This might be a silly question ..I m New to Client Side technology.. But i just wanted to know .. does Button_Click() wont Fire with $().ready function simply ?...
this is my Code
<%# Page Language="C#" CodeBehind="Default.aspx.cs" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<script type="text/javascript" src="http://code.jquery.com/Javascript/jquery-1.4.2.min.js"></script>
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
}
</script>
<script type="text/javascript" language="javascript">
$().ready(){ alert(' '); }
----another try
$(document).ready()
---another try
function pageLoad() { alert(' '); }
--another try
$(document).ready(function() {
alert("Document is Ready Now!");
});
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click"
/>
</div>
</form>
</body>
</html>
I tested it on FireBug ..$().ready wont fire before or After Button_Click() ..DO i Need to use Script Manager.. I have seen some suggestion ..
I Couldnt able to find something relevant ..PLease Suggest
jQuery document ready statement like this.
$(document).ready(function() {
alert("Document is Ready Now!");
});
use this ....kindly check have attach jquery library in your project or not.
Jquery
$(document).ready(function() {
$('#Button1').click(function(){
alert("Document is Ready Now!");
});
});
demo
Try $(document).ready()
This function will be executed before any other function in script.
why you use bellow code when use jquery use the second code
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
}
</script>
$(document).ready(function() {
$('#Button1').click(function(){
alert("this is alert!");
});
});
There is a problem with the jQuery CDN that you're using.
Hit this link http://code.jquery.com/Javascript/jquery-1.4.2.min.js. It will show up a 404 Not Found error.
Try other CDN's.
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
Hope it helps.
UPDATE
I think you've got the wrong path to the jquery.
It should be
http://code.jquery.com/jquery-1.4.2.min.js and not http://code.jquery.com/Javascript/jquery-1.4.2.min.js. Observe the difference.
The link point to Javascript directory which doesn't exist
Related
I've just followed this very basic code on Youtube and it works perfectly. However, I go to try the same code on my asp.net webforms website, have tried it in both chrome and edge, and javascript doesn't seem to want to run. Can anyone please tell me where I am going wrong? I am using Visual Studio 2015. I must have a setting turned off somewhere or something as it does not make any sense to me why a basic alert is failing to run.
Here is the basic code:
<%# Page Language="C#" AutoEventWireup="true" CodeFile="webform.aspx.cs" Inherits="webform" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function pleaseWork(){
alert("this is running");
};
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" Text="Button"/>
</form>
</body>
</html>
protected void Button1_Click(object sender, EventArgs e)
{
ScriptManager.RegisterClientScriptBlock(this, GetType(), "mykey", "pleaseWork();", true);
}
}
If you just need this to execute on the client, then you probably don't need any server side controls for it. So the head section doesn't need to run on the server.
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="pleaseWork();"/>
OR
<input type="button" value="Button2" onclick ="pleaseWork();" />
Your button is missing an onclick attribute, so Button1_Click is not being called.
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
I'm trying to use function pageLoad() (asp.net related JS event)
I have one in the masterpage, and one in a different page.
For some reason they don't want to be friends... only one is called.
When I cancel one, the other one is called so I don't see a problem there...
Any idea?
Master page:
<%# Master Language="C#" AutoEventWireup="true" CodeBehind="....." Inherits="......." %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<script>
function pageLoad() {
alert('masterpage load');
CallStyledArrowSelect();
}
</script>
//more irrelevant code
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
And in the content page:
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
<script>
function pageLoad(){
alert('hi i'm not working');
}
//more code...
OK,
thanks to andrey.shedko for the link,
Apparently it is not possible to have 2 pageLoad functions - one in the masterpage and one in the content page.
The solution suggested there is making another function on the content page and call it if it exist:
function pageLoad() {
// Master pageLoad() code.
// If function contentPageLoad exists, execute it.
if(typeof contentPageLoad == 'function')
contentPageLoad();
}
I have a small problem in Webforms. I'm trying to disable the submit button on submit, to prevent double posts.
The problem is, that the onclick method in codebehind is not getting called if the submit button is disabled during postback. Postback still occurs, but the buttons onclick method doesn't get called.
