.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Top 5 Contributors of the Month
MarieAdela
Imran Ghani
Post New Web Links

Delay Postback in Javascript

Posted By:      Posted Date: September 20, 2010    Points: 0   Category :ASP.Net
 

How to Delay Postback in Asp.net Using Javascript: Please Post Some Sample Code


I have a Button Need to Show a Timer Of 10 Seconds and Then Postback. This will happen on Button CLick



So How can i Accomplished that ??




View Complete Post


More Related Resource Links

Client Javascript runs, but then page errors out when clicking on a control that uses postback

  
Using this script on a button click <script language="javascript"> function printdiv(printpage) { var headstr = "<html><head><title></title></head><body>"; var footstr = "</body>"; var newstr = document.all.item(printpage).innerHTML; var oldstr = document.body.innerHTML; document.body.innerHTML = headstr + newstr + footstr; window.print(); document.body.innerHTML = oldstr; return false; } </script> After it is done, I can't click on my calendar control.  I was hoping to add somethign that would force a refresh in the script, but nothing I do works. Any thoughts?  Thanks! 

Gridview attribute changed by javascript is lost on postback

  
I have a gridview control that extends the default gridview.  I have added an attribute called "hiddenSelectedValues" to to the gridview during the "PreRender" event and I have a private variable that points to the value of that attribute. I have some javascript code that modifies the value of this attribute based on the user checking or unchecking checkboxes in the grid.  I have confirmed that the javascript is indeed modifying the value of the "hiddenSelectedValues" attribute by using Firebug to see the change as it happens. However, once a postback occurs, the grid looses the updated value of this attribute and I am unable to reference get the updated value on the server side. How do I keep the value of an attribute changed by javascript on postback?

prevent postback javascript problem

  

i have the following example but i get error on GetPostBackEventReference line

value of tpe ...button cannot be converted to....

second question:where should i put this code? do i need just this code and nothing else

how should i for example delay for 20 seconds??

Dim sb As New System.Text.StringBuilder()
            sb.Append("if (typeof(Page_ClientValidate) == 'function') { ")
            sb.Append("if (Page_ClientValidate() == false) { return false; }} ")
            sb.Append("this.value = 'Please wait...';")
            sb.Append("this.disabled = true;")
            sb.Append(cs.GetPostBackEventReference(btnAddPhotoComment))
            sb.Append(";")
            Me.btnAddPhotoComment.Attributes.Add("onclick", sb.ToString())

 

 


How can i safe value of variables in javascript code in PostBack event?

  

Hi Experts.

I need to define some Boolean variables in my javascript code and use them  when  the any onfocusout methods of controls  is fired. Like this:

<script>

            Var is_ValidateTextBox1 = false;

            Var is_ValidateTextBox2 = false;

            Var is_ValidateTextBox3 = false;

Function focusout_TextBox1()

{ValidateTextBox1 = true; }

</script>

When onfocusout of TextBox1 is fire, I want to set  " is_ValidationTextBox1=true;".  But when the post back is fired from the form, the variable reset to false because the line of defining the "Var is_ValidateTextBox1 = false;" is run again in post back!

Now how can I to solve this problem? How can i safe value of variables in javascript code in PostBack event?

With Regards. Mojtaba


How do you get a textbox/input or a javascript to postback?

  

I am using a Yahoo UI dual slider.  The dual slider changes values based on what you slide.  It uses javascript and sends this value back to a Input type="text" textbox. 


I want to be able to do a automatic postback and call the server function "protected void zoom(object sender, EventArgs e)"  each time the slider value changes.

So what I did was:

<asp:TextBox type="text" id="demo_from"  runat="server"
OnTextChanged="Zoom" AutoPostBack="true">

But the problem is, it WILL not fire the server-side event unless I manually click the textbox and press "ENTER".  Then the event will fire (during debug).


So how can I get the event to auto-fire each time the slider value changes?


thanks!




ASP.Net Postback using javascript for Radio button list

  

Hi There,

My current structure:

1. An asp.net radio-button list with autopostback = true. The radio-button list has 2 items - Yes and No.

2. An asp panel that has 2 textbox.

Current behaviour:

When the user clicks on the radio-button list (i.e. Yes), the panel is made visible.

My clients wants the same functionality without the page refresh (i.e. the postback). I tried looking through a lot of forums and articles and couldn't find the any article that would show an example for drop-down list or radio-button list.

Any help is much appreciated..!

Thanks


dynamic javascript of an .ascx control not updating on client upon async postback

  

I have a confusing state issue. I found a way around it, but I would like to know why this is happening. First of all, I am using .NET 3.5 and that can't change right now (an easy fix may be the fixed ID capabilities of .NET 4.0).

