Question

我在使用带有MVC的Web API时遇到一些问题，不确定是什么导致了它，但它没有在调试模式下抛出任何异常或错误，请有人帮忙解决这个问题。

代码如下：

MVC控制器调用：

PortalLogonCheckParams credParams = new PortalLogonCheckParams() {SecurityLogonLogonId = model.UserName, SecurityLogonPassword = model.Password};

SecurityLogon secureLogon = new SecurityLogon();

var result = secureLogon.checkCredentials(credParams);

数据访问对象方法：

public async Task <IEnumerable<PortalLogon>> checkCredentials(PortalLogonCheckParams credParams)
{
    using (var client = new HttpClient())
    {
        client.BaseAddress = new Uri("http://localhost:50793/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        // Check Credentials

        //Following call fails

        HttpResponseMessage response = await client.PostAsJsonAsync("api/chkPortalLogin", credParams);  


        if (response.IsSuccessStatusCode)
        {
            IEnumerable<PortalLogon> logonList = await response.Content.ReadAsAsync<IEnumerable<PortalLogon>>();
            return logonList;
        }
        else return null;
    }

}

Web API：

[HttpPost]
public IHttpActionResult chkPortalLogin([FromBody] PortalLogonCheckParams LogonParams)
{

    List<Mod_chkPortalSecurityLogon> securityLogon = null;

    String strDBName = "";

    //Set the database identifier        
    strDBName = "Mod";

    //Retrieve the Logon object
    using (DataConnection connection = new DataConnection(strDBName))
    {
        //Retrieve the list object
        securityLogon = new Persistant_Mod_chkPortalSecurityLogon().findBy_Search(connection.Connection, LogonParams.SecurityLogonLogonId, LogonParams.SecurityLogonPassword);
    }

    AutoMapper.Mapper.CreateMap<Mod_chkPortalSecurityLogon, PortalLogon>();

    IEnumerable<PortalLogon> securityLogonNew = AutoMapper.Mapper.Map<IEnumerable<Mod_chkPortalSecurityLogon>, IEnumerable<PortalLogon>>(securityLogon);


    return Ok(securityLogonNew);

}

Answer 1

您需要从参数

中删除[FromBody]属性

Using [FromBody]

要强制Web API从请求正文中读取简单类型，请添加   [FromBody]属性为参数：
public HttpResponseMessage Post([FromBody] string name) { ... }
在此示例中，Web API将使用媒体类型格式化程序来读取请求正文中的name值。这是一个示例客户端请求。
POST http://localhost:5076/api/values HTTP/1.1
User-Agent: Fiddler
Host: localhost:5076
Content-Type: application/json
Content-Length: 7

"Alice"
当参数具有[FromBody]时，Web API使用Content-Type标头   选择格式化程序。在此示例中，内容类型为   “application / json”和请求体是一个原始的JSON字符串（不是   JSON对象）。

最多允许一个参数从邮件正文中读取。

HttpClient.PostAsJsonAsync无法正常工作或在调试模式下出现任何错误

1 个答案: