Why Use One DbContext Per Web Request in Your Application?

Each web request to use a DBCONTEXT: Detailed reason

In web applications, each web requests using a single DBContext instance has a significant advantage:

Advantages:

concurrent request management:

Make sure that each web request only uses a DBContext instance to prevent conflicts and data damage.

• Affairs isolation: It will be changed in a single request to ensure data integrity and consistency.
Reduce the old data:
• By using the new DBContext for each request to avoid the old data cache. Automatic dependency item management:
When using DI framework, the DBCONTEXT instance will automatically manage, simplify dependency injection and reduce code complexity.
• This method applicable scene:
• In the following circumstances, this method is particularly effective:

Multiple users access the database at the same time.

Data transactions need to be isolated to maintain accuracy.

Applications need to process a large number of concurrent requests.

Compared with the instance of the transient DBContext:
• Although each resource library method calls a new DBContext that can work, compared with each request of a DBContext method, it has some disadvantages:
Manual change tracking:

Need to display context.savechanges (), adding complexity and potential errors.

Entity isolation: Sharing entities between objects, leading to performance overhead and complication of code.

Manual release:

The DBCONTEXT instance needs to be explicitly released, which may cause resource leakage.

• Implementation plan:
• DBCONTEXT factory: Inject a factory injecting a new DBContext instance to provide explicit control over the context life cycle.
• DBContext in each request range: Use the DI framework to manage the life cycle of DBContext in the web request, and automatically execute dependency injection and release.
The transaction command processing program decoration device:

Decorative command processing program to automatically submit changes and release DBCONTEXT within the scope of predetermined to simplify the basic structure code.

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