Type csType = this.GetType();
ClientScriptManager cs = Page.ClientScript;
string jScriptBlockName = "SignUpSignInNameAvailabilityScript";
if (!cs.IsClientScriptBlockRegistered(csType, jScriptBlockName))
{   //NOTE: verified code always enters this
    StringBuilder cstext2 = new StringBuilder();
    cstext2.Append("function GetSignUpSignInNameAvailabilityMessage() { var id = '"
          + CreateUserWizardStep1.ContentTemplateContainer.FindControl("iSignUpSignInNameAvailabilityMessage").ClientID
          + "'; alert(id); return id; }");
    cs.RegisterClientScriptBlock(csType, jScriptBlockName, cstext2.ToString(), true);
}

This code is in Page_Load of an ascx. The same control is drawn on two separate postbacks of an UpdatePanel in different places of the page thus giving them different client IDs. The code works correctly on the first refresh of web browser; but after UpdatePanel

Javascript alert vs postback

  

My aim is to not cause a postback if a session var does not equal a certain value when the user clicks the DELETE button. But this causes a postback regardless after the javascript alert is invoked.

I guess I need another logical scenario?

 

 

 


unwanted postback when calling javascript function

  

i am executing a javascript method when a button is pressed, but the page keeps getting posted back.  what am i doing wrong?

this is the javascript portion of the page

<script src="Scripts/soundmanager2-jsmin.js" type="text/javascript"></script>
<%--<script src="Scripts/soundmanager2.js" type="text/javascript"></script>--%>
    <script type="text/javascript">
soundManager.url = '/Scripts/swf/'; // directory where SM2 .SWFs live

// Note that SoundManager will determine and append the appropriate .SWF file to the URL,
// eg. /path/to/sm2-flash-movies/soundmanager2.swf automatically.

// Beta-ish HTML5 audio support (force-enabled for iPad), flash-free sound for Safari + Chrome. Enable if you want to try it!
// soundManager.useHTML5Audio = true;

// do this to skip flash block handling for now. See the flashblock demo when you want to start getting fancy.
soundManager.useFlashBlock = false;

// disable debug mode after development/testing..
 soundManager.debugMode = false;
        
</script>


here is the button code

<button onclick="var aSoundObject=soundManager.createSound({
      id: 'aSound',
      url: '/MP3s/rain.mp3'});aSoundObject.play()">

Stop browser Postback in javascript

  
hi i want to stop the Postback in Browser in javascript .i have used the following Code. if (navigator.appName == "Microsoft Internet Explorer") { document.execCommand('Stop'); } else { Window.Stop(); } but window.Stop(); doesn't work in any browser and document.execCommand('Stop'); works in mozila ,netscape ,safari all but it doesn't work in internet explorer .i have tried a lot .please help me why its is not working with internet Explorer .

Textbox that is enabled by javascript not retained on postback

  

In my page, I need to enable a text box when user click on check box(checked). I have used javascript for this. It works fine but when there is postback for the page, the textbox becomes disabled again although the check box is checked. But the value in textbox still appears. Is there any method to retain the enabled state for text box on postback other than using hidden values?



ASP.NET, HTML, JavaScript Snippet Support (VS 2010 and .NET 4.0 Series)

  
This post covers another useful improvement in VS 2010 - HTML/ASP.NET/JavaScript snippet support. Snippets allow you to be more productive within source view by allowing you to create chunks of code and markup that you can quickly apply and use in your application with a minimum of character typing.

Visual Studio has supported the concept of "snippets" for VB and C# in previous releases - but not for HTML, ASP.NET markup and JavaScript. With VS 2010 we now support snippets for these content types as well.

jQuery $(document).ready() and ASP.NET Ajax asynchronous postback

  
Many call it the ASP.NET jQuery postback problem, but using the technique below should make it no problem anymore. $(document).ready() isn't called after an asynchronous postback. What this means? You lose the functionality that should be executed within $(document).ready() after an UpdatePanel rendered its contents after an asynchronous postback.

call JavaScript - jQuery code from ASP.NET Server-Side

  
jQuery got so close to me lately that I can see myself adding the scripts to my project almost unconsciously. The thing is, jQuery is very useful for me, in almost all situations and it has been a do or die enhancement for all my project since I first put my hands on it.

Of course while using it, you encounter few situations which need a bit of research to solve, mostly when you are trying to combine it with some other technologies like: UpdatePanels and ASP.NET Ajax. For instance there are many situations when I would like to run some jQuery magic based on some decision that I make on the server side.

jQuery live() and ASP.NET Ajax asynchronous postback

  
The issue is that normally $(document).ready() is called when the DOM is ready to be manipulated. But this doens't happen after an ASP.NET Ajax asynch postback occurs.

This means that the initial jQuery bindings won't be automatically available after the asynchronous postback is over. I underline "automatically" here because my last post describes more possibilities, how this issue can be worked around.

call JavaScript - jQuery code from ASP.NET Server-Side

  
jQuery got so close to me lately that I can see myself adding the scripts to my project almost unconsciously. The thing is, jQuery is very useful for me, in almost all situations and it has been a do or die enhancement for all my project since I first put my hands on it.

Of course while using it, you encounter few situations which need a bit of research to solve, mostly when you are trying to combine it with some other technologies like: UpdatePanels and ASP.NET Ajax. For instance there are many situations when I would like to run some jQuery magic based on some decision that I make on the server side

Maintain HTML Radio Button Selection Inside GridView After Postback

  
Long time ago I wrote an article about getting the value of the selected RadioButtons inside the GridView control. The code did not addresssed the postback issue which means that the selected radio button was cleared after the postback occurs.
Categories: 
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend