asp.net - Asp.net POST参数始终为null

为了传递电子邮件地址，我使用的是带有POST类型的Ajax。

$.ajax({
    url: "api/Search/UserByEmail",
    type: "POST",
    data: JSON.stringify({ emailAddress: userEmail }),
    contentType: "application/json;charset=utf-8",
    dataType: "json",
    success: function (data) { ... }
});

控制器：

[HttpPost]
public IEnumerable<Object> UserByEmail([FromBody] string emailAddress) { ... }

提琴手就是这样说的：

POST http://localhost:52498/api/Search/UserByEmail HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/json;charset=utf-8
X-Requested-With: XMLHttpRequest
Referer: http://localhost:52498/#
Accept-Language: de-DE
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)
Host: localhost:52498
Content-Length: 35
DNT: 1
Connection: Keep-Alive
Pragma: no-cache

{"emailAddress":"[email protected]"}

为什么emailAddress参数始终为null？

最佳答案

 // JS - jQuery
 $.ajax({
        url: "/Home/UserByEmail",
        type: "POST",
        data: { emailAddress: "[email protected]" },
        dataType: "json",
        success: function (data) { if(data != null) { alert(data.toString()); } }
    });



  [Serializable]
  public class EmailFormModel {
     public string emailAddress { get; set; }
  }

    [HttpPost]
    public JsonResult UserByEmail(EmailFormModel emailFormModel)
    {
        bool ok = emailFormModel.emailAddress != null;
        return Json(new { ok });
    }

使用formModel并将可序列化的属性放在类上，它将进行序列化
您的javascript自动转换为C＃等效语言。而且您不需要使用Json-stringify。

请注意，删除了// contentType：“ application / json; charset = utf-8”，
ajax方法的声明。我实际上从未使用过它。

关于asp.net - Asp.net POST参数始终为null，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19132385/