I have a bit of a predicament in which I am seeking some advice and I currently have limited knowledge with regards to whole Universal applications.
I currently have a Winforms application that needs to call the CameraCaptureUI control; however, it turns out that this control is native to Windows 8.1 and Universal applications.
At first I was going to convert the application to a Universal; however, this isn't a possibility since it relies on some third party software that isn't available as portable library targetting the .Net Core fraemwork, and is unable to be converted to one at the time.
I thought I might go with a portable library, but this was a deal breaker b/c I couldn't reference the CameraCaptureUI control.
My next logical step was that since this class is unavailable via a regular Winforms project, I thought I could add a Universal project to the solution and use it as a wrapper to call the CameraCaptureUI. I could then perform the processing I needed from within the other executable by seting up a ProcessStartInfo pointing to the executable of the Universal application and wait for it to complete. This would be fine; however, you cannot run a Universal application without the context of an app container.
That brings me to my current predicament. What would you recommend as the best approach to tackling this? I really need to call the executable from the Universal app, or at the very least the CameraCaptureUI, from within the Winforms application. Calling the Camera straight up isn't an option because I need to be able to retrieve the photo(s)/video(s) the user took. I'd also like to keep it to a single installation instance. We do currently use ClickOnce as our deployment method.
Has anyone else ran across this before or could offer some suggestions?
Any advice is greatly appreciated!
Thanks,
Nathan
Related
Can i place my libraries in some where over the internet and load them from cloud each time the app runs instead of being placed beside the *.exe file ?
As far as I know, Prism does not provide the functionality to do this in desktop applications as out of the box. However, Prism allows you to extend its functionality by implementing your own versions for some of its components. For this particular case I believe you might need to create your own implementation of an IModuleTypeLoader that obtains the files from the cloud instead of the local file system. You can check the FileModuleTypeLoader implementation of Prism and use it as a starting point.
Today, while I'm running a Silverlight project in the Internet Explorer by pressing F5 in Visual Studio 2012 in my Windows 8 machine, I found that McAfee started to block Silverlight XAPs (Which is loaded by Prism).
This leads me to think again about the future of Silverlight. I'm at the beginning of my LOB Application. Should I stop what I like to work in Silverlight and return back to WPF. I which that I can continue to develop in Silverlight until Windows 8 becomes rich like Silverlight. That is why I limit the Model and MVVM to PCL to be easier to be ported to WinRT in the future. Using await async and so...
Please advise me which is better for a LOB application that will run in three countries throw the Internet. Should I continue in Silverlight for zero deployment, or work in WPF or even Windows Forms and use clickonce?
The fact that McAffee blocked something has NOTHING to do with it's long term future. McAfee is nobody, they don't determine whether or not a specific technology can be used or not, or will be used in the future.
Silverlight seems to have reached a dead end, due to Microsoft realizing that if they create a multi-platform application environment, people might just stop using Windows.
WPF also seems to have been abandoned in favor or WinRT XAML, but of course WinRT XAML is not an option for us developers at the moment, simply because it is Windows 8-only, and our customers don't have Windows 8 or greater.
Besides, technically, WinRT-XAML seems to be really inferior to WPF XAML, and lacks many important features.
Of course winforms is completely useless and is not an option, unless you need to run your applications in my grandma's 80386 computer with an Hercules monochrome monitor
(exaggeration).
Seriously, that dead technology is not the answer to any of today's challenges. Things that you can do easily in any of the XAML-based technologies are either impossible or require a bunch of horrible hacks in winforms.
I suppose the definitive answer depends a lot on the usage scenario, for example:
Silverlight makes more sense if you have to publish your application in a web site and have anyone download it and use it.
WinRT XAML makes sense only if you target Windows 8, or want to create 'metro style' apps.
WPF makes sense if you want to create Windows Desktop applications, and have them deployed via ClickOnce or Windows Installer to a more limited and controlled set of users (because it needs installation of the .Net Framework, which Click-Once can deal with anyways).
winforms makes no sense whatsoever because it's a completely useless dinosaur technology that doesn't support anything.
Thank you very much for your answer and sharing your experience with me. I always try keeping WinRT as a strategy planning for each line of code I write. As I wish to migrate my code easily to WinRT in the future. The future is translated to me as may be within two years I may find myself in a situation that we will be targeted to migrate to something like Windows 9.
The best successful migration scenario - as I wish, it could be by increasing the usage of PCL at the client side as much as possible and test in a small piece of WinRT module.
We hope that Microsoft succeed in Windows 9.
I am sadly decided to shift to WPF instead of Silverlight in case that Silverlight depends on browsers that may not be supported in the future. As we here that Chrome, Safari and others are stopping supporting Silverlight. Why should I insist in relaying with such great technology that is dead before it finishes.
The main difficulties I could face in the future migration could be tied to two patterns:
- Prism.Regions: Windows Store has better than that.
- Prism.Modularity: Windows Store has no migration strategy to that.
At least at the moment I'm writing my thoughts Prism for Windows Store are far from implementing Regions and Modularity.
