I'm trying to host a remote Silverlight widget in an html file that will exist locally on the hard drive, but whenever I open the html file, the Silverlight content does not show up. If I move the file to a web server and then access it through http, it works perfectly. I figured out (or at least I assume) that the widget is trying to make a call back to the web server but it's failing because of the cross zone restrictions in SL 2+. I've also seen a few reports from users talking about running into this issue when debugging from a local file. My question is, how can I tell for sure that this is the issue going on/what tools might I use to verify my hypothesis?
Additionally, (knowing full well that there are elevation of privileges security concerns to take into account) is there any way that I could declare the web services the widget calls as safe (for instance adding to the trusted sites) in such a way that Silverlight would be able to perform the calls without the security exceptions?
An example of a widget I'm talking about is below:
<object
type="application/x-silverlight-2"
data="data:application/x-silverlight-2,"
width="400" height="400">
<param name="minRuntimeVersion" value="3.0.40624.0" />
<param name="background" value="#141414" />
<param name="splashScreenSource"
value="http://memorabilia.hardrock.com/Widget/3.2009.1014.0/Splash.xaml" />
<param name="source"
value="http://memorabilia.hardrock.com/Widget/3.2009.1014.0/HardRock.Memorabilia.Silverlight.Widget.xap" />
<param name="enableHtmlAccess" value="true" />
<param name="initParams" value="item=034739" />
<a href="http://go.microsoft.com/fwlink/?linkid=149156&v=3.0.40624.0">
<img src="http://memorabilia.hardrock.com/Widget/3.2009.1014.0/Ping.gif?type=install&item=034739"
style="background:#141414
url(http://content.memorabilia.hardrock.com/Assets/Images/widget/034739.jpg)
no-repeat center;margin:0;padding:0;border:0;"
width="400" height="400" />
</a>
</object>
This is an issue of a cross protocol violation - a page with a file:// protocol cannot access assets with an http:// protocol. This also helps protect your your computer from accessed by a malicious Silverlight application.
Related
I need to call Silverlight method from my MVC4 application controller.
I load Silverlight using object tag,
<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="50%" height="100%" style="border:1px solid #cdcdcd">
<param name="source" value="ClientBin/HelloWorld.xap"/>
<param name="onError" value="onSilverlightError" />
<param name="background" value="white" />
<param name="minRuntimeVersion" value="5.0.61118.0" />
<param name="autoUpgrade" value="true" />
<param name="onLoad" value="pluginLoaded" />
<a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=5.0.61118.0" style="text-decoration:none">
<img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>
</a>
</object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div>
and to call Silverlight method, I'm using JS method.
BUT I want to call silverlight method from MVC4-controllder.
Is it possible? if so, How should I do?
please advice me.
//Silverlight method
[ScriptableMember]
public void ShowAlertPopup(string message)
{
MessageBox.Show(message, "Message From JavaScript", MessageBoxButton.OK);
}
That is impossible. Silverlight runs on the client as well as JavaScript, while MVC runs on the server. These are different machines.
If you need to reuse a method, you could use either of:
Source code sharing (section 'Adding an Existing Item as a Link')
Portable Library project
RIA Services Shared Code features
If the only thing you need is reusing a couple of methods, I suggest moving them to a separate file and then linking the file to 2 projects (a MVC project and a Silverlight project).
One important note is that you can only reuse code that uses features present both in Silverlight and .NET. You can't use Silverlight-specific features (e.g. browser interaction) from an MVC application.
If you need to send messages from your server to your client, you have to implement either of:
Polling
Long polling
Server-Sent events
WebSockets
SignalR is a great library for simplifying the task.
I have a very strange problem.
I would like to add some silverlight page to an action method in the Account controller (view for action method within it) , however when I navigate it gives me silverlight exception that it cannot download the silverlight.
But when I move it another controller (say Home controller view) it works well !!
