You can use the following code to modify a particular element within a nested array using the Mongo C# driver.
var collection = db.GetCollection<YourModel>("YourCollection");
var filter = Builders<YourModel>.Filter.Eq("_id", new ObjectId("ObjectIdHere"));
var update = Builders<YourModel>.Update.Set("YourArray.$[i].PropertyName", "NewValueHere");
// Replace 'i' with the index of the element you want to modify in the array
var options = new UpdateOptions { ArrayFilters = new List<ArrayFilterDefinition> { new BsonDocumentArrayFilterDefinition<BsonDocument>(new BsonDocument("i", index)) } };
var result = await collection.UpdateOneAsync(filter, update, options);
In this code, YourModel
is the model class for your collection and YourCollection
is the name of your collection in the database.
The Filter
variable selects the document that contains the nested array you want to modify. The Update
variable specifies the modification you want to make to the element of the array.
The ArrayFilters
variable provides a way to filter the nested array elements. In this example, we are filtering by the index of the element we want to modify, which we pass in as a parameter.
Finally, you call UpdateOneAsync
on your collection with the filter, update, and options variables, which will modify the selected element of your array.
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Asked: 2023-05-17 23:39:18 +0000
Seen: 7 times
Last updated: May 17 '23
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