反序列化HTTP POST内的对象 [英] Deserializing the object inside an http post

问题描述

您好我想从attribute.I正在使用的ASP.NET Web API框架的授权内的HttpPost方法调用反序列化对象。

下面是我的code：

 公共覆盖无效OnAuthorization（HttpActionContext ActionContext中）
    {      VAR rezult = DeserializeStream<EvaluationFormDataContract>(actionContext.Request.Content.ReadAsStreamAsync().Result);    }    私人ŧDeserializeStream＆LT; T＆GT;（流流）
    {
        VAR的BinaryFormatter =新的BinaryFormatter（）;        VAR苏亚雷斯= binaryFormatter.Deserialize（流）;        VAR T =（T）binaryFormatter.Deserialize（流）;
        返回吨;
    }
 

在此code被执行我得到这个异​​常时的BinaryFormatter tryes反序列化的：

  

输入流不是有效的二进制格式。起始内容（以字节为单位）有：73-74-75-64-65-6E-74-41-73-73-69-67-6E-6D-65-6E-74 ...

我在做什么错了？

解决方案

您尝试使用的BinaryFormatter 来这是不是二进制序列化的二进制数据的反序列化。从数据你送我看到十六进制code再presents的字符串。

73-74-75-64-65-6E-74-41-73-73-69-67-6E-6D-65-6E-74 德$ C $光盘 studentAssignment

这使我相信你在做一个简单的AJAX调用和发送JSON数据的WebAPI服务。

您需要使用JSON反序列化流。

1. 读取请求内容字符串


2. 如果内容为J​​SON，使用JSON.NET反序列化

---

  VAR JSON = actionContext.Request.Content.ReadAsStringAsync（）结果;
变种M = JsonConvert.DeserializeObject＆LT; EvaluationFormDataContract＆GT;（JSON）;
 

---

如果反应不JSON，但表单数据可以解析它像一个查询字符串。

  VAR StringData是= actionContext.Request.Content.ReadAsStringAsync（）结果;
NameValueCollection中的数据= HttpUtility.ParseQueryString（StringData是）;
串PERSONID =数据[PERSONID];
 

Hi I am trying to deserialize an Object from a HttpPost method call inside an authorize attribute.I am using ASP.NET Web Api Framework.

Here is my code:

public override void OnAuthorization(HttpActionContext actionContext)
    {

      var rezult = DeserializeStream<EvaluationFormDataContract>(actionContext.Request.Content.ReadAsStreamAsync().Result);

    }

    private T DeserializeStream<T>(Stream stream)
    {
        var binaryFormatter = new BinaryFormatter();

        var rez = binaryFormatter.Deserialize(stream);

        var t = (T)binaryFormatter.Deserialize(stream);
        return t;
    }

When this code gets executed I get this exception when the binaryFormatter tryes to deserialize it:

The input stream is not a valid binary format. The starting contents (in bytes) are: 73-74-75-64-65-6E-74-41-73-73-69-67-6E-6D-65-6E-74 ...

What am I doing wrong?

解决方案

You are trying to use BinaryFormatter to binary deserialize data which was not binary serialized. From data you sent I see that hex code represents a string.

73-74-75-64-65-6E-74-41-73-73-69-67-6E-6D-65-6E-74 decoded is studentAssignment

This leads me to believe you are doing a simple AJAX call and sending JSON data to WebAPI service.

You need to deserialize the stream using JSON.

1. Read request content as string
2. If content is JSON, deserialize it using JSON.NET

---

var json = actionContext.Request.Content.ReadAsStringAsync().Result;
var m = JsonConvert.DeserializeObject<EvaluationFormDataContract>(json);

---

If response is not JSON, but form data you can parse it like a query string.

var stringData = actionContext.Request.Content.ReadAsStringAsync().Result;
NameValueCollection data = HttpUtility.ParseQueryString(stringData);
string personId = data["personId"];

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