Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 7 years ago.
Improve this question
I have an asp.net c# website which members complete a form which is stored in sql server. After 24 hrs, I would like to send a notification to a specific group of users if the form status has NOT changed. Is this achievable from within asp.net?? Any help is appreciated
I have done it several times and there are many ways to do it. One simple way is to check every X minutes if you need to send any notifications. If so, you send them.
For example: every 60 minutes you check if there are any forms that have been on the same status for 24hs. If so, you send a notification.
If you have full control of the server, I would recommend you to create a Windows Service to perform this job. ASP.NET was not built for long running tasks so that's why I'm suggesting to create a Windows Service.
One more thing, create a log table for this task so every time you send a notification, you add a row on that table. That's gonna help you debug any issues you might have. Also, remember to mark the rows where you have already notified the customer to avoid sending a notification twice. I always like to add a double check before sending the notification.
Related
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 3 years ago.
Improve this question
I display some of the data i.e. Sum, Average and Total on a page and want to update them after the data changed using SignalR. Most of the examples uses the following approach that broadcast all of the clients after create / update / delete methods (that change data) are executed:
private void BroadcastDataChange(Data data)
{
Clients.All.dataChanged();
}
However, I am wondering if there is a smarter approach that let me update the data i.e. periodically refreshing without broadcast in each of the create-update-delete methods (I do not use SqlDependency, etc, juts using SignalR). On the other hand, I am not sure this kind of approach is contradictory to the SignalR logic. This is the first time I use SİgnalR and I am too confused :( Any help would be appreciated.
You can use polling with SignalR. It's just an inefficient way of doing things though, because: (1) there would be a delay between when changes happen and when they are broadcast to clients. (2) broadcasts would happen even if data didn't change, which is a waste of resources.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 4 years ago.
Improve this question
Is there a way to have a session send and receive data in intervals even after the user has closed their browser? We have members that signup and sometimes not receive a confirmation code due to a lost request to retrieve that code from our server that generates it.
My thought is to have the session try to retrieve that code for up to 4 hours in 30 minute intervals. If not, it will send an email to the member letting them know they need to signup again.
Is this possible with sessions? We are using .NET
Due to the nature of the web being disconnected you web pages/views should should show data and post data back back on user interaction where the the most immediate functions do what they need to do quickly. For instance if a user signs up to your service they are presented with a signup page, when the commit that page their details should be saved any further actions should not be done on that page and any operation needs to assume that browser could close at any time. If a user submits the signup form you should save their details.. anything else like email notifications etc should happen after that. To enable this simply, you could use something like HangFire (https://www.hangfire.io) to monitor signups and send emails using a background process.. (you could trigger this at the time as part of your signup method or have a recurring task to check signups) the key point being that the long running task like constructing and sending an email will be done outside the page request.
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 5 years ago.
Improve this question
I would like to create an event in c# that it triggers when a new record is inserted in a mysql table. I want to avoid to do polling the table every time.
Do you think it is possible?
Thanks in advance
A DBMS such as MySQL is a multi user system, as such then only the database itself knows when data is inserted.
MySQL supports triggers which allow you to perform an action when some data is read, inserted, updated, deleted from a table.
Typically this is done to perform a similar action upon other tables in the system, but MySQL does support a feature known as UDF - User Defined Functions which will allow you to call external programs from the trigger.
I have not done this myself and only know the theory, but if you search for UDF for MySQL then I'm sure you can find some examples.
Here are some examples:
http://crazytechthoughts.blogspot.de/2011/12/call-external-program-from-mysql.html
Calling an url from a trigger in mysql
You can then use this to interact with your program. But be careful with performance as the trigger is called synchronously.
It might be an idea to get the trigger to send a message via message bus, which you program can then listen for.
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 8 years ago.
Improve this question
I have a website which have more than 1000 users. I want to update the content of my site in every 10 sec.
Suppose if one user update anything in a table so it will reflect to other logged in user. But remember the user is ideal.
He doesn't press refresh on his browser.
I think of applying auto-refresh in every 10 sec through jquery which call the ajax post and gets back the
updated result. But with my approach if 1000 users are online so my server will be hit by 1000 times. I want some optimized way to do this. Any suggestions
Setup ajax push instead:
have the browser invoke a remote function on load.
Then on the server wait for an event (new information to send out) then return it to the browsers. This may be easiest with node.js.
You will have to handle connections dropping depending on the reliability you want to implement.
Here's a discussion of Ajax push with php:
Ajax push system
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 5 years ago.
Improve this question
I had made a site for client in which users can make request for songs, there's a database having songname, by whom, written by, sang at etc. The site is hosted and working fine.
The way the admin gets to know what is asked for is by using the website but now he wants that there be a desktop application which displays all the requests so he does not have to log in and use the website
I do have an idea to get this done, but I am hoping for a well known established way. I am using C# asp.net.
I think you can create an Http Handler. This handler will listen to the request and you can log them in a database, and the windows application will read from the database.
You can simply use Timer in windows application.
Set your Timer to either 1 min or 2 min as per your need.and on its Tick event you check the live database whether is there any new request come or not..
If new request come then you can show some notification or something like this...