This is not a final answer but a clue of my what I should and should not to do.
Silverlight Out of Browser technology and WPF ClickOnce on the surface have similarities. Easy and simple deployment, the ability to specify the level of trust access to the underlying host, etc.
What are the key issues I need to consider when choosing one over the other?
To put a finer point on it, I'll be deploying LOB apps on a corporate network running only windows computers.
The big one is cross platform compatibility. If you need you app to run on a mac as well as windows (not sure if Silverlight is supported in Linux yet) then use Silverligt. If you want to make an assumption that all your users will be in a windows machine then go WPF.
Obviously WPF has a much richer toolkit than silverlight so it may well be that silverlight just isn't an option. If I was just building for windows though I know my job would be easier in WPF.
Given that you are targetting a private infrastructure running Windows, two points worth thinking about
Wpf has a richer control tree, whereas Silverlight is a reduced set for compact size
Wpf requires .Net framework installed locally, whereas Silverlight has its own platform independent browser-based runtime
While your target platform will likely have the latest .Net framework installed, rendering this last point moot, keep in mind any updates to the framework [ie .Net4.0 and any future updates] may require a restart of the machine - which is a major pain point for businesses that demand constant-on stateful desktops [ie anything in finance, like banks and trading].
As with all problems, your requirements, not the technology, should inform your solution. :)
You mentioned trust access to the host which I think rules out Silverlight unless you want to run SL4 (beta).
We recently went through a lot of discussion about file system access. Silverlight 3 runs in a partial trust sandbox more or less. You can't maintain a pointer to files in the files system outside of your application's isolated storage. This was an issue for us as we wanted the user to be able to use the application to reference odds and ends on your file system. That said you can allow the users to load and save files from anywhere on the system but you just get/or push the file stream and (to the best of my knowledge) don't have access to the folder or file path information.
Silverlight 4 (in beta) has support for your application running in full trust mode. I haven't played with this yet however and can't speak to how well it works.
In talking with a lot of people who work with both Silverlight and WPF, even those who are excited about Silverlight and push for it strongly, I hear a lot of the say fairly emphatically that if you are going to be developing exclusively for a full-trust Windows environment, WPF is hands-down the obvious choice.
That's not to say that Silverlight is an inferior product or that there aren't times will Silverlight will be the clear winner. But when you say "I'll be deploying LOB apps on a corporate network running only windows computers," it sounds like WPF is the clear winnder.
You could decide to go down the Silverlight route in anticipation of all of the great new OOB feature os SL4. I've even heard rumors that SL and WPF will eventually merge, so it may not even really matter, right? Well, I think what you'll find if you go with Silverlight is that some of the advanced features that you thought were there weren't there in the way you expected. For example, SL4 will be able to run in "Elevated Trust" (not full trust) and you might find this limiting at a frustrating point in the project where a lot of your code base is already in Silverlight.
Certainly keep your eyes on Silverlight, but for your current business case, WPF will likely be the best fit.
We are planning to build a new integration component that can provide us access to user's machine installed apps from our web site.
The first word that came to me was ActiveX, but our expertise with the technology was not the best in the past.
Thinkink a lit bit more, the work Silverlight also came to my head, but the full trust thing was one of the few things I remembered reading about the technology..
The question is: is there a way that Silverlight (2, 3, 4, whatever) can run as a full trusted application from within the browser?
Links are appreciated.
Filipe
Unfortunately, no. Full trust is a feature of Silverlight 4, currently in beta, and is restricted to out-of-browser applications.
Additionally, full trust SL4 applications do not have unrestricted access to the system (particularly file system), though this may change before before release (if I have anything to do with it).
Edit: If you are considering ActiveX (which is Windows/IE only), you might want to have a look at WPF, since it can run full trust from the browser (if it's in a trusted zone).
No, like Richard said, this is not at all possible inside the browser, even in SL4. There is a sandbox, and you live in it. You can talk to web services, other Silverlight applications or the browser.
By talking to the browser, I mean you can talk to the DOM and the Javascript engine. We needed to launch a Windows application and communicate to it via Silverlight. We accomplished this by putting a small ActiveX control in the web page. It is responsible for launching the WinForms application and handling inter-process communication to it.
This method has many drawbacks: It can only work in IE, and it only works in Windows. You might also run into permissions issues. The ActiveX component needs to be installed along with the desktop application, or as an additional download. The deployment story there is pretty awful, if you ask me.
In our case, the analysts were willing to deal with the restrictions for the re-usability of an existing application, and we consider it to be an optional feature.
Does it have to be a web application? sounds like you want a desktop app. It can be easiliy distributed with one Click deployment. Will work on windows only but since you were considering ActiveX sounds like that's what you need.
Well - if you're hosting the silverlight control from an ASP.NET application - Believe you have access to
Request.ServerVariables["AUTH_USER"];
...and you can pass that on to your control as a parameter.
D
Silverlight 3.0 beta has just been announced at Microsofts Mix Conference in Las Vegas.
