I am trying to traverse into a MongoDB Collection of the form :
{"_id":"lkashfhasdfhsdlafhlkjsdahf",
"
"Array":[{
"array_1":"17:00"}],
}
I want to get the array_1 in the document above I tried it using the following code in C#
result = Database.CollectionName.AsQueryable().Where(r => r.Array.array== array_inpit(Input) && condition2).ToList();
Expected Result : All the documents with the matching Array
Current Output : Error
Any help how should i proceed with this.
Basic example using the MongoDb.Driver package. You'll need some data types defined, something like:
// Use [BsonIgnoreExtraElements] attribute when not defining ALL fields in record
internal class MainRecord
{
public ObjectId _id { get; set; }
public List<ArrayItem> ResourceStatus { get; set; }
// All the other fields here
}
// [BsonIgnoreExtraElements] as above
internal class ArrayItem
{
public string E2EId { get; set; }
}
(Note - I've omitted all the fields not required to do the array search).
Then to actually query the data:
var client = new MongoClient();
IMongoDatabase db = client.GetDatabase("database-name-here");
var collectionName = "collection-name-here";
IMongoCollection<MainRecord> collection = db.GetCollection<MainRecord>(collectionName);
var filter = Builders<MainRecord>.Filter.ElemMatch(x => x.ResourceStatus, x => x.E2EId == "1fdsfsfsfsfsffds0");
var result = collection.Find(filter);
EDIT: And I'd recommend looking at this post which gives some alternative approaches.
I create simple classes do demonstrate how to:
MongoDB Class
public class MongoDBConnect : IDisposable
{
public IMongoClient client;
public IMongoDatabase database;
public MongoDBConnect()
{
client = new MongoClient("mongodb://localhost");
database = client.GetDatabase("dbo");
}
public void Dispose()
{
GC.WaitForPendingFinalizers();
GC.Collect();
}
}
Your Collection Class
public class YourCollection
{
[BsonId()]
public ObjectId Id { get; set; }
[BsonElement("YourCollectionID")]
public string YourCollectionID { get; set; }
[BsonElement("AccessKey")]
public string AccessKey { get; set; }
}
Your Collection Data Class
public class YourCollectionDAO : MongoDBConnect
{
public YourCollectionDAO()
{
}
public YourCollection Find(string yourCollectionID)
{
var collection = this.database.GetCollection<User>("YourCollection");
Expression<Func<YourCollection, bool>> filter = x => x.yourCollectionID == yourCollectionID;
IList<YourCollection> filtering = collection.Find(filter).ToList();
var yourCollectionItem = filtering.Where(x => x.yourCollectionID == yourCollectionID).FirstOrDefault();
return yourCollectionItem;
}
}
Hope it helps.
