Update Many Documents
You can update more than one document using the UpdateMany() method on
a collection object.
Example
The following code updates all documents in the restaurants collection that have a
cuisine field with the value of "Pizza". After the update, these documents will
have a cuisine field with a value of "Pasta and breadsticks".
Select the Asynchronous or Synchronous tab to see the corresponding code.
const string oldValue = "Pizza"; const string newValue = "Pasta and breadsticks"; // Creates a filter for all documents with a "cuisine" value of "Pizza" var filter = Builders<Restaurant>.Filter .Eq(restaurant => restaurant.Cuisine, oldValue); // Creates instructions to update the "cuisine" field of documents that // match the filter var update = Builders<Restaurant>.Update .Set(restaurant => restaurant.Cuisine, newValue); // Updates all documents that have a "cuisine" value of "Pizza" return await _restaurantsCollection.UpdateManyAsync(filter, update);
For a fully runnable example of the UpdateManyAsync() operation, see the
UpdateManyAsync code sample.
const string oldValue = "Pizza"; const string newValue = "Pasta and breadsticks"; // Creates a filter for all documents with a "cuisine" value of "Pizza" var filter = Builders<Restaurant>.Filter .Eq(restaurant => restaurant.Cuisine, oldValue); // Creates instructions to update the "cuisine" field of documents that // match the filter var update = Builders<Restaurant>.Update .Set(restaurant => restaurant.Cuisine, newValue); // Updates all documents that have a "cuisine" value of "Pizza" return _restaurantsCollection.UpdateMany(filter, update);
For a fully runnable example of the UpdateMany() operation, see the
UpdateMany code sample.
Expected Result
Running either of the preceding full examples prints the following results:
Restaurants with cuisine "Pizza" found: 1163 Restaurants modified by update: 1163 Restaurants with cuisine "Pasta and breadsticks" found after update: 1163 Resetting sample data...done.
More Information
To learn more about updating documents, see the Update Many guide.
To learn more about using builders, see Operations with Builders.