Using MongoDB with .NET

MongoDB is a NoSQL database that stores data in flexible, JSON-like documents. This lesson covers how to integrate MongoDB with a .NET application using the official MongoDB driver.

To use MongoDB with .NET, you need to install the MongoDB.Driver package.

The following command installs the MongoDB driver via NuGet:

Install-Package MongoDB.Driver

To connect to a MongoDB database, follow these steps:

1. Import the necessary namespaces:

using MongoDB.Driver;

2. Define the connection string:

var connectionString = "mongodb://localhost:27017";

3. Create a MongoClient instance:

var client = new MongoClient(connectionString);

4. Get a reference to the database:

var database = client.GetDatabase("mydatabase");

Common operations include:

• Insert:

var collection = database.GetCollection("mycollection");
var document = new BsonDocument { { "name", "Alice" }, { "age", 25 } };
await collection.InsertOneAsync(document);

• Find:

var result = await collection.Find(new BsonDocument()).ToListAsync();

• Update:

var filter = Builders.Filter.Eq("name", "Alice");
var update = Builders.Update.Set("age", 26);
await collection.UpdateOneAsync(filter, update);

• Delete:

await collection.DeleteOneAsync(filter);

Here are some best practices when using MongoDB with .NET:

• Use indexes to improve query performance.
• Keep documents small to optimize read and write operations.
• Utilize asynchronous APIs for improved responsiveness.
• Regularly monitor performance and adjust indexes as necessary.