I have checked existence of xap , MIME types in ISS everything is well
For some unknow reason I had to write
<param name="source" value="<% = Url.Content("~/ClientBin/TakingMyPicture.xap") %>"/>
rather than
<param name="source" value="~/ClientBin/TakingMyPicture.xap"/>
Our project uses Silverlight 4 and Microsoft Pivot Viewer which is a Data Presentation tool that works in Silverlight.
Microsoft Pivot Viewer makes it easier to interact with massive amounts of data in ways that are powerful, informative, and fun. Microsoft Live Labs tried to step back and design an interaction model that accommodates the complexity and scale of information rather than the traditional structure of the Web.
The Module within our application that uses Siliverlight and Microsoft Pivot Viewer has quite a bit of caching problems.
The Module within our application that uses Siliverlight and Microsoft Pivot Viewer dynamically retrieves images at runtime so that it present the images to the user in Siliverlight and Microsoft Pivot Viewer.
The problem that we have is that IE9 caches the images in Siliverlight and Microsoft Pivot Viewer.
The HTTP Response Headers on IIS is configured in such a way that Web Content expires immediately.
As soon as you add any URL parameter (e.g. “?v1″ or a dynamically generated parameter like in your code), client-side
caching is turned off by the browser unless an expiration date is explicitly set.
We tried the following in the Siliverlight and Microsoft Pivot Viewer Host ASPX file:
<div id="silverlightControlHost">
<object id="pivotViewer" data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="900">
<%
HttpContext.Current.Response.Cache.SetExpires(DateTime.UtcNow.AddDays(-1));
HttpContext.Current.Response.Cache.SetValidUntilExpires(false);
HttpContext.Current.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
HttpContext.Current.Response.Cache.SetNoStore();
string orgSourceValue = #"ClientBin/SilverlightPivotViewer.xap";
string param;
if (System.Diagnostics.Debugger.IsAttached)
param = "<param name=\"source\" value=\"" + orgSourceValue + "\" />";
else
{
string xappath = HttpContext.Current.Server.MapPath(#"") + #"\" + orgSourceValue;
DateTime xapCreationDate = System.IO.File.GetLastWriteTime(xappath);
param = "<param name=\"source\" value=\"" + orgSourceValue + "?ignore="
+ xapCreationDate.ToString() + "\" />";
}
Response.Write(param);
%>
<param name="onError" value="onSilverlightError" />
<param name="background" value="white" />
<param name="minRuntimeVersion" value="4.0.50401.0" />
<param name="autoUpgrade" value="true" />
<param name="initParams" value="cxml=Resources.cxml" />
<a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50401.0" style="text-decoration:none">
<img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>
</a>
</object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div>
Google Chrome and Mozilla Firefox seem to work fine.
However, IE9 fails because it keeps getting Out-of-Date data from Cache for Silverlight.
Our following efforts failed to resolved the caching issue:
1) IE9 of user still caches even after The HTTP Response Headers on IIS is configured in such a way that Web Content expires immediately.
2) IE9 of user still caches even after we ensure that the Silverlight XAP url is appended with a dynamically generated parameter.
Could someone please provide some steps as to how we should resolve the issue?
A very temporary fix - which you can only use during development - is to F12 on the webpage to bring up the developer tools. Then from the menu you pick Cache > Always refresh from server.
I wish I knew how to fix this more permanently.
I am running Windows Server 2008 SP2. I have an IIS 7.0 Webserver installed running IIS Media Services Beta 1. I also have WebDAV 7.5 installed.
I encoded a video file, MP4(H.264/AAC), to the smooth streaming protocol using Expression Encoder 4.0 Pro. Under "Default Web Site" I added a virtual directory to the encoded video and created a simple page with an embedded Silverlight player to view the content.
Simply put the page loads up, and never starts playing. If I go the the .ism file in a browser I can see it fine as an .xml.
I loaded up the default content that microsoft privides from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e44b0a2d-2e0c-48ff-bf57-3d05a20e2f6a&displayLang=en
If I try to play that file in the webpage it DOES work.
