How to Dynamically Switch Databases in Entity Framework at Runtime?

Dynamic Database Switching in Entity Framework

Managing multiple databases within a web API requires efficient runtime connection switching. This solution details how to achieve this:

• Connection String Generation: Utilize SqlConnectionStringBuilder and EntityConnectionStringBuilder to construct the appropriate connection string.
• Modifying the Data Context Connection: The ChangeDatabase extension method (from the ConnectionTools class) allows for dynamic alteration of the data context's connection:

<code class="language-csharp">// Dynamically switch the database connection
var selectedDb = new MyDbEntities();
selectedDb.ChangeDatabase(initialCatalog: "new_catalog", userId: "new_user");</code>

• Connection Scope: In a web API, each request typically operates within its own session. Consequently, the connection string isn't persistent across a user's entire interaction. It's essential to supply the connection string to your data context with each individual request.

The above is the detailed content of How to Dynamically Switch Databases in Entity Framework at Runtime?. For more information, please follow other related articles on the PHP Chinese website!