I want to make a background running desktop app using asp.net c#.
The idea is to check a local database table and get all data from that table in order to insert all those data in live database table.
If there is any better solution for that scenario please suggest me one.
It seems that what you want to solve is moving data from multiple local databases into a central one so you can consume it via an asp.net website. I won't be discussing application part since that's an easy problem to solve once you can connect to a db that has all the data you need.
There are several things to consider here:
Data Contract (do local databases have same or different schema than central database)
The Data Contract is your biggest problem if schemas are different since you will need to design at least a target schema for the central database that can take in data from local dbs. Even if schemas are identical, you will need to devise a way that data is partitioned in central database, you might need to introduce a sourceDatabaseId column in your tables so you won't have conflicting primary keys (you won't have this problems if your primary keys are guids)
The others can be solved either building:
You would set up one such windows service or scheduled console app per local database.
If you have complex databases you can look into tools like Microsoft Sync Framework to perform this data synchronization.
您可以开发Windows服务来执行此类工作,并通过计时器设置将其安装在服务器上。
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