C# 为什么字符串是'；axios中的s参数为空？

我在axios中向api发送一个参数，然后运行linq以获得结果

不幸的是，当涉及到api中的函数时，我得到了null值

我错在哪里

守则：

react:
 const code= "sdasdasdadad"
        axios.post('api/UserDetails/', code).then((response) => setUserDetails(response.data));

---

如果您真的希望您的API能够很好地处理纯文本输入，您可以尝试实现自定义纯文本输入格式化程序，如下所示

public class TextPlainInputFormatter : TextInputFormatter
{
    public TextPlainInputFormatter()
    {
        SupportedMediaTypes.Add("text/plain");
        SupportedEncodings.Add(UTF8EncodingWithoutBOM);
        SupportedEncodings.Add(UTF16EncodingLittleEndian);
    }

    protected override bool CanReadType(Type type)
    {
        return type == typeof(string);
    }

    public override async Task<InputFormatterResult> ReadRequestBodyAsync(InputFormatterContext context, Encoding encoding)
    {
        string data = null;
        using (var streamReader = new StreamReader(context.HttpContext.Request.Body))
        {
            data = await streamReader.ReadToEndAsync();
        }
        return InputFormatterResult.Success(data);
    }
}

API行动

使用axios发出请求

测试结果

---

axios.post的第二个参数必须是JS对象如果我只想发送一个字符串怎么办？怎么写？看一看

public class TextPlainInputFormatter : TextInputFormatter
{
    public TextPlainInputFormatter()
    {
        SupportedMediaTypes.Add("text/plain");
        SupportedEncodings.Add(UTF8EncodingWithoutBOM);
        SupportedEncodings.Add(UTF16EncodingLittleEndian);
    }

    protected override bool CanReadType(Type type)
    {
        return type == typeof(string);
    }

    public override async Task<InputFormatterResult> ReadRequestBodyAsync(InputFormatterContext context, Encoding encoding)
    {
        string data = null;
        using (var streamReader = new StreamReader(context.HttpContext.Request.Body))
        {
            data = await streamReader.ReadToEndAsync();
        }
        return InputFormatterResult.Success(data);
    }
}

services.AddControllers(opt => opt.InputFormatters.Insert(0, new TextPlainInputFormatter()));

[Microsoft.AspNetCore.Mvc.Route("UserDetails")]
[Microsoft.AspNetCore.Mvc.HttpPost]
public Users UserDetails([FromBody]string code)
{

    //...

const code = "sdasdasdadad";

const headers = {
    'Content-Type': 'text/plain'
};

axios.post('api/UserDetails', code, { headers: headers }).then((response) => setUserDetails(response.data));