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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.

The examples on this page use the following Restaurant, Address, and GradeEntry classes as models:

public class Restaurant
public ObjectId Id { get; set; }
public string Name { get; set; }
public string RestaurantId { get; set; }
public string Cuisine { get; set; }
public Address Address { get; set; }
public string Borough { get; set; }
public List<GradeEntry> Grades { get; set; }
public class Address
public string Building { get; set; }
public double[] Coordinates { get; set; }
public string Street { get; set; }
public string ZipCode { get; set; }
public class GradeEntry
public DateTime Date { get; set; }
public string Grade { get; set; }
public float Score { get; set; }


The documents in the restaurants collection use the camel-case naming convention. The examples in this guide use a ConventionPack to deserialize the fields in the collection into Pascal case and map them to the properties in the Restaurant class.

To learn more about custom serialization, see Custom Serialization.

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.

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.

To learn more about updating documents, see the Modify Documents guide.

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

  • UpdateMany()

  • UpdateManyAsync()

  • UpdateOptions

  • UpdateResult

←  Update a DocumentReplace a Document →
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