Hi,

How can I load JavaScript via a callback?

For example, I want to add a separated JavaScript file to UserControl1.ascx form this example: http://www.devexpress.com/Support/Center/e/E346.aspx

So I changed UserControl1.asx to this:

 <%@ Control Language="C#" AutoEventWireup="true" CodeFile="UserControl1.ascx.cs" Inherits="ASPxperience_PopupControl_HowToLoadUserControlViaCallback_UserControl1" %>

 <%@ Register Assembly="DevExpress.Web.ASPxEditors.v8.1" Namespace="DevExpress.Web.ASPxEditors"

     TagPrefix="dxe" %>

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

 <table cellpadding="0" cellspacing="0" style="width: 100%;">

     <tr>

         <td>

             <dxe:ASPxLabel ID="ASPxLabel1" runat="server" Text="UserControl 1 has been loaded successfully">

             </dxe:ASPxLabel>

         </td>

     </tr>

     <tr>

         <td style="padding-top: 10px;" align="center">

             <dxe:ASPxButton ID="okButton1" runat="server" Text="Ok" AutoPostBack="false">

                 <ClientSideEvents Click="function(s, e) { MyJSFunction(); } "/>

             </dxe:ASPxButton>

         </td>

     </tr>

 </table>

MyJSFunction();  is added in MyJavaScript.js. But when I ran this, MyJSFunction(); can’t be found? Why is that?

I hope you can explain this to me.

Thanks,

Thieme

Thieme,

   You cannot load javascript from a callback.  This can only be registered on a Postback then called on the client side.

Okay, thanks for reply.

But when I load an ASPxGridView via a callback, I see variable WebResource.axd which consist of JavaScript code. I am wondering how they do that.

Thanks,
Thieme

ClientScript.RegisterClientScriptBlock(GetType(), "__MyScriptKey", "some javascript here", true);  If you add the script tag to your javascript, then set last param to false.  The last param adds that for you if set to true.  You can also register a javascript file.

Hi!

Included scripts, which are obtained from the server via a callback and then inserted into the page's HTML markup, aren't interpreted by the client browser, by default.
If you call a function from such an included script, an exception is raised.
We've found a workaround to this problem for our controls internally, by searching on the client side for included scripts with specific predefined IDs (which start from 'dxis_') and making them available to be executed by the browser.
For example:

Yes, thanks it works now!

Thank you very much :)

Hi Thieme,
This subject was already discussed here:

http://community.devexpress.com/forums/p/68498/233078.aspx#233039