Aps.net 核心 Razor 页面 [FromBody] Ajax post 模型始终为空

Question

在 Asp.Net 核心中，我有一个剃刀页面，我想将 Ajax post 发送到 Post 方法，但我总是得到 null model.here 是我的简化问题。

public class IndexModel : PageModel
{
    public void OnPost([FromBody]A A)
    {
        if (ModelState.IsValid)
        {

        }
    }
}

这是我的模型：

[JsonObject(MemberSerialization.OptOut)]
public class A
{
    [JsonProperty]
    public string Id { get; set; }
    [JsonProperty]
    public string CityId { get; set; }
    [JsonProperty]
    public string Infected { get; set; }
    [JsonProperty]
    public string Susceptible { get; set; }
    [JsonProperty]
    public string Recovered { get; set; }
    [JsonProperty]
    public string CityName { get; set; }
}

这是我的 Ajax 请求：

function f(event) {
    var token = $("input[name='__RequestVerificationToken']").val();
    var c = {};
        c["Id"] = "1";
        c["CityId"] = "2";
        c["Infected"] = "3";
        c["Susceptible"] = "4";
        c["Recovered"] = "5";
        c["CityName"]=""
    $.ajax({
        url: "./DynamicEpidemic",
        type: "post",
        contentType: 'application/json; charset=utf-8',
        headers:
{
    "RequestVerificationToken": token
        },
        data: { A: JSON.stringify(c)},
        success: function () {
            alert("OK");
        }
    });
    console.log(JSON.stringify(c));

}

发送的json对象是这样的： {"Id":"1","CityId":"2","Infected":"3","Susceptible":"4","Recovered":"5","CityName":""} 但我的模型总是 null.ModelState 错误是

Unexpected character encountered while parsing value: A. Path '', line 0, position 0.

Answer 1

尝试更改为 data: JSON.stringify(c)。

Aps.net 核心 Razor 页面 [FromBody] Ajax post 模型始终为空

Aps.net core Razor page [FromBody] Ajax post Model always is null

ajax

json

asp.net-core

razor-pages