Programming with .NET - General

Re: Re: Calling Javascript method from Silverlight, passing extra parameters

mchlSync — Sat, 29 Dec 2007 10:36:35 GMT

I forget to put [Scriptable] in my EventArgs class. You can try the code below. I hope it works.

The new EventArgs class with parameters

[Scriptable]
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){
        alert(args.Data);
    }
}

Re: Re: Calling Javascript method from Silverlight, passing extra parameters

robert.pieprzny — Sat, 29 Dec 2007 10:16:49 GMT

http://silverlight.net/forums/t/7729.aspx

You need construct your own EventArgs in CallbackToBrowser(this, new EventArgs());

How do it you find in msdn it's simple.

Re: Re: Calling Javascript method from Silverlight, passing extra parameters

Brauliod — Fri, 28 Dec 2007 12:21:03 GMT

Thanks for the info, in the mean time I will use HTML hidden fields as a workaround.

Re: Calling Javascript method from Silverlight, passing extra parameters

mchlSync — Fri, 28 Dec 2007 02:53:25 GMT

I think it doesn't support or still has some bugs for that.

I reported it in this link. you can track it.

Re: Calling Javascript method from Silverlight, passing extra parameters

Brauliod — Thu, 27 Dec 2007 21:54:53 GMT

Just add my custom fixed parameters, e.g. several strings (I guess I can pass just some basic types, string, number...)

Re: Calling Javascript method from Silverlight, passing extra parameters

mchlSync — Thu, 27 Dec 2007 17:45:18 GMT

brauliod:
add extra params to the EventArgs

What do you meant by "extra parameters" ? You mean, you want to pass the unlimited numbers of parameters to Javascript function?

Calling Javascript method from Silverlight, passing extra parameters

Brauliod — Tue, 25 Dec 2007 16:56:03 GMT

Hi,

I have seen several samples about how to call a javascript function from silverlight, that's nice, but... all samples does not pass any extra param to the javascript method (using the other way around, call from javascript to ajax you can add for instance extra string params). Anyone has a sample about how to do this, or add extra params to the EventArgs?

Thanks

Braulio