c# - 内容 '\/Date(' ')\/' does not start with '\/Date (' and end with ' )\/' 根据 JSON 要求

Question

如您所见，我想向 WCF 休息服务发送 post 请求:

Guid id;
id = Guid.NewGuid();

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:47026/NewsRepository.svc/AddNews");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
    string json = new JavaScriptSerializer().Serialize(new
    {       
        id = id,
        Subject="wfwf",
        ViewerCounter="1",
        Content="fsdsd",
        SubmitDatatime="2012/12/12",
        ModifiedDateTime="2012/12/12",
        PublisherName="sdaadasd",
        PictureAddress="adfafsd",
        TypeOfNews="adsadaad"                       
    });

    streamWriter.Write(json);
}
try 
{ 
    var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
    using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
    {
        var result = streamReader.ReadToEnd();
    }
}
catch(Exception er)
{
    MessageBox.Show(er.ToString());
}

但我收到一个错误 - 400 错误请求。所以我跟踪了我的 WCF 日志文件并发现了这个错误:

There was an error deserializing the object of type CMSManagement.Domain.Entity.News. DateTime content '2012/12/12' does not start with '/Date(' and end with ')/' as required for JSON.

在我亲爱的 friend @svek 代码之后。结果是这样的:

Guid id;
id = Guid.NewGuid();

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:47026/NewsRepository.svc/AddNews");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "PUT";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
    JsonSerializerSettings microsoftDateFormatSettings = new JsonSerializerSettings
    {
        DateFormatHandling = DateFormatHandling.MicrosoftDateFormat
    };

    string json = JsonConvert.SerializeObject(new
    {
        id = id,
        Subject = "wfwf",
        ViewerCounter = "1",
        Content = "fsdsd",
        SubmitDatatime = "2012/12/12",
        ModifiedDateTime = "2012/12/12",
        PublisherName = "sdaadasd",
        PictureAddress = "adfafsd",
        TypeOfNews = "adsadaad"
    }, microsoftDateFormatSettings);
    streamWriter.Write(json);
}
try 
{ 
    var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
    using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
    {
        var result = streamReader.ReadToEnd();
    }
}
catch(Exception er)
{
    MessageBox.Show(er.ToString());
}

但是我得到了同样的错误。为什么？

Answer 1

使用 JsonConvert

而不是使用

string json = new JavaScriptSerializer().Serialize( new {...} );

使用

//using Newtonsoft.Json;
string json = JsonConvert.SerializeObject(new {...} );

---

设置日期时间格式

Prior to Json.NET 4.5 dates were written using the Microsoft format: "/Date(1198908717056)/". If you want to use this format, or you want to maintain compatibility with Microsoft JSON serializers or older versions of Json.NET, then change the DateFormatHandling setting to MicrosoftDateFormat.

来源:http://www.newtonsoft.com/json/help/html/DatesInJSON.htm

默认 Json.NET 4.5 格式

// default as of Json.NET 4.5
string isoJson = JsonConvert.SerializeObject(data);
// { "MyDateProperty":"2009-02-15T00:00:00Z" }

Microsoft Date Format

JsonSerializerSettings microsoftDateFormatSettings = new JsonSerializerSettings
{
    DateFormatHandling = DateFormatHandling.MicrosoftDateFormat
};

string microsoftJson = JsonConvert.SerializeObject(data, microsoftDateFormatSettings);
// { "MyDateProperty":"\/Date(1234656000000)\/" }

JavaScript JSON 格式

string javascriptJson = JsonConvert.SerializeObject(data, 
    new JavaScriptDateTimeConverter());
// { "MyDateProperty":new Date(1234656000000)}

---

解决方案代码

这是针对您的问题的完整解决方案:

JsonSerializerSettings microsoftDateFormatSettings = new JsonSerializerSettings
{
    DateFormatHandling = DateFormatHandling.MicrosoftDateFormat
};

string json = JsonConvert.SerializeObject(new
{
    id = id,
    Subject = "wfwf",
    ViewerCounter = "1",
    Content = "fsdsd",
    SubmitDatatime = "2012/12/12",
    ModifiedDateTime = "2012/12/12",
    PublisherName = "sdaadasd",
    PictureAddress = "adfafsd",
    TypeOfNews = "adsadaad"

}, microsoftDateFormatSettings); // ⇦ Added the format argument here

using (StreamWriter streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
    JsonSerializer serializer = new JsonSerializer();
    serializer.Serialize(streamWriter, json);
}