« Mongodb and csharp » : différence entre les versions

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(Page créée avec « Category:.NET = Filter = <kode lang='cs'> var builder = Builders<MyClass>.Filter; var filter = builder.In(x => x.Property1, Ids); // filter by Property1 in the Ids list </kode> »)
 
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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 =
<kode lang='cs'>
var mongoClient = new MongoClient("MONGODB_CONNECTION_STRING");
var database = mongoClient.GetDatabase("DB_NAME");
var collection = database.GetCollection<Collection>("COLLECTION_NAME");
</kode>
= Filter =
= Filter =
<kode lang='cs'>
<kode lang='cs'>
var builder = Builders<MyClass>.Filter;
var builder = Builders<MyClass>.Filter;
var filter = builder.In(x => x.Property1, Ids); // filter by Property1 in the Ids list
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();
</kode>
 
= Pipeline =
<kode lang='cs'>
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));
</kode>
 
= [https://stackoverflow.com/questions/30333925/how-do-i-log-my-queries-in-mongodb-c-sharp-driver-2-0 Log] =
<kode lang='cs'>
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);
</kode>
</kode>
Configure the [[Asp.net_core_7#Log|Log]] so it will be displayed in Visual Studio Output Debug window.

Version du 15 avril 2024 à 08:55

Links

Access to a collection

Cs.svg 
var mongoClient = new MongoClient("MONGODB_CONNECTION_STRING");
var database = mongoClient.GetDatabase("DB_NAME");
var collection = database.GetCollection<Collection>("COLLECTION_NAME");

Filter

Cs.svg 
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();

Pipeline

Cs.svg 
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));

Log

Cs.svg 
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.

Récupérée de « http://wiki.bananeatomic.fr/index.php?title=Mongodb_and_csharp&oldid=30430 »