I am relatively new to SignalR and every tutorial seems to be for a chat application or some variant. This is good to get to grips, but I am looking to have a grid that updates automatically on a database change. I have even gone through Pluralsights tutorial which shows this as a sample but then all it's practicals are for a chat application.
I do understand that this is what a search engine is for, but I have exhausted this channel, as above I found plenty of tutorials but all seem to be for a chat application.
Has anyone else noticed this, and if so has anyone found any good resources for tutorials that deal with real-time grids. Any help would be greatly appreciated.
You can use SqlDependency but it tend to be heavily dependent to SQL (Thus the name). I think its bad practice to have a solution dependent to the database, sooner or later you also want updates from the Domain only etc.
I have made a EventAggregator proxy for signalR that can pick up events decoupled from domain and database. Check it out here
https://github.com/AndersMalmgren/SignalR.EventAggregatorProxy/wiki
Install with nuget
Install-Package SignalR.EventAggregatorProxy
It has both a .NET and javascript client, check the wiki for how to set it up, and here is a demo
https://github.com/AndersMalmgren/SignalR.EventAggregatorProxy/tree/master/SignalR.EventAggregatorProxy.Demo.MVC4
It's true that most of the tutorials demonstrate a chat application, since that's the easiest way to show off the technology. Once you start demonstrating a more complex sample, there are design patterns that don't really have to do with the technology.
Here's a tutorial that demonstrates how to update the client based on changes from a server:
http://www.asp.net/signalr/overview/signalr-20/getting-started-with-signalr-20/tutorial-server-broadcast-with-signalr-20
Here's a demo that uses SqlDependency to update the client:
http://techbrij.com/database-change-notifications-asp-net-signalr-sqldependency
(The above is SignalR 1.0, so see the Updating document for info on how to change it to 2.0):
http://www.asp.net/signalr/overview/signalr-20/getting-started-with-signalr-20/upgrading-signalr-1x-projects-to-20
Related
I'm looking at enterprise JavaFX, and how to integrate JavaFX with server-side code. In the last few weeks I've done a certain amount of research in DataFX and Open Dolphin, and downloaded some videos, as well as looking at a couple of other frameworks. For example I've looked at the video on DataFX at:
https://www.youtube.com/watch?v=EN4fo6x0DcQ
However, although this video and others I've looked at explain how to set up a client application that connects with a server, I've found very little information on how to put together some server-side code that the client can connect to. Sure, one could use JAX-RS, but why re-invent the wheel? In the first instance I would like to put together some really simple server-side code that some test client-side code can connect to using DataFX or one of the other frameworks. The aim eventually is to get a client using JavaFX to communicate with a server.
My second question is that of the various frameworks available, is DataFX the best to use for a simple application?
I have experience with a Glassfish server hosting a JSF application, and it may be useful to have such a server hosting a JSF application communicating with a browser as well as communicating with a client JavaFX, as that way I can test out that the communication with the JavaFX application.
The latter is a bit of an aside, and my main questions are where can I get information on server-side programming for this, and the best frameworks to use?
Many thanks in advance.
If you are able to manage yourself the client-server communication you can pick any JavaFX Application Framework listed there:
https://github.com/mhrimaz/AwesomeJavaFX
Any of them allows to separate UI code from communication code.
As I'm author of JRebirth, I can advice you to create some RemoteService (extends Service and providing JAX-RS facilities or whatever) to perform this job.
If you search an all-in-one library managing client AND server side, DataFX + OpenDolphin is probably the most advanced one.
I'm the author of DataFX & Dolphin Platform (https://github.com/canoo/dolphin-platform). Both are valid frameworks that fill fit to your needs. Maybe a combination of both - Dolphin Platform as remoting layer between client and server and DataFX to define the routing and mvc based views on the client.
Some days ago I copied all the DataFX sources to GitHub (https://github.com/guigarage/DataFX) and currently trying to create a new version based on the modules that are maintained by me. Maybe I will extract the MVC related stuff and create a new framework based in it, we will see. What I currently can say is that I plan to work on it the next month next to the Dolphin Platform since I think a combination of both will be a good fit.
