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Usage Examples

Update Many Documents

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  • Example
  • Expected Result
  • More Information
  • API Documentation

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);
var update = Builders<Restaurant>.Update
    .Set(restaurant => restaurant.Cuisine, newValue);
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);
var update = Builders<Restaurant>.Update
    .Set(restaurant => restaurant.Cuisine, newValue);
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 Modify Documents guide.

To learn more about using builders, see Operations with Builders.

API Documentation

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Update a Document