How to fliter a collection using VB.Net

[Mark Lambie]

Anyone have samples of filtering collections using VB.net.

[Wan Bachtiar]

Hi Mark,

Check out the MongoDB C# Driver Quick Tour, the VB.net examples should be similar to some of the examples there.

Below is a simple example on how to query a collection in VB to get you started:

Imports MongoDB.Bson
Imports MongoDB.Driver

Module QueryExample
    Sub Main()

        Dim client = New MongoClient("mongodb://localhost:27017")
        Dim db = client.GetDatabase("dbName")
        Dim collection = db.GetCollection(Of BsonDocument)("collectionName")

        'Find the first or default from the collection'
        Dim document = collection.Find(New QueryDocument()).FirstOrDefault()
        Console.WriteLine(document.ToString())

        'Find all documents from collection matching field=value'
        Dim documents = collection.Find(New QueryDocument("field", "value"))
        For Each doc As BsonDocument In documents.ToList()
            Console.WriteLine(doc.ToString())
        Next

    End Sub
End Module

The snippet above is written using mongocsharpdriver-2.2.3 and .NET v4.5.2

Best regards,

Wan.

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