Run Java in code behind using ClientScript.RegisterStartupScript

**gem1204** · Jan 1st, 2010, 05:20 PM

Hello every one,
I know how to register a client script that is on my web page, but I would like to know how to register my script when the script is in another file. Does anyone know how to register a file containing java script file. This is my code for calling the function when it's in the page.

HTML Code:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>
<!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">
<script language="javascript" type="text/javascript"  >
    function openNewWin(url)
           {
        var x = new Object; 
        x = window.open(url, 'mynewwin', 'width=600,height=600,toolbar=1');
    }
 </script>
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
          <asp:Button ID="btnOpenPop" runat="server" Text="Open Pop"  />
    </div>
    </form>
</body>
</html>

This is the code behind for my button.

Code:

Protected Sub btnOpenPop_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnOpenPop.Click
        Dim url As String = "http://www.yahoo.com"
        ClientScript.RegisterStartupScript(Me.GetType(), "OpenWin", "<script>openNewWin('" & url & "')</script>")
        'How do I register script in an external file called JScript.js
    End Sub

I have the exact same function in a javascript file (Jscript.js) in the root directory. I know I need the src property to idenify the file, but how do I register the whole script file and call the function?

This is the code in my javascript file

Code:

//// Jscript.js /////
function openNewWin(url) {
    var x = new Object;
    x = window.open(url, 'mynewwin', 'width=600,height=600,toolbar=1');
}

If anyone can help me I would appreciate it.

Thanks

**motil** · Jan 2nd, 2010, 02:12 AM

hi you can do it this way:

Code:

  Page.ClientScript.RegisterClientScriptInclude("uniqueID",
                          ResolveClientUrl("Jscript.js"));

you must give each file unique id, if you don't only the last file will be register.

**gem1204** · Jan 2nd, 2010, 09:41 AM

Thanks!
I got everything to work using RegisterClientScriptInclude but the only way I could get it to work was calling RegisterStartupScript again when I wanted to call the function. It works great but I wanted to make sure I was doing it correctly or if there was a better way to call my function without using RegisterStartupScript. Is there a better way to do this than the way I'm dooing it?
Thanks
GEM

Javascript code:

Code:

//// Jscript.js /////
function openNewWin2(url) {
    var x = new Object;
    x = window.open(url, 'mynewwin', 'width=600,height=600,toolbar=1');
}

HTML Code:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>
<!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">
<script language="javascript" type="text/javascript" src="JScript.js"  ></script>
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
          <asp:Button ID="btnOpenPop" runat="server" Text="Open Pop"  />
    </div>
    </form>
</body>
</html>

Code:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            Page.ClientScript.RegisterClientScriptInclude("Java1", ResolveClientUrl("Jscript.js"))
        End If
    End Sub

    Protected Sub btnOpenPop_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnOpenPop.Click
        Dim url As String = "http://www.yahoo.com"
        ClientScript.RegisterStartupScript(Me.GetType(), "OpenWin", "<script>openNewWin2('" & url & "')</script>")
        '\\is there a better way to call my function than using RegisterStartupScript - this seem rendundant
    End Sub

**gep13** · Jan 3rd, 2010, 07:08 AM

Hey,

Is there a reason why you are "including" the JavaScript code in your Server Side code? Why not attach it directly in a link tag in the head of your page? Once you have done that, you can simply call RegisterStartupScript in the knowledge that is js file is already available on the client.

Gary

**gem1204** · Jan 3rd, 2010, 07:49 AM

I guess that was my other question. The way I did it worked but it seemed redunant. I had the java script in the page, then 2 register scripts in the code behind.
I had no reason to put the javascript in the page other than to idenity the javascript file. I experimented trying several different ways and this is the first way I found that worked. If you know another way without the redundancy I would love to hear it. I assume you were talking about an include statement something like the one below.



Could you give me an example? All of my code is posted

**gep13** · Jan 3rd, 2010, 07:53 AM

Hey,

Not quite, what I was referring to was this:

Code:

<script type="text/javascript" src="simplemethods.js"></script>

Have a look here:

http://www.yourhtmlsource.com/javasc...avascript.html

and here:

http://www.w3schools.com/js/js_examples.asp

For more information.

Gary

**gem1204** · Jan 3rd, 2010, 08:19 AM

I think I understand your question now. I think you are referring to something like this:
<A HREF="javascript:newwindow()" ><IMG SRC="scare.jpg" border="0"></A>

What I used in my post was just a sample snippet. The code I eventually use will be used in a gridview control. When the user clicks on the part number in the grid I will create a query string using the part number then open my page with the query string and show the sales summary by customer for that part.

I currently have everything working using response.redirect but that opned a whole page; my boss wanted more of a 'pop-up' screen.

**gep13** · Jan 3rd, 2010, 08:34 AM

Hey,

Ok, now I am lost.

Did you try including the javascript file in the head of your markup?

Gary

**gem1204** · Jan 3rd, 2010, 08:47 AM

I included the java script in the markup. This is from my initial post

HTML Code:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>
<!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">
<script language="javascript" type="text/javascript" src="JScript.js"  ></script>
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
          <asp:Button ID="btnOpenPop" runat="server" Text="Open Pop"  />
    </div>
    </form>
</body>
</html>

**mendhak** · Jan 3rd, 2010, 09:24 AM

Registering the file and calling the function are two different things. Use RegisterClientScriptInclude to include the JS on your page - that simply produces the <script> tag and points to the JS file. Then, use RegisterClientScript or RegisterStartupScript to call the JS function that you want, the JS function can be on the page itself or in the JS file that you just included.

**gem1204** · Jan 3rd, 2010, 09:54 AM

Hello mendhak,

I'm confused, This is what I think you meant
If you use
Page.ClientScript.RegisterClientScriptInclude("Java1", ResolveClientUrl("Jscript.js"))
then you don't need to use
<script language="javascript" type="text/javascript" src="JScript.js" ></script> because it redundant. That was my question about redundancy.

I just tried that and it didn't work. I removed the <script language="javascript" type="text/javascript" src="JScript.js" ></script> and in the page load I used

Code:

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            Page.ClientScript.RegisterClientScriptInclude("Java1", ResolveClientUrl("Jscript.js"))
            'This does the same thing as
            ' <script language="javascript" type="text/javascript" src="JScript.js"  ></script> Right?
        End If
    End Sub

in the button to call the function I used

Code:

 Dim url As String = "http://www.yahoo.com"
        ClientScript.RegisterStartupScript(Me.GetType(), "OpenWin", "<script>openNewWin2('" & url & "')</script>")

It didn't work. what am I doing wrong? Is the vb code in the wrong place?

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