how to get alert in c# windows application

Question

Hi I am developing windows application with MDI form. if multiple user is using the applicaiton and any change made by the one usershould be reflected as alert for another user while working in application immediately. Both user using the same applicaiton with seperate instance. Please help me sir. Thanks and regards Ram

Tapan Patel · Answer

considering the use is making the change and you want to have it detected (probably database changes) you should go for SQL Dependency. https://msdn.microsoft.com/en-us/library/62xk7953(v=vs.110).aspx All what you want to do is to have the code for sql dependency in various places as required and it should be pretty much it.

Amit Gupta · Answer

Agreed with Nitin sir but if you are working with file system or standalone database file you can use FileSystemWatcher class that monitors and change/deletion in the file. It notifies only outer region not internal change. Hope it helps :)

Ranjit Powar · Answer

For displaying messages you can use MessageBox.

Nitin Sontakke · Answer

Slightly complicated. First where are you expected to observe the change? That is a very important question. Obviously the place must be the one which is accessible to all for example database. Secondly you will probably need a thread running apart from your usual form showing thread which will keep on looking for the change and raise alert at an appropriate time. SignalR is the technology which provides this kind of mechanism which you may look into.