code which should update a label to say "wait..", then run a function, and then update the label again to say it has completed:
<asp:Button ID="Button1" runat="server" Text="Upload"
onclientclick="document.getElementById('errorMessage').innerText='Wait...';"
onclick="Button1_Click" />
This works fine in IE, but not in Firefox.
When I run it in Firefox the label does not change until the process completes.
Is there a way to force the JavaScript to update the page before running the C# function?
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Apr 3, 2010
I have this div inside a repeater, where i set the class, onmouseover and onmouseout properties from code behind:
<div id="Div1" runat="server" class="<%# getClassProduct(Container.ItemIndex) %>" onmouseover="<%# getClassProductOver(Container.ItemIndex) %>" onmouseout="<%# getClassProductOut(Container.ItemIndex) %>">
codebehind:
public String getClassProduct(Object index)
{
int indexItem = Int32.Parse(index.ToString());
if (indexItem == 3)
return "produs_box produs_box_wrap overitem lastbox";
[Code]....
This code is fired initially, and after the page is rendered, it is called again, and executed again due to that js...
UPDATE: happens only in Firefox. On chrome, it works fine...
"Solution": deactivated YSlow....just "horrible".
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Aug 23, 2010
have an ASP.Net 2.0 (VB) application which connects (SQL Authentication) to SQL Server 2008. I publish the application to our intranet. The start page is frmMain.aspx. I RDP to a "neutral" PC (one like our users have) and the site loads fine the first time in. The users cannot bring up this application, however (it does not load--times out). They have been able to run this application before from this same intranet location and have not had problems. I have re-published the site, but this behavior continues.
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Jan 27, 2012
What would cause a single webpage to load slowly? I have javascript within the <head> element. The html consists of 2 <div> elements and within these <div> elements are a bunch of <table> elements and that's it.
The functionality of this site is such that each <table> element contains data that during the "onload" event, these <table> elements are hidden. Each <table> elements is controlled by an HTML menu (the menu itself is an html table). When a menu item is clicked, it will either display or hide the <table> element depending on whether it is already displayed or hidden.
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Mar 10, 2010
I have a created a web portal in multi-language. I put all the pages related to "english-language" in one folder (/english) and "arabic-language" in one folder. I didn't have a default.aspx in my root folder(wwwroot), its in /english folder. There is no
index.htm or default.aspx page in my root folder.I am very confused how can i redirect the default.apage when page loads. The default pages is stored in /english folder.
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Jan 5, 2010
Does anyone have any problems with Page_Load being executed twice in Google Chrome?
It's a short question, i do not know what else to explain...
I have a simple asp.net page and in Firefox and IE all it's working fine.
But in Chrome the Page_Load is fired twice...
Later EDIT:
- what is strange is that i have 4 repeaters... binded with random values. The random methods are twice fired (because of page loaded twice) but the repeaters takes the INITIALLY values...so, the 2nd post back is somehow raised after the rendering step.
3rd edit: It happens ONLY at the refresh!
Solution (in my case): There was an empty img src, and that was the cause
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Apr 4, 2011
The gridview is not displaying when the page load even though I have bind the gridview with the datasource.... below is the code..
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DSF_View_ChangeRequest.aspx.cs" Inherits="DSF_View_ChangeRequest" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[code]...
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Feb 24, 2011
ASP.Net web forms, .NET 2.0
I have a dilemma. I have an aspx page that has a custom control:
<def:CustomControl ID="customID" runat="server" />
The custom control can be added multiple times to the ASPX page if certain criteria is met:
<asp:Repeater runat="server" ID="options" OnItemDataBound="options_OnItemDataBound">
<HeaderTemplate>
<table border="0" cellpadding="0" cellspacing="0" width="100%">[code]...
In the code behind of the aspx page, I wanted to append a event (OnSelectedItemChange) to the dropdown control that isn't actually on the ASPX page (yet). However, when I try to do something like the following in the code behind:
foreach(Control eachControl in customID.Controls) {
if (eachControl.HasControls) {
Control DdControl = eachControl.FindControl("optionValues"); //always null
[code]....
But All that eachControl has is a repeater, and it shows its childcontrol count as 0. So when it get to the FindControl method, it always returns null.
QUESTION.So what I am trying to do is add an event (OnSelectedItemChange) to the dropdownlist control inside the repeater (which is a custom control that gets added to the page if criteria is met). When a selection is made in the drop down, I want it to trigger the Event method.
How can I either: A) Find a way to add the event if the dropdownlist control exists on the page?
OR
B) A way to be able to call a method in the code behind and pass the selections from all the drop down lists (since the custom control could be added more than once creating multiple drop downs?
NOTE I don't have the code in front of me, so if I have something syntactically incorrect, please overlook. I also know that ID's are unique, so this is also assumed to be a problem with my logic. When it renders these, the ID's might be mangled by the asp name convention which I would assume I have to find a way around.
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Jan 5, 2011
Here's is my code I just added to my DLL (using it in my website):
[Code]....
Then, in my page_load event, I just have:
[Code]....
I've added a reference to the dll and I've imported it in my page - the only other method (sub) works just fine, but with this, I get an error:Method not found: 'System.String HSIR_Common.Main.StripCurrentUser(System.String)'.
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Nov 1, 2010
I have a few pages on my website that contain a gridview that gets bound on the page load event. Most of the time while the page is loading, about 5 or 6 rows of the gridview turn into a black box. Usually the box disappears after the page is fully loaded, but sometimes it doesn't and you have to highlight it with the mouse to get rid of it. This happens on more than one computer and I'm not sure how to fix it.
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Mar 19, 2011
i dunno my page will load twice. when i debug, i found that in second load also is page.ispostback = false i really can't found the reason why my page will load twice without my order, and IsPostBack = False anyone got such experience b4
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