Is there a way to get around this?
Here a small demo of the problem:
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="WebApplication2._default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="Scripts/jquery-2.0.3.min.js"></script>
<script>
function disableButton() {
//$('#<%=btn.ClientID%>').attr('disabled', 'diabled');
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Literal runat="server" ID="ltrDate" />
<asp:Button runat="server" ID="btn" OnClientClick="disableButton();" Text="Hit me!" OnClick="Unnamed_Click" />
</div>
</form>
</body>
</html>
codebehind:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication2
{
public partial class _default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Unnamed_Click(object sender, EventArgs e)
{
Thread.Sleep(1000);
ltrDate.Text = DateTime.Now.ToString();
}
}
}
If this code is run, it works fine, but if the // is removed from the javascript method, the buttons onclick method is not being called anymore. (postback still occurs fine)
/Martin
Update:
It seems to be an old issue..
I never got this to work, because when the button is disabled client-side, its information is no longer posted back to the server, so its server-side click event does not fire. I suspect that's the behavior you're seeing.
If you do manage to make this work, I'd love to know how.
Ian Olsen
Wednesday, June 09, 2004
A more simple solution:
<asp:Button ID="btnFind" runat="server" Text="Find"
OnClientClick="if(this.alreadClicked == true) {this.disabled = true;
this.value = 'Wait...';} else {this.alreadClicked = true;}" EnableViewState=false
</asp:Button>
You disable the button anyway and also give the user a feedback "Wait...", but must use EnableViewState=false so the button reset to it's original state when the page refresh.
Ok.. I found the answer :)
The trick is to use Page.GetPostBackEventReference(btn). The method will insert a call to dopostback, and the right events will be fired.
The easy solution is to just insert that line after the javascript line that disables the button. Then it'll work, but if you have client side validation, that wont work. (Or, it'll work, but the submit button will be disabled if the user forgot to enter the required information).
Here's the demo from my original question edited to use client validation, and with the disabeling of the submit button on postback:
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="WebApplication2._default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="Scripts/jquery-2.0.3.min.js"></script>
<script>
$(function () {
if (typeof ValidatorUpdateDisplay != 'undefined') {
var originalValidatorUpdateDisplay = ValidatorUpdateDisplay;
ValidatorUpdateDisplay = function (val) {
originalValidatorUpdateDisplay(val);
//Bind();
if (val.isvalid) {
$('#<%=btn.ClientID%>').attr('disabled', 'disabled');
<%=Page.GetPostBackEventReference(btn)%>
}
}
}
});
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager runat="server" />
<div>
<asp:TextBox runat="server" ID="txtFirstname" />
<asp:RequiredFieldValidator runat="server" ControlToValidate="txtFirstname" Display="Dynamic" EnableClientScript="true" ErrorMessage="Please enter your firstname" />
<br />
<asp:Literal runat="server" ID="ltrDate" />
<br />
<asp:Button runat="server" ID="btn" Text="Hit me!" OnClick="Unnamed_Click" />
</div>
</form>
</body>
</html>
Codebehind:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication2
{
public partial class _default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Unnamed_Click(object sender, EventArgs e)
{
Thread.Sleep(1000);
ltrDate.Text = DateTime.Now.ToString();
}
}
}
Whenever the jQuery is triggered I recieve the error 500 Internal Server Error, does anyone have any ideas why the code below might be causing this?
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script src="../meta/js/jquery-1.7.2.js"></script>
<script>
$(document).ready(function() {
$('#form1').submit(function(e){
e.preventDefault();
alert('I clicked it');
});
});
</script>
</head>
<body>
<form name="form1" method="post">
<button id="button">grab user data</button>
<select></select>
</form>
</body>
</html>
I'm gonna guess its because of this variable:
<%=button.ClientID %>
There is nothing else (shown) that would signify anything else that would throw an error.
Can you clarify what you mean by 'jQuery is triggered'? Does that mean upon 'click' ?