Two features of the new beta are 3D-graphics and the ability to run applications outside of the browser, which to me seemed to be two of the major features that WPF (Windows Presentation Foundation) previously offered over silverlight.
I am currently evaluating WPF and Silverlight for possible use in our companies future development activity, and this announcement has left me confused as to the intended direction of these two UI technologies and why I would choose one over the other.
Has anyone implemented a new application using WPF recently, and if so, what drove you to that decision? Given the announced changes to silverlight, Would your decision have changed had you made it now, and if not, why?
Any advice would be appreciated.
The biggest difference I find is the asynchronous model you have to adopt
in your Silverlight application.
It does seems like an advantage (and it can be), but it does make
life very difficult sometimes.
There are also some limitations that can be a real challenge like the absence
of print support.
I would recommend Silverlight over WPF when:
- There is no need for best possible performance (graphics included)
- Can get around the absence of print support (it will come, we just don't know when)
- Camera/Microphone support is not needed
- Can tolerate the assync app/development model
- Can tolerate limitations on WCF (no support for WS-Security at this point)
- There is no need to store huge amount of data on the client.
- There is no need to direct integration with client side applications like Office.
- Has a server to host your application
I would say the main difference is that WPF requires the client to have the .Net 3.0+ framework. Silverlight only requires the runtime. Now that being said, WPF is geared more for controlled environments such as an intranet. Silverlight is meant for the public web. Another difference is that Silverlight is cross platform (Windows, Mac, Linux in the future & Cross browser). WPF is meant for Windows only.
The .Net framework can be a huge download for some users. Silverlight is only 4-5MBs. This is a big difference to run your app on the web, but not a big issue if its an internal application at your company.
Silverlight is Sandboxed which is meant for web use. So if your app requires more permissions you will need WPF.
There are also some differences between Silverlight code and WPF. But from what I've heard, the ultimate goal is to get a Silverlight to run inside of WPF with minimal code changes. But they aren't there just yet.
I have just worked on a WPF project that in hindsight we feel we might have chosen SilverLight for. It is probably more important to know the differences and select the one that is most appropriate for what you're doing.
Here's my starter for ten on some of the important differences - there were originally some differences in the available controls, but that has largely been smoothed out now.
Silverlight
Runs entirely on the client with AJAX
calls to the server for data
Can run on any server, including Windows and Linux / Apache
Uses COMPACT .NET framework
WPF
Runs on the client... usually calls services for data
Runs on Windows XP / Vista with .NET 3.5
Utilises the entire .NET framework
Silverlight is basically a stripped down version of WPF in order to make the runtime libary download as small as possible.
As a result, WPF simply has a lot more functionality available in it and tasks that are simple in WPF often become not so simple in Silverlight.
If running as a web app is not a requirement then the decision is a no-brainer - WPF all the way.
Has anyone implemented a new application using WPF recently, and if so, what drove you to that decision: Well since WPF was desktop only (or browser based using XBAPS - but that was more a deployment system than a real system) that was a good reason to it.
"Would your decision have changed had you made it now, and if not, why?" - No Silverlight, even on the desktop in v3, is still highly sandboxed and so certain functions are going to be hard/impossible to do due to the sandbox. Also the ability to use DirectX parts in WPF will still give another optimisation area which Silverlight and it's 3d won't be able to use.
It's worth noting that Silverlight's 3D is not the full 3D support of WPF, but only projection of 2D into 3D - i.e. take the 2D plane and allow rotation in X, Y & Z directions. WPF has full 3D modelling with materials, view ports, lighting and camera positional support etc.
I'm well along in the development of our first WPF app for release. Silverlight 3 looks great, but for this application I would still have chosen WPF. The application centers around presenting and manipulating very large sets of images hosted on a central server on our clients' networks. Additionally, the software update/change rate will be minimal. Mass import of new images from a local drive, no Internet connectivity requirements, performance concerns, etc. make this a project well suited for WPF.
One of our upcoming projects, however, will require many remote users to access a single data store on our network. The data they work with requires significant validation and error handling, so running that code locally is ideal. They will need the ability to work both on and offline and remain in synch (probably with SQL Data Services). SLOOB (Silverlight Out Of the Browser) will most likely be our choice for that one so they can have all the Silverlight advantages but use it like a regularly installed application, even without an Internet connection.
Both formats have their place: the trick will be to avoid using Silverlight for everything - we have more tools than just 1 hammer. :-)
Another difference is that with SL you only have one 'window', you can't have dialogs (they can be simulated but their size is limited to the main window) and you can't add multi monitor support.
If you have to interact with existing business applications (e.g. open a document in the archive viewer) you need to use WPF.
I recently have built several internal tool using wpf, and I chose it simply because It was easier for me coming from win32 work. I don't really think that the differences are major, and really... everything i have seen/heard indicates that porting between wpf and silverlight is quite easy.
Storage: You only have 25MB of isolated storage out-of-browser. If I remember correctly from some mix09 video, this limit is lower if your app is in-browser.
http://bliny.net/blog/post/Out-of-Browser-with-Silverlight-3.aspx
No FlowDocument: So there are limitations there too.