Re: Re: The issue while calling the Javascript from managed code

mchlsync — Sat, 29 Dec 2007 10:38:15 GMT

thanks.

Re: The issue while calling the Javascript from managed code

swildermuth — Fri, 28 Dec 2007 23:29:34 GMT

I am not sure why the sender is always null, that might be a bug. But the bigger issue is the event argument. To fix this you must mark the EventArgs as scriptable:

[Scriptable]
public class EventArgs<T> : EventArgs
{
private T _data;

    public EventArgs(T args)
    {
      _data = args;
    }

    [Scriptable]
    public T Data
    {
      get
      {
        return _data;
      }
    }
}

HTH

The issue while calling the Javascript from managed code

mchlsync — Fri, 28 Dec 2007 02:52:50 GMT

I'm trying to answer this post and I got one issue that I think it is a bug.

What I'm trying to do is that trying to pass one value to Javascript function from Managed Code. As there is no parameter in EventArgs class, I created new class with parameter.It is working fine. then, The problem is that the property that I created "T Data" is not shown in Javascript. another thing that I notice is that sender is always null even we are sending the object.

The new EventArgs class with parameters

public class EventArgs<T> : EventArgs{
        private T _data;

        public EventArgs(T args)
        {
            _data = args;
        }

        public T Data
        {
            get
            {
                return _data;
            }
        }
    }

Page.xaml.cs

[Scriptable]
public partial class Page : Canvas {

        public Page() {

            WebApplication.Current.RegisterScriptableObject("EntryPoint", this);
            MouseLeftButtonDown += Page_MouseLeftButtonDown;
        }
        void Page_MouseLeftButtonDown(object sender, MouseEventArgs e) {
            if (CallbackToBrowser != null) {
                CallbackToBrowser(this, new EventArgs<string>("my value"));
            }
        }

[Scriptable]
public event EventHandler CallbackToBrowser;

}

TestPage.html.js

// JScript source code

//contains calls to silverlight.js, example below loads Page.xaml
function createSilverlight()
{
    Silverlight.createObjectEx({
        source: "Page.xaml",
        parentElement: document.getElementById("SilverlightControlHost"),
        id: "SilverlightControl",
        properties: {
            width: "100%",
            height: "100%",
            version: "1.1",
            enableHtmlAccess: "true"
        },
        events: {
           onLoad: OnLoaded
        }
    });

    // Give the keyboard focus to the Silverlight control by default
    document.body.onload = function() {
      var silverlightControl = document.getElementById('SilverlightControl');
      if (silverlightControl)
      silverlightControl.focus();
    }
}
function OnLoaded(sender, args)
{
    sender.Content.EntryPoint.CallbackToBrowser = onManagedCallback;
}

function onManagedCallback(sender, args)
{
    if(args.Data){                                              //ERROR is here. args is nothing. sender is null.
        alert(args.Data);
    }
}

Is that a bug or Did I miss something in my code? Thanks in advance.

Report a Silverlight Bug

Re: Re: The issue while calling the Javascript from managed code

Re: The issue while calling the Javascript from managed code

The issue while calling the Javascript from managed code