I would use this combination today to create applications but yeah, I'm the main developer of both frameworks so the choice is quite easy for me ;)
As you mentioned JSF I think that Dolphin Platform is a perfect match for you since one idea of the framework is to have a modern successor for JSF that can be used to create desktop & web based applications but provide managed controllers on the server. We provide a cool maven based jumpstart (Maven archetype) that will give you a quick introduction and a runnable client / server application with a desktop and web client in 2 minutes: https://canoo.github.io/dolphin-platform/#_dolphin_platform_jumpstart
Effort:
I am building a word game based on a chat web-client where I need to make a server call on input chat text to validate it before broadcasting on the chat.
I am aware of Meteor providing latency compensation out of the box. But given its still in "early preview" makes me seek other alternatives.
What I tried:
Unfortunately my web search for "latency compensation framework library" doesn't yield anything other than Meteor (including non-personalized results).
Question: Are there any other alternatives that provide latency compensation -or- can make the job easier? I am hoping other developers might have encountered something useful/relevant.
Although Meteor is in 'early preview', its code is very close production ready and a lot of startups and other early adopters are using it for production-level code. You aren't going to find anything that gives you wings like Meteor because no such alternative exists.
As a hardcore Meteor convert and someone who's used many other frameworks, I recommend you to just try Meteor out. As they say, it only takes a weekend for you to build an app in Meteor and decide whether it's right for you.
Having said that, I will attempt to answer the question and list the distant-second alternatives to Meteor that you probably won't want to use:
Derby
Sails
What you're seeing right now in the various real-time full-stack Javascript web frameworks is the future of Web development, cutting down dozens of people and thousands of man-hours of work needed to develop a software project. There are some fast boats sailing that are leaving server-side rendering behind, and you should probably just get in one of them and get going.
RethinkDB uses term 'latency compensation'.
I've also tried to gather per-feature alternatives to Meteor
Meteor is a really cool framework. you can build the complex data driven application very easily using meteor.
But, this framework currently supports only the MongoDB as back-end database.
I have recently created full stack framework called Nooljs which is similar to the Meteor. Now I have open sourced it. It support all the database connections including MySql, ms-sql, and MongoDB. The complex data driven application can be created easily using this framework.
This has been developed using well known existing framework such as Angularjs, Node, express-js, and socket-io.
Easy to build complex data driven JavaScript applications with minimum coding.
Support multiple data connections suck as Ms-sql, MySQL, PostgreSQL, and Mondodb.
Real time framework build top of Express-js and Socket-io
The client side is powered by the Angularjs.
The layout can be build using the Angularjs tags and elements.
Modularized layout to simplify the complex web pages.
Can be mixed both Express-js and Socket-io
So, this does not necessarily have to do directly with the code itself, although it is certainly a component of it.
I recently downloaded and installed the PayFlow Pro SDK for use with ASP.net
link here:
https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/library_download_sdks
I installed this to my development machine. I also came accross this example code which I figured outlined the primary setup for basic Paypal Credit Card Transaction functionality.
link here:
http://www.codeproject.com/KB/aspnet/PayPal_PayflowPro.aspx
Anyways, I have two main questions
Do I have to install the SDK on the web hosts server in order to utilize the functionality of it? This seems to make sense, however, the tutorial in the second link suggests I create a web reference. Unless I am not understanding something here, wouldn't this just strictly work on my development machine, or at least, the functionality of the remote website that references this web reference to access the sdk, would this not be dependent on my computer running and broadcasting this information?
I just need clarification on how to install and/or access the sdk for use on a remote webhosts server (ie. do i need to install the sdk on the web-hosts server and if so, how would one go about doing so (ie. where to install, how to install)?).
Are there any other clean cut examples like my second link provides, that sort of outline the basic functionality of Payflow Pro? I find paypal's examples numerous and convoluted and their online slides/video tutorials to be tedious.
Perhaps I should just get off my lazy ass, but I have found peers from the general community to be much more informative in a way more efficient manner, so any help would be greatly appreciated.
Thanks!
For anyone interested, after enough searching I found a great example that notified me of all the fundamental processes to creating a basic transaction and allowed me the knowledge to further manipulate the sdk.
Check it -
Code Projects PayflowPro example and introduction.
