MVC Web API,错误:无法绑定多个参数

传递参数时出错,

“无法绑定多个参数”

这是我的代码

[HttpPost] public IHttpActionResult GenerateToken([FromBody]string userName, [FromBody]string password) { //... } 

阿贾克斯:

 $.ajax({ cache: false, url: 'http://localhost:14980/api/token/GenerateToken', type: 'POST', contentType: "application/json; charset=utf-8", data: { userName: "userName",password:"password" }, success: function (response) { }, error: function (jqXhr, textStatus, errorThrown) { console.log(jqXhr.responseText); alert(textStatus + ": " + errorThrown + ": " + jqXhr.responseText + " " + jqXhr.status); }, complete: function (jqXhr) { }, }) 

参考: ASP.NET Web API中的参数绑定 – 使用[FromBody]

最多允许一个参数从邮件正文中读取。 所以这不起作用

 // Caution: Will not work! public HttpResponseMessage Post([FromBody] int id, [FromBody] string name) { ... } 

此规则的原因是请求正文可能存储在只能读取一次的非缓冲流中。

强调我的

话虽如此。 您需要创建一个模型来存储预期的聚合数据。

 public class AuthModel { public string userName { get; set; } public string password { get; set; } } 

然后更新操作以期望该模型在正文中

 [HttpPost] public IHttpActionResult GenerateToken([FromBody] AuthModel model) { string userName = model.userName; string password = model.password; //... } 

确保正确发送有效负载

 var model = { userName: "userName", password: "password" }; $.ajax({ cache: false, url: 'http://localhost:14980/api/token/GenerateToken', type: 'POST', contentType: "application/json; charset=utf-8", data: JSON.stringify(model), success: function (response) { }, error: function (jqXhr, textStatus, errorThrown) { console.log(jqXhr.responseText); alert(textStatus + ": " + errorThrown + ": " + jqXhr.responseText + " " + jqXhr.status); }, complete: function (jqXhr) { }, })