I have a system which was using Ninject and loading assemblies using the file pattern kernel load method. Things were working fine with this setup.
A new requirement for the application was to bundle everything into a single exe. We used the technique described here for that. Thus to register everything with Ninject we needed to load the assemblies and call the kernel load for each assembly. However, this would not work. Ninject would always fail even though the binding was registered. I saw it in the debugger as being registered and it worked in the immediate window, but not in the code.
The only solution we found was to manually register each NinjectModule.
Is it possible to use Ninject when the assembly is bundled inside of another one?
The only solution was to manually pass in references to the NinjectModule.
Related
I have an old asp.net that I'd like to move from a Windows environment to Linux.
The application has an old Web.config, a bunch of dlls and an App_code folder.
Can you point me in the right direction to getting this working?
What I've tried so far:
dotnet publish -c Release -o /var/www/blah
But this complains:
app_code/Rewriter.cs(3,14): error CS0234: The type or namespace name 'Web' does not exist in the namespace 'System' (are you missing an assembly reference?
I read that System.Web doesn't really exist anymore.
My question is, can I reference some kind of build environment that will build and deploy this old-style application? Or so I need to port all the code?
Migrate any business logic to classes, so you can reuse it. The more code you can move to classes (or even class libraries), the easier it will be. Then create a new ASP.NET core application and rebuild the UI bits.
The hardest part is if you have a lot of spaghetti because you over-utilized the event methods in your code behind files. You may end up with a lot of refactoring, but the idea is to keep it working as is, but with the actual code outside of the ASPX pages. Once your event handlers look more like this
public void THisButton_Click(e as EventArgs)
{
OtherClass.Method();
}
you will find it much easier to migrate to MVC, which is how you will want to design the UI with for ASP.NET Core.
If this is not making sense, let me know, and I can see if I can point you to some information that helps.
I have a working SignalR application, my global.asax.cs does all the usual MapHubs() etc, and I'm using a custom IAssemblyLocator which also loads in-memory assemblies as well as referenced assemblies. The two hubs I have are created at runtime in in-memory assemblies, and this works fine - hubs can push messages to clients etc.
At some point after the application has started, I want to add another hub at run time which will sit in it's own in-memory assembly, and make it appear in the signalr/hubs/ file.
How do I do this?
Calling MapHubs again results in an error because I already have the route defined. Removing the route (which I've only managed to do using RouteTable.Routes.Remove(RouteTable.Routes[0]) so far, and obviously isn't ideal) doesn't seem to work.
Is there a nice way to do this?
Use the alternate syntax instead of using the static signalr/hubs file since it will never update:
http://www.asp.net/signalr/overview/hubs-api/hubs-api-guide-javascript-client#genproxy
I'm building an application that will load untrusted assemblies for inspection (i.e. retrieval of the assembly full name). For security reasons, I'm trying to think of a way that these assemblies could be written that would allow them to execute code when loaded. I haven't code up with a method yet, but wanted to throw it out here to see if anyone could.
I'm aware that I could load these assemblies into an untrusted app domain, effectively stopping them from doing almost anything, but I wanted to avoid the complexity if it's un-needed.
Specifically, I will be calling Assembly.Load and <LoadedAssebmly>.FullName. Maybe there's a better way to load the assembly name without using the Assembly class?
Thanks,
Matt
First of all, there's the AssemblyName class. It allows you to find the assembly's name without loading it. Second, you can load assemblies using Assembly.ReflectionOnlyLoad, which uses the reflection-only context -- no code can be executed from such an assembly.
Yes, it is possible: .Net: Running code when assembly is loaded
I suggest, you use a method to inspect the assembly, that doesn't load it, i.e. Mono.Cecil
I have several DNN modules that I wish to update silently, using the portal's built-in module upgrade facilities called from a separate application, in this case a Windows service. I was able to make it all work with version 4.3 of the portal by modifying the DNN source in key areas to allow DotNetNuke.dll to function outside of a web application. I'm now trying to do the same thing with the 4.9.0 source code and I'm having problems.
Everything works fine until DNN tries to read from the database. I have my Windows service project, the DNN library project, and several other related projects loaded in one VS solution (the additional projects are the same ones that are in the main solution file provided with the DNN source). I call PaInstaller.Install in my service to update each module. Execution gets to reflection.vb and then it tries to create a DotNetNuke.Data.SqlDataProvider object based on the type name. It raises an exception when calling System.Web.Compilation.BuildManager.GetType. The exception says:
Could not load type 'DotNetNuke.Data.SqlDataProvider' from assembly 'System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
I read this to mean it simply couldn't locate the DotNetNuke.SqlDataProvider.dll assembly. What's strange is that assembly is in the Bin folder for the DNN library project, and I also have it in the folder where my Windows service is running. The actual SqlDataProvider project is also loaded in the solution. I can't for the life of me understand why the runtime environment can't locate the assembly.
Has anyone tried something like this before, or know what could cause an assembly not to be found while stepping through the DNN source? Am I better off using something other than BuildManager.GetType to get an instance of the SQL provider type?
Chris,
Honestly depending on your needs, I would look at doing this a different way, as this is going to be very fragile with each DNN upgrade that happens in the future.
I'd look more towards using the "bulk install" option that DNN already has. Have your service upload the module zips to the /install/modules folder, then from there, call /install/install.aspx?mode=installresources and you are done!
If you need a third party solution to parse the results, have your windows service go through and pull the HTML response and parse it to validate success.
How can I check third-party components that is property installed before the web page start in web.config. And throw error before start.
Find something about the component that your code can test, then have the code test it. Best place for testing it would probably be the Application_Start event handler in global.asax.
What to test depends on what kind of component you are talking about. You could use reflection to attempt to locate information about a known assembly if the component is a compiled assembly referenced by your application, or you could use System.IO to check a physical file on the file system that should exist. You could possibly even call a constructor on some object from the component and verify that it instantiates correctly.