I'm not sure I'm asking the right question here, but I'm looking to provide web based functionality from one ASP.NET application to another remote 'portal-like' application. Is it possible to simply give the portal a DLL? As an example, let's say the SaaS web app has a patient-entry form that I want to be able to use from the portal application. I would like the portal app to be able to set preferences (permissions, color, style, etc), make a function call, and have that capability presented within a certain div or something. Is there any .NET technologies that provide this kind of integration?
EDIT:
Here is a link to a quick diagram I made trying to describe the scenario: http://img.ly/ESG. I know there are other ways of doing this (eg JSON-P calls), but I need to give the portal developers something they can control on their end. Also, if anything changes they'll know I will send them a new version of the DLL which will indicate to them the new functionality.
I'll give you a shopping list of things to check out:
DotNetNuke:
http://www.dotnetnuke.com/
Workflow Foundation -
http://msdn.microsoft.com/en-us/netframework/aa663328.aspx
Microsoft SAAS platform -
http://www.microsoft.com/serviceproviders/saas/default.mspx
Depending on exactly what you're looking for, you might also research "multitenancy".
To answer your original question, yes, you can do it with DLL's, but there are easier ways to do it.
Background:
I am an intermediate web app developer working on the .Net Platform. Most of my work has been defined pretty well for me by my peers or superiors and I have no problem following instructions and getting the job done.
The task at hand:
I was recently asked by an old friend to redo his web app from scratch. His app is extremely antiquated and he is getting overwhelmed by it breaking all the time. The app in question is an inventory / CRM application and currently each customer requires a new install of the app (usually accomplished by deploying it on a different domain on the same server and pointing to a new database).
Currently if any client wants any modifications to the forms such as additional fields, new features, etc my friend goes in and manually adds those fields to the forms, scripts, database etc. As a result all installs of this application are unique. There is no one singular source repository and no one single version of this app. Generally new features are overtime rolled into the other sites, but still this is done on an individual site by site basis.
I will be approaching this on a very modular basis. Initially I will be coding a module that will query an external web service for some data, display and store it, and periodically update it automatically. The next module will likely be for storing and displaying inventory data. This way I want to over time duplicate the current feature set of his app 100% but do it incrementally.
The Million Dollar Questions
I want to make the app have user
configurable form fields. The user
should be able to go to an admin
page, create a new forms page of a
certain category, and then specify
what fields he wants in there. He
could say 'create a new text field
called Item # and make it a
requirement" and that will get
stored somewhere. All forms will be
dynamically rendered to screen based
on what the user has configured. Is
this a good way to go about the
problem of having no idea what a
customer could want in a form? and
thus be able to store and display
form data of any sort ? What sort of
design pattern should I follow here?
I am familiar with asp.net and
the .net framework in general and
have decent knowledge of javascript,
html, silverlight, jquery, c# etc
etc. I can work my way around web
apps in a good way, but I am not
sure what sort of framework or tech
I should use to accomplish this
task. Would ASP.net 3.5 webforms be
the way to go? or should I look into
ASP.NET MVC? Do I use jquery and ajax for
complete decoupling of frontend and
backend ? or will a normal asp.net
page with some spattering of ajax
thrown in working with a codebehind
be the order of the day?
Just looking for general advice before I start.
I am currently thinking of using ASP.NET 3.5 webforms, jquery for clientside animation, ui, manipulation and data validation, and sqlserver + a .net or wcf webservice for backend.
Your advice is much appreciated as always.
I've recently implemented a white-label ecommerce system for an insurance company that allowed each partner to choose their own set of input fields, screens, and order the flow of the application to suit their individual needs.
Although it wasn't rocket science, it added complexity and increased development time.
Consider the user configuration aspect very carefully In hindsight both my client and their clients in turn, would have been happy with a more rigid system.
As for the tech side of your question, I developed my project in VS2005, using asp.net webforms and webservices with a SQLserver back end, so the stack that you're looking at is definitely capable of delivering a working product. ASP.net MVC will almost certainly help as far as testability goes.
The biggest thing I would change now if I was going to start again would be to replace the intermediate webservices with message based services using nServiceBus, MassTransit or the like. While the webservices worked fine, message based communication should be quicker and more reliable.
Finally, before you start to code, make sure that you understand the current system's functionality inside and out. If the new system doesn't do something that the old system did, it will be pretty obvious to the end users straight away.