错误：解析值时遇到意外字符：{ using .NET core 3

Question

我不明白为什么会出现错误“解析值时遇到意外字符：{”？

我的启动配置：

public void ConfigureServices(IServiceCollection services)
{
    ...

    services.AddControllers().AddNewtonsoftJson(opts => {
            opts.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
        }
    );
}

我的控制器：

[HttpPost("{accountId}/top-up")]
public async Task<IActionResult> TopUp([FromBody] decimal amount, [FromRoute] int accountId)
{
    //...
}

Answer 1

参数与你传入的数据不匹配

// param [FromBody] decimal amount

比赛

100

---

public class Foo {
 public decimal Amount { get; set; }
}
//param [FromBody]Foo model

比赛

{
 "amount":100
}