ASP.NET

4-Apr-07 3:01

I'm trying to add a small (tiny!) javascript function to my ASP project.

I'm using 2.0 and C#. My site uses Master pages so I don't think I can directly edit the element.

The following shows my master page, to which I'm trying to add a javascript function - just for testing at the moment.

2 questions -
1) The current code gives a CS0246 error - "The type or namespace name 'function' could not be found (are you missing a using directive or an assembly reference?)" for both 'var' and 'function. What do I need in order to declare functions this way?
2) Given that I can't edit the element, how do I actually call the function? Do I call it from within the Page_Load event?

Many thanks,
Alice

<%@ Master Language="C#"%>

var str = "This is the test string.";
function myFunction()
{
str+=" The string was changed by myFunction. ";
return (str);
}

protected void Page_Load(object sender, EventArgs e)
{
}

<title>Page title

kubben4-Apr-07 3:11

kubben

4-Apr-07 3:11

I think the better question is what exactly are you trying to do. This is some sample code just to try to get some javascript working. What is your real question? To call a javascript function you can do it in the page load. You have to register the javascript like this:

Type cstype = this.GetType();
        
    // Get a ClientScriptManager reference from the Page class.
    ClientScriptManager cs = Page.ClientScript;

    // Check to see if the startup script is already registered.
    if (!cs.IsStartupScriptRegistered(cstype, "myFunc"))
    {
      cs.RegisterStartupScript(cstype, "myFunc", "myFunction();", true);
    }

Hope that helps.
Ben

Alice@mywonderland4-Apr-07 3:43

4-Apr-07 3:43

kubben wrote:
I think the better question is what exactly are you trying to do.

The real use will be to declare a couple of functions to allow me to open and close a popup window. I have users log in on one page, from where I want to launch the popup which runs a seperate chatbot application. Users then play around in other pages until they log out. When they hit the log out button I want to be able to close the chatbot. I'm thinking that because all these pages share the same master, if I declare the open and close popup window functions in the master page, then I'll be able to call chatbotwindow.close() even though chatbotwindow was defined (by chatbotwindow = window.open() ) on a separate page.

I'm 100% new to javascript, and not that experienced with ASP.NET, so I'm probably making this harder than it needs to be but I'm finding it really hard to integrate the javascript into my code (possibly because I've used Master pages and code behind, which seem to have hindered things) Frown | :-(

Thanks for your comments!
Alice

Not Active4-Apr-07 4:39

4-Apr-07 4:39

A better implementation would be to ceate a javascript library and include it in the pages.

MasterPages and code behind aren't the problem. If they are hindering things for you, you need to do more research on usage.

only two letters away from being an asset

Not Active4-Apr-07 3:46

4-Apr-07 3:46

kubben wrote:
To call a javascript function you can do it in the page load.

This doesn't "call" the javascript. It places the script at the top (or at least near the top) of the rendered output.

only two letters away from being an asset

kubben4-Apr-07 3:48

kubben

4-Apr-07 3:48

Yes that is true, I didn't word my response carefully. Thanks for making it clear to her what is going on.

Ben

Not Active4-Apr-07 3:42

4-Apr-07 3:42

Maybe a typo but you are missing the closing </script>

Why can't you modify the body tag? <body onLoad="myFunction" >

only two letters away from being an asset

Alice@mywonderland4-Apr-07 4:17

4-Apr-07 4:17

Mark Nischalke wrote:
Why can't you modify the body tag? <body onLoad="myFunction" >

It seems that because I have a Master page which includes a ContentPlaceHolder I can't add text... I get the following error if I do:
"Validation (XHTML 1.0 Transitional): Text is not allowed between the opening and closing tags for element body'."

If I type onLoad="myFunction" into the it shows the text 'onload' at the top of the rendered page... so what am I doing wrong here?

Thanks,
A

Not Active4-Apr-07 4:34

4-Apr-07 4:34

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>

<!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>Untitled Page</title>
<script language="javascript" type="text/javascript">
function myFunction()
{
alert("Entered myFunction");
}
</script>
</head>
<body onload="myFunction()">
<form id="form1" runat="server">
<div>
<asp:contentplaceholder id="ContentPlaceHolder1" runat="server">
</asp:contentplaceholder>
</div>
</form>
</body>
</html>

only two letters away from being an asset

Alice@mywonderland4-Apr-07 5:21

4-Apr-07 5:21

Mark Nischalke wrote:
</blockquote>

Thanks very much Mark - this is so close, but back to an error I've seen before (it turns out I can't have been so far from getting it already!)

With the code as you gave it, I get the folloing error "Cannot use 'javascript' because another language has been specified earlier in this page (or was implied from a CodeFile attribute)."

If I remove language="javascript" line, I'm back to getting the "The type or namespace name 'function' could not be found (are you missing a using directive or an assembly reference?)" error.

Any ideas?

(You can have your two crucial letters, you are an asset )

Not Active4-Apr-07 5:27

4-Apr-07 5:27

And do you have another language specified? Perhaps you code post the snippet that is giving you problems.

only two letters away from being an asset

Alice@mywonderland4-Apr-07 5:51

4-Apr-07 5:51

Mark Nischalke wrote:
And do you have another language specified? Perhaps you code post the snippet that is giving you problems.

Certainly

My master page is this:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="~/LoginMaster.master.cs" Inherits="LoginMaster" %>

function myFunction()
{
alert("Entered myFunction");
}

protected void Page_Load(object sender, EventArgs e)
{

}

<title>Page title

<asp:contentplaceholder id="ContentPlaceHolder1" runat="server">

And the Code File (LoginMaster.master.cs) is just this:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Login : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
}

So I don't think I'm intentionally specifying a language anywhere, other than the Master Language in the page declaration - but that's standard isn't it(?), and only as you had it in the suggested code.

Thanks again!
A

Not Active4-Apr-07 6:12

4-Apr-07 6:12

You do not need to include the Page_Load event in the script block, it is already in the code behind. By doing so you are trying to use two languages in the same block, which is where the build error is coming from. If you need to include server-side script, it needs to be in a seperate script block.

Also remove the runat=server from the script block for javascript.

only two letters away from being an asset