Silverlight Slideshow + WCF ?

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Hi ,

I downloaded this Silverlight project in order to use it on my asp webproject .

http://designwithsilverlight.com/?p=162

The slide show works fine inside its project with WCF methode that returns the img url from my database .

but when I add the XAP file and the html test page to my web project , no img loaded .

any idea ?

when I use wbeservice\WCF outside from the Silverlight WebHost project as the webreference i'm getting this error :

An error occurred while trying to make a request to URI'localhost:25573/WebService1.asmx'.This could be due to attempting to access a service in a cross-domain way without a proper cross-domain policy in place, or a policy that is unsuitable for SOAP services.You may need to contact the owner of the service to publish a cross-domain policy file and to ensure it allows SOAP-related HTTP headers to be sent. This error may also be caused by using internal types in the web service proxy without using the InternalsVisibleToAttribute attribute. Please see the inner exception for more details. –

Posted 25-Jun-11 23:56pm

idanb

Updated 26-Jun-11 1:11am

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Mark Salsbery 26-Jun-11 12:31pm

Did you move the WCF service server-side code into your web project or are you you leaving it where it was? If the latter, then you'll need to have a cross-domain policy in place for it to work.

idanb 26-Jun-11 17:00pm

At start I moved the WCF service to the webproject , and it didnt work ,than I moved it back to the silverlight host project and it worked . thats the big problem, I need it to work with the WCF in my webproject ...

Mark Salsbery 26-Jun-11 17:11pm

Please use the "Reply" link here when replying to comments, otherwise the person you are replying to doesn't get notified! :) If applicaple, did you move the WCF configuration over (all the WCF stuff in web.config)? Also if any namespace and/or class names changed in the move then you may need to change those in the configuration. Test your service by hitting the service URL from a browser....if you see the WCF service page then at least it's up and working.

idanb 26-Jun-11 17:51pm

Thanks Mark , I already have WCF in my webproject that works for other things , I', trying to use it Insted the WCF inside SL project , I didnt moved the Web.config becuase I already got one im my webproject.

idanb 26-Jun-11 18:37pm

can you explain more or show me an example ?
10x .

Mark Salsbery 26-Jun-11 18:44pm

WCF is well documented[^]. You said you had a service working already, yes? It just didn't work across domain boundary, correct? See comment and link below...

Mark Salsbery 26-Jun-11 18:13pm

Ok I downloaded and looked at the GalleryWall projects....I thought it was already using WCF but it isn't, so nothing to copy over to your new project.

So as you stated: "when I use wbeservice\WCF outside from the Silverlight WebHost project as the webreference i'm getting this error"...Yes, when you try to make service calls outside of the Silverlight app's domain you will get that error. To fix it, you need to either host the service in the same domain as the silverlight app, or provide a cross domain policy: Making a Service Available Across Domain Boundaries[^]

idanb 26-Jun-11 18:49pm

ok , So what is the easiest way to bind it to my webpage ?
Create a WCF in the SL project and upload it as is, or try the crossdomain ? or any other way ?

Mark Salsbery 26-Jun-11 18:55pm

The easiest way is to add a Silverlight-enabled WCF service to the server application project, then add a service reference to that service in the Silverlight project. The service reference will create a proxy class you can use to make service calls from the Silverlight application.

If the Silverlight application will be hosted on a different domain than the server application hosting the WCF service, then you'll need to worry about cross domain policy, so you'll need to provide a cross domain policy file as described at the link.

idanb 26-Jun-11 19:13pm

Thats what I've done , I added WCF in the slideshow project with entity data model of my data base . It's working.
but it doesnt works with the WCF inside my webproject .

Mark Salsbery 26-Jun-11 19:32pm

Like I mentioned earlier - try accessing the service address from a browser. Does that work? If not, then the service is not configured properly. If it works, then either the client isn't connecting to the correct endpoint address or you have a cross-domain issue.

idanb 28-Jun-11 9:26am

I read about cross-domain , its a security issue that I dont want to get in it , I wonder how do I Binde This silverlight projet to My ASP project ?

Mark Salsbery 28-Jun-11 15:32pm

What do you mean by "Binde This silverlight projet to My ASP project"? Silverlight apps can be delivered on any HTML page. Create a fresh new silverlight project in Visual Studio. It will create the Silverlight client project and a server web project. In the web project you'll see both an HTML page and a ASPX page, both of which show how to embed a Silverlight app in a web page.

If you meant binding at the solution/project level, then go to the properties for your web app project, click on the Silverlight applications tab, and click the "Add..." button. Add the appropriate Silverlight project(s).

idanb 28-Jun-11 17:51pm

I want to add it to my project and let it use my WCF without the "cross-domain" Issue.

Mark Salsbery 28-Jun-11 17:59pm

Cross domain issue and project layout are not related in any way.

A silverlight app hosted at the domain http://domain1 cannot access a service in http://domain2 unless domain2 has a cross domain policy in place - effectively giving permission to access its domain from another domain.

How you organize your projects and solutions is up to you. If you don't know how to work with projects and solutions in Visual Studio then create a new Silverlight application using the supplied project templates and use the two created projects (server and client) as a guide.

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Abhinav S · Answer 1 · 2011-06-26T00:05:00

Solution 1

Make sure the startup is set to the html test page.
You can right click on the file and "set as startup".

Posted 26-Jun-11 0:05am

Abhinav S

Comments

idanb 26-Jun-11 6:25am

I tried that , no change .

I can see that the Xap file loaded , but no photos inside it , I opened a new WCF inside my webproject , I tried to get the Imgurls from database through it , seems there's a problem with that becuase it doent work , but the WCF inside the silverlight webhost project it works , I'm confused ....

how can I fix that ?

Abhinav S 26-Jun-11 7:20am

You are probably reading the URL of the webservices throught the aspx page (through initparms or some other mechanism).
This code wont be there in the html page - this could be another reason for the error.

idanb 26-Jun-11 7:22am

I'm using the silverlight HTML testpage, it works gr8 inside the sildeshow project but not inside the webproject.