DevExtreme - DevExtreme.AspNet.Data processing and serialization now use System.Text.Json (previously Newtonsoft.Json)

What Changed

DataSourceLoadOptionsParser used Newtonsoft.Json library to deserialize data processing settings. This functionality is now handled by the Microsoft System.Text.Json library.

Previously:

• The JsonProperty / DefaultValueHandling.Ignore attribute from Newtonsoft.Json was used to decorate result classes from DevExtreme.AspNet.Data.ResponseModel.
• It ignored default property values of classes from DevExtreme.AspNet.Data.ResponseModel.
• This only happened if serialization was executed by Newtonsoft.Json.

Now:

• The JsonIgnore / JsonIgnoreCondition.WhenWritingDefault attribute from System.Text.Json is used to ignore default property values of classes from from DevExtreme.AspNet.Data.ResponseModel.
• This only takes effect if serialization is done by System.Text.Json.

Reasons for Change

• Microsoft designed System.Text.Json for security standard compliance (the RFC 8259 specification) and performance (both faster and lower memory allocation).
• Microsoft uses System.Text.Json in many their products since the release of ASP.NET Core 3.0 and also recommends it as a long-term solution for .NET developers. For more information, please refer to Overview | Migrate from Newtonsoft.Json to System.Text.Json.
• Microsoft supports System.Text.Json for .NET 6+ and .NET Framework 4.6.2+ apps. This support allows us to use this library across a wide range of DevExpress libraries/components.

Impact on Existing Apps

The population of DataSourceLoadOptionsBase.Filter (from serialized strings values) might behave differently due to how System.Text.Json and Newtonsoft.Json handle built-in .NET primitive types differently.

How to Update Existing Apps

Remove the Newtonsoft.Json dependency from the project if it was added explicitly.