« Mongodb and csharp » : différence entre les versions
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[[Category:.NET]] | [[Category:.NET]] | ||
= Links = | |||
* [https://www.mongodb.com/developer/languages/csharp/using-linq-query-mongodb-dotnet-core-application Using LINQ to Query MongoDB in a .NET Core Application] | |||
* [https://www.mongodb.com/developer/languages/csharp/create-restful-api-dotnet-core-mongodb Create a RESTful API with .NET Core and MongoDB] | |||
* [https://www.mongodb.com/developer/languages/csharp/joining-collections-mongodb-dotnet-core-aggregation-pipeline Joining Collections in MongoDB with .NET Core and an Aggregation Pipeline] | |||
* [https://www.mongodb.com/developer/languages/csharp C# and MongoDB] | |||
= Access to a collection = | = Access to a collection = | ||
<kode lang='cs'> | <kode lang='cs'> | ||
Version du 15 avril 2024 à 08:55
Links
- Using LINQ to Query MongoDB in a .NET Core Application
- Create a RESTful API with .NET Core and MongoDB
- Joining Collections in MongoDB with .NET Core and an Aggregation Pipeline
- C# and MongoDB
Access to a collection
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var mongoClient = new MongoClient("MONGODB_CONNECTION_STRING");
var database = mongoClient.GetDatabase("DB_NAME");
var collection = database.GetCollection<Collection>("COLLECTION_NAME");
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Filter
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var builder = Builders<MyClass>.Filter;
FilterDefinition<MyClass> filter = filterDefinition.Empty;
filter &= builder.Eq(x => x.Property1, "id");
filter &= builder.In(x => x.Property1, new[] { "id1", "id2" }); // filter by Property1 equals to one of the ids
var result = (await collection.FindAsync(filter)).ToList();
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Pipeline
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var stages = new BsonDocument[]
{
MatchStage(getTimeSeriesQuery),
ProjectionStage(),
SortStage()
};
var pipeline = PipelineDefinition<InputClass, OutputClass>.Create(stages);
var results = (await myCollection.AggregateAsync(pipeline)).List();
BsonDocument MatchStage(GetTimeSeriesQuery getTimeSeriesQuery)
{
var match = new BsonDocument("property1", "value1");
if (!string.IsNullOrEmpty(variable2))
{
match.AddRange(
new BsonDocument("property2", variable2)
);
}
return new BsonDocument("$match", match);
}
BsonDocument ProjectionStage() =>
new BsonDocument(
"$project",
new BsonDocument
{
{ "_id", 0 },
{ "property1", 1 },
{ "property2", 1 }
}
);
BsonDocument SortStage() =>
new BsonDocument("$sort", new BsonDocument("timestamp", 1));
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Log
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var mongoUrl = new MongoUrl("MONGODB_CONNECTION_STRING");
var mongoClientSettings = MongoClientSettings.FromUrl(mongoUrl);
mongoClientSettings.ClusterConfigurator = cb =>
{
cb.Subscribe<CommandStartedEvent>(e =>
{
logger.LogTrace($"{e.CommandName} - {e.Command.ToJson()}");
});
};
this.mongoClient = new MongoClient(mongoClientSettings);
|
Configure the Log so it will be displayed in Visual Studio Output Debug window.
