Introduction

In this guide, you'll learn how to integrate MongoDB with C# applications using .NET. MongoDB is a flexible NoSQL database, and .NET is a versatile framework for building C# applications. We'll cover the basics of connecting to MongoDB, performing CRUD (Create, Read, Update, Delete) operations, and using the official MongoDB C# driver. Sample code and examples will guide you through the integration process.

Prerequisites

Before you begin, make sure you have the following prerequisites:

• A development environment for .NET applications, such as Visual Studio or Visual Studio Code.
• The official MongoDB C# driver installed. You can add it to your project using NuGet.
• MongoDB installed and running locally or accessible through a connection string.

Step 1: Connecting to MongoDB

Begin by connecting your C# application to MongoDB. You'll need to specify the connection URL and database name. Here's an example:

using MongoDB.Driver;
// MongoDB connection URL
string connectionString = "mongodb://localhost:27017";
// Create a MongoDB client
IMongoClient client = new MongoClient(connectionString);
// Choose a database (replace 'mydb' with your database name)
IMongoDatabase database = client.GetDatabase("mydb");
        

Step 2: Performing CRUD Operations

You can now perform CRUD operations on your MongoDB database using C# and the MongoDB driver. Here are some basic examples:

Create (Insert) Data

using MongoDB.Bson;
using MongoDB.Driver;
// Choose a collection (replace 'mycollection' with your collection name)
IMongoCollection<BsonDocument> collection = database.GetCollection<BsonDocument>("mycollection");
// Create a new document
var document = new BsonDocument
{
    {"name", "John Doe"},
    {"email", "john@example.com"}
};
// Insert the document
collection.InsertOne(document);
        

Read (Query) Data

// Find documents that match a filter
var filter = Builders<BsonDocument>.Filter.Eq("name", "John Doe");
var result = collection.Find(filter).ToList();
        

Update Data

// Update a document
var updateFilter = Builders<BsonDocument>.Filter.Eq("name", "John Doe");
var update = Builders<BsonDocument>.Update.Set("email", "new_email@example.com");
collection.UpdateOne(updateFilter, update);
        

Delete Data

// Delete a document
var deleteFilter = Builders<BsonDocument>.Filter.Eq("name", "John Doe");
collection.DeleteOne(deleteFilter);
        

Conclusion

You've successfully integrated MongoDB with your C# application using .NET. This guide covers the basics of connecting to MongoDB, performing CRUD operations, and using the official MongoDB C# driver. With these foundational skills, you can explore more advanced MongoDB and .NET features and develop C# applications that interact with MongoDB databases.