如何从 .NET Core 3.1 中的 JSON object 反序列化浮点数据类型

Question

I am trying to pass the below JSON object to an.NET Core 3.1 API endpoint that accepts an object of type Order.

{ 
"OrderType" : "Sale",
    "Total" : "100"
}

public class Order (){
public string OrderType {get; set;}
public float Total {get;set;}
}

This is giving me the below error. How can I fix this.

Error: "The JSON value could not be converted to System.Single. Path: $.Total | LineNumber: 2 | BytePositionInLine: 21."

Answer 1

ASP.Net core 3.1 does not use Newtonsoft.JSON for serialization, it uses its own serializer System.Text.Json.

If you want to use Newtonsoft.JSON in ASP.NET core 3.1,

• download Microsoft.AspNetCore.Mvc.NewtonsoftJson from NuGet package.
• In Startup.cs replace services.AddControllers(); with services.AddControllers().AddNewtonsoftJson();

You can refer to the below blog for more details on System.Text.Json

https://devblogs.microsoft.com/dotnet/try-the-new-system-text-json-apis/