Here is my Question:
Why does the sample content work, but mine doesn't? Do I need to add some permissions somewhere so my file can be accessed? Was my file encoded incorrectly?
My File: http://128.113.16.8/library/kissxsis/1/1.ism/manifest
Sample File: http://128.113.16.8/library/bbb/Big%20Buck%20Bunny.ism/manifest
Edit1: Embed code for the player I am using to play the .ism
<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%">
<param name="source" value="SmoothStreamingBlackGlass.xap"/>
<param name="minRuntimeVersion" value="4.0.50401.0"/>
<param name="autoUpgrade" value="true"/>
<param name="InitParams" value="mediaurl= http://128.113.16.8/library/kissxsis/1/1.ism/Manifest"/>
</object>
Silverlight's MediaElement can't play an ism directly - you need to use a smooth streaming player in a Silverlight app.
Which player are you using?
Are you using the Silverlight Media Framework Player or the Smooth Streaming Media Element?
Did you follow the deployment guide?
How can I embed a demonstration applet written in Silverlight within a blog post? Is it possible to do so using any hosted blog engines, or only using a blog engine that I host myself?
I assume that I will need to use the same tags and .js as in a regular (X)HTML page with a SL control. Are there any hosted blog engines that will permit me to enter this? (Is it possible with blogger?)
Does the SL security model mean that the XAP file need to be hosted on the same site as the blog pages itself?
You can host a Silverlight app in HTML using the <object> tag, there is no need for the blog host to understand any of this. There is no server side element to hosting a Silverlight app its a purely client side thing.
<object id="SL" data="data:application/x-silverlight-2," type="application/x-silverlight-2" style="width:400px; height:300px">
<param name="source" value="MySLApp.xap" />
<param name="minRuntimeVersion" value="3.0.40624.0 />
<param name="initParams" value="someParam=value" />
<a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=3.0.40624.0" style="text-decoration: none;">
<img src="http://go.microsoft.com/fwlink/?LinkId=108181" style="border-style: none" alt="Get Microsoft Silverlight" />
</a>
</object>
In this case the Silverlight app "MySLApp.xap" is placed in the same folder as the HTML page using it. However it could be on a different server if you like. However access to the HTML Bridge will be blocked but then if your app is self contained and does not need to communicate with the host page then there is no problem.
I created a Silverlight xap to host hero images OR video in my wordpress theme - I pass the content to it using initparams and custom fields per post.
That way I can use the same xap to host videos with media controls if appropriate or images with cool fade ins/click effects
example image post:
http://www.blackspike.com/site/html/display-google-docs-spreadsheets-in-wordpress
example video post (click vid for controls):
http://www.blackspike.com/site/wpf/hanselmans-babysmash
Both using the same xap!
An easy solution that worked for me is just to use an iFrame. So I published the regular TestPage.html generated by Visual Studio to my web site (along with the .XAP file of course) and then embedded it:
<iframe src="http://www.lostbearlabs.com/sl/Spring001/TestPage.html" frameborder="0" width="400" height="400" scrolling="no" ></iframe>
Using blogger, I discovered this gotcha: Any attempt to make the HTML pretty (e.g. by splitting it into separate lines) causes blogger to insert spurious <br> tags into the output, even if I do my edits using the "Edit HTML" view. So the iFrame tag must all be on a single line!!
You might want to check your host has the required MIME types mapped:
http://learn.iis.net/page.aspx/262/configuring-iis-for-silverlight-applications/
according to this Server 2008 IIS7 should work out of the box but IIS6 may require MIME types adding...
The solution marked as answer above works well if the HTML page and the Silverlight xap file are hosted on the same server.
As this is not possible in most of the cases, as most of the bloggers use either blogger/WordPress. We do not have any way of setting the mime type on these hosting providers.
Here is a good link which explains in detail regarding hosting an Silverlight application in blogger.