This is my first encounter with User Controls.
I have a user control that contains a jQuery function called Animate(). I want to call that function from an aspx page that contains the user control. Is that possible?
When I click the button in the following code the function is not fired and no error. What am I missing?
Upload_Animation.ascx
<head>
<script>
function AnimateGif() {
// do some stuff
}
</script>
</head>
<body>User Control</body>
aspx page
<head runat="server">
<uc:UploadAnimation ID="uc1" runat="server"/>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button OnClientClick="AnimateGif();" runat="server" Text="Do stuff" OnClick="btn_Click"/>
</div>
</form>
</body>
web.config
<controls>
<add tagPrefix="uc" src="~/UserControls/Upload_Animation.ascx" tagName="UploadAnimation" />
</controls>
First of all, I cannot see any JQuery code in your source example. As I can see (correct me if I'm wrong), you are trying to call client Javascript function that is declared as Animate() and you are calling as AnimateGif(); Try to correct the name of the calling function to match the declared name.
Related
I have the following Web Form in my ASP.NET Website
<%# Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" ValidateRequest="false" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function SetTextBoxValues() {
TextBox1.value = "Textbox can be set without calling document.getElementById()";
TextBox2.value = "Textbox can be set without calling document.getElementById()";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="TextBox1" runat="server" Height="210px" TextMode="MultiLine" Width="725px"></asp:TextBox>
<br/>
<textarea rows="4" cols="50" id="TextBox2" runat="server" />
<br/>
<button onclick="SetTextBoxValues()">Set Text Box Value</button>
</form>
</body>
</html>
The page works as I can click the button and set values in both TextBox1 and Textbox2. What I don't understand is the way the Textbox value is set in the javascript function.
<script type="text/javascript">
function SetTextBoxValues() {
TextBox1.value = "Textbox can be set without calling document.getElementById()";
TextBox2.value = "Textbox can be set without calling document.getElementById()";
}
Normally we need to use the following JS code:
document.getElementById('<%=txtTextBox.ClientID %>').value = "Some values";
But it looks like we can set the value without the use of document.getElementById(). May I know why it is working this way? Is this a valid way of setting textbox value using javascript?
You use component "runat server" so you should use code behing:
TextBox2.Text = yourvalue;
And create a method server side to manage your inputs.
I think it's like this post:
textarea control, asp.net c#
quoting answer provided as comment from ConnorsFan.
It does work, indeed. I think the explanation is given here:
stackoverflow.com/questions/3434278/…. – ConnorsFan Jun 3 '16 at 12:29
I have written the following script to print a document:
<script type="text/javascript">
function print() {
window.print();
}
$(".printdoc").click(function () {
print();
});
</script>
and I am invoking the above script by an <asp:button../> as follows:
<asp:Button ID="btnPrint" runat="server" Text="Print" CssClass="printdoc"/>
Every time I click on the button it loads the page again but the query doesn't seem to work.
When I checked the resources , I found the following console error:
Uncaught ReferenceError: $ is not defined
print may collide with the built in print function. So let's call it printPage.
<script type="text/javascript">
function printPage() {
window.print();
}
</script>
In additional to Rahul's solution for referencing jQuery, by default asp:Button will postback to the server when clicked. So switch to a regular button.
<button type="button" onclick="printPage()" runat="server">Print</button>
You can leave the runat attribute off if you want, it's only necessary if you want to refer to it from the code behind.
If you really wanna use the asp:Button, you can do this:
<asp:Button ID="btnPrint" runat="server" Text="Print" OnClientClick="printPage(); return false;"/>
The return false; will prevent the postback. But I don't see much point in using asp:Button for client side things.
You need to put the reference of Jquery in your code:
<script language="JavaScript" type="text/javascript" src="/js/jquery-1.2.6.min.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/jquery-ui-personalized-1.5.2.packed.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/sprinkle.js"></script>
As mason has already answered the rest, you need to create a regular button instead of asp:button as asp:button will postback to the server everytime it will be clicked.
i have a very simple asp.net code but my code doesnt make any sense and after run there would be nothing happen .
I'm using external java script file and trying to run my Script from my asp page and in the button object .
Its my asp code :
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="test.aspx.cs" Inherits="WebApplication2.test" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head ">
<title></title>
<script src="Script/Script_Validate.js" type="text/javascript"></script>
</head>
<body>
<form id="form1" runat="server" >
<div>
<asp:Button runat="server" Text="aaaaaa" OnClientClick="valid();" />
</div>
</form>
</body>
</html>
Its my JS's file content :
function valid()
{
alert("Hello! I am an alert box!!");
}
please help .
Your code works for me. Do you definitely have a "Script" folder? Is the name of the file correct? Do you have JavaScript enabled on your browser?
The only problem I can see with your code is your head tag has a single quotation mark ("). Maybe this should be runat="server"?
i am learning javascript client side scripting language and i am using js in ASP.. i dont know when i compile the code, it shows
COMPILATION ERROR:Compiler Error
Message: CS1061: 'ASP.default_aspx'
does not contain a definition for
'popup' and no extension method
'popup' accepting a first argument of
type 'ASP.default_aspx' could be found
(are you missing a using directive or
an assembly reference?)
here is my code :
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WEB_test_app._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>Shuraat Web ki</title>
<script type ="text/javascript">
function popup()
{
alert("popup!!");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick ="popup()"/>
<script type ="text/javascript">
document.write("Abid");
</script>
</div>
</form>
</body>
</html>
You're confusing client-side and server-side events. The popup() function is written in Javascript and runs on the client, but OnClick is a server-side event, so its handler runs on the server and has to be written in the language of your page (C#). popup() has no meaning in that context.
You can use the ClientClick event in order to handle the button click client-side. Note that you probably should return false from the handler in order to avoid a postback to the server:
<asp:Button ID="Button1" runat="server" Text="Button"
OnClientClick ="popup(); return false;" />
You have to assign popup() to the event OnClientClick instead of Click like this:
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick ="popup()"/>
The reasoning behind your problem is that when the run-time saw OnClick it tried to attatch that event with a C#/VB.Net (Code-Behind) method (which obviously does not exist) and we solved that by attaching the event OnClientClick to your Javascript method.
OnClick - is click handler on server side. If you want to call javascript function, use OnClientClick.
I've a specific requirement of rendering Javascript onto a master page of an asp.net site. There are two specific requirements of it:
1) The position - It should be rendered at the very end of the page just before BODY tag
2) Control - Render it only when requested.
I solved #2 by creating a web-part which will render the javascript only when its placed on the page. But I could not achieve #1 since the web part doesn't give me control over where to render the javascript inside body tag.
Did anyone solve this problem before?
Please advice.
Thanks
Sachit
Try using ClientScript.RegisterStartupScript, it injects the script right above the </body> tag.
RenderControl is the last method to return in MasterPage Event Lifecycle that you can override. My guess would be to put it there.
If you are using Master Page, then why not put a content place holder just before the end body tag? The content pages should render their JavaScript in that particular place holder.
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<asp:ContentPlaceHolder ID="headerContent" runat="server"/>
</head>
<body>
<form id="mainForm" runat="server">
<asp:ContentPlaceHolder ID="mainContent" runat="server" />
<asp:ContentPlaceHolder ID="footerContent" runat="server" />
</form>
<asp:ContentPlaceHolder ID="footerJsContent" runat="server"/>
</body>
</html>
Content pages should render their JavaScript inside the footerJsContent place holder.