CODEWITHSUNDEEP
c#silverlight
user1240679
user1240679

Reputation: 6979

GetManifestStream in silverlight to load xml file

I have a Silverlight application in which I am doing the following thing to load a XML file, and further to parse it.

I have set the Build Action to Embedded Resource, Copy to Output Directory.
The code that I am using is:

try
            {
                Xmlfile = XDocument.Load(Assembly.GetExecutingAssembly().GetManifestResourceStream("file.xml"));
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

Message that I receive as an exception:
Value cannot be null.
Parameter name: input

EDIT

I tried the following which works (in WPF), but gives problem in Silverlight:

Assembly.GetExecutingAssembly().GetManifestResourceStream(Assembly.GetExecutingAssembly().GetName().Name + ".file.xml")

Error:

'System.Reflection.Assembly.GetName()' is inaccessible due to its protection level

Upvotes: 1

Views: 1020

Answers (2)

John Washburn
John Washburn

Reputation: 578

I don't have an answer yet, but the prepend "solution" does not work for Silverlight 5 apps.

If you complie the proffered code withing a Silverlight 5.0 project you will get 'System.Reflection.Assembly.GetName()' is inaccessible due to its protection level at compile time.

For the record I get similar errors for:

System.Reflection.Assembly.GetName();
System.Reflection.Assembly.GetEntryAssembly()
<someAssembly>.GetReferencedAssemblies()

For the other GetName() overload you get the same protection error.

<someAssembly>.GetType(fullyQualifiedTypeName, false, true);

'System.Reflection.Assembly.GetType(string, bool, bool)' is inaccessible due to its protection level

I suspect the protection level error stems from the fact that Silverlight apps are only partially trusted code and Reflection by its nature is requires high trust. But, in the end I merely speculating about what is behind the Microsoft code wall.

Is there an article on MSDN or somewhere that describes which portions of C# reflection vis a vis Assemblies that is disabled/protect when incorporated into a Silverlight 5 web app?

Upvotes: 1

McGarnagle
McGarnagle

Reputation: 102783

You will need to prepend the name of your assembly and its subfolders, like this:

string assemblyName = System.Reflection.Assembly.GetExecutingAssembly().GetName().Name;
XDocument.Load(assemblyName + ".subfolder.file.xml");

Sometimes it's not clear exactly what the subfolder(s) should be. If that's the case, just inspect the names directly using this:

string[] names = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceNames();

Upvotes: 1

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