Data Validation in CosmosDB with .NET

Syntax

public static void Validate<T>(T document, bool throwExceptionOnInvalid)

Example

using Microsoft.Azure.Cosmos;

public class Account
{
    [JsonProperty(PropertyName = "id")]
    public string Id { get; set; }

    [JsonProperty(PropertyName = "accountType")]
    public string AccountType { get; set; }

    [Required]
    [JsonProperty(PropertyName = "ownerName")]
    public string OwnerName { get; set; }

    [JsonProperty(PropertyName = "balance")]
    public double Balance { get; set; }
}

var client = new CosmosClient("<connection-string>");
var container = client.GetContainer("<database-name>", "<container-name>");

var account = new Account
{
    AccountType = "Savings",
    OwnerName = "John Doe",
    Balance = 5000.00
};

container.Validate(account, true);

Output

If throwExceptionOnInvalid is set to true, the method will throw an exception with the details of validation errors. If it is set to false, the method will return a boolean value indicating whether the document is valid or not.

Explanation

Data validation is an important step in any application to ensure that the data being saved to the database is valid and can be used by the application without any issues. CosmosDB provides a way to validate data using the Validate<T> method on a container.

The Validate<T> method takes two parameters: the document to be validated and a boolean value indicating whether to throw an exception on validation errors. The Required attribute can be used to mark properties that must have a value in the document.

Use

Use this feature to validate data before saving it to the database to ensure that the data is valid and can be used by the application without issues.

Important Points

• Data validation can help prevent invalid data from being saved to the database.
• Use the Required attribute to mark properties that must have a value in the document.
• The Validate<T> method can be used to validate data before saving it to the database.

Summary

In this tutorial, we learned about data validation in CosmosDB with .NET. We explored the syntax and example of validating data in CosmosDB using the Validate<T> method. We also discussed the importance of data validation and some important points to keep in mind while using this feature.