Or just by loading this page (I assumed the later)
I would guess that it's giving the error with this line:
$('#<%=button.ClientID %>')
Hard code a value instead and test it:
$('#buttonID')
In order to achieve what you want this will do the job:
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script>
$(document).ready(function() {
$('#myButton').on('click',function(){
alert("i clicked it");
});
});
</script>
</head>
<body>
<button id="myButton">Click Me!</button>
</body>
</html>
$(document).ready is used to execute your code just after your page is rendered, then $('myButton') will get any element with an id "myButton", then you will use the method "on" to attach any event you want, in this case you will want to choose the "click" event, then you should give an anonymous function where you will put the code you would like to execute on that action.
Your button is inside a tag with action="". This will cause a postback to "/". If your server doesn't handle this correctly, you will get an internal server error.
if you only want the alert to show, you can call preventDefault on the jQuery event object. Se example below:
$(document).ready(function() {
$('#<%=button.ClientID %>').click( function(e) {
e.preventDefault();
alert("i clicked it");
});
});
EDIT:
Forget what i wrote above. It doesn't work. Instead, use the submit event on the form. Like this:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script src="#{'/public/javascripts/jquery-1.6.4.min.js'}" type="text/javascript" charset="${_response_encoding}"></script>
<script>
$(document).ready(function() {
$('#form1').submit(function(e){
e.preventDefault();
alert('I clicked it');
});
});
</script>
</head>
<body>
<form id="form1" method="post" action="">
<button id="button">grab user data</button>
<select></select>
</form>
</body>
</html>
you are attaching the submit event to #form1 but your form doesn't have an id, only a name. You must select the form by name, $("form[name='form1']") or give it an id of id="form1".
So, I have an .aspx webpage as follows:
..
<form id="frm" runat="server">
<asp:FileUpload runat="server" id="fileupload" onchange="browsed()" />
<asp:Button runat="server" OnClick="Upload_Click" id="uploadbutton" class="uploadbutton" Text="start upload" Enabled="false" />
<div id="nfo" style="display: none">
blabla
</div>
</form>
..
Now, as you can guess correctly, user chooses file to upload, clicks #uploadbutton and, voila, Upload_Click is called after the postback.
Then, I want to show div #nfo with some jQuery effects during the upload. To do this, I write:
$(function() {
$('.uploadbutton').click(function() {
$('#nfo').slideDown().show("fast");
})
})
and everything works just fine, until the user starts browsing in IE...
First of all, in IE, user has to click #uploadbutton twice - first time to display #nfo, second time, for some reason, to initiate postback.
Secondly, after the postback, Upload_Click's this.fileupload.HasFile shows false.
FF and Chrome works quite well though.
As far, as I can understand this - in IE jQuery's function prevents something important for asp:FileUpload from happening and stops the postback. Though, on the second click it does initiate the postback, but still with no info for asp:FileUpload's Upload_Click.
Any help?
Update:
followed #joelt'd advice. turned out, there was some different problem, never thought it could be of importance, so I didn't provide source code for that part =(
see localizing <asp:FileUpload>. IE problem
<%# Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("#Button1").click(function() {
$("#progress").show();
});
});
</script>
</head>
<body>
<form runat="server">
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Button" />
<div id="progress" style="display:none; background-color:Red;">test</div>
</form>
</body>
</html>
This works fine for me in FF and IE7, except in IE, the progress indicator doesn't really give you anything because of how it's rendering, I suppose. I would say the biggest difference between our code is the "onchange=browsed()" function. It's possible that's not getting called until you click the button? In any case, I would start with a stripped down page like this, and start adding in other elements you have until it breaks.
try this:
<asp:Button runat="server" OnClick="Upload_Click" id="uploadbutton"
class="uploadbutton" Text="start upload" Enabled="false"
OnClientClick="return myFunction();"/>
<script type="text/javascript">
function myFunction(){
$('#nfo').slideDown().show("fast");
return true;//THIS WILL FIRE POSTBACK EVENT
//return false;//THIS WILL STOP POSTBACK EVENT, WHICH YOU MAY WANT IF THERE
//IS NO FILE SELECTED
}
</script>