blocks|key|3353445|text|尝试使用JavaScriptSerializer而不是DataContractJsonSerializer|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353446|JavaScriptSerializer+serializer+=+new+JavaScriptSerializer();
var+output+=+serializer.Serialize(your_anon_object);|code-block|syntax|javascript|3353447|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try the JavaScriptSerializer instead of the DataContractJsonSerializer

<pre><code>JavaScriptSerializer serializer = new JavaScriptSerializer();
var output = serializer.Serialize(your_anon_object);
</code></pre>

blocks|key|3353459|text|请注意，这是2008年的数据。今天，我认为序列化程序应该是内置的，你可以使用swagger+%2B属性来通知消费者你的端点和返回数据。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353460|3353461|我认为不应该序列化匿名类型。我知道这里的诱惑；您希望快速生成一些一次性类型，这些类型将在松散类型环境中使用，也就是浏览器中的Javascript。尽管如此，我还是会创建一个实际的类型，并将其装饰为Serializable。然后你就可以强类型你的web方法了。虽然这对Javascript来说无关紧要，但它确实为方法增加了一些自我文档化。任何有一定经验的程序员都可以看到函数签名并说，“哦，这是Foo类型！我知道它在JSON中应该是什么样子。”|offset|length|style|BOLD|3353462|话虽如此，您可以尝试使用进行序列化。我不知道它会不会起作用|3353463|entityMap^0|0|0|3|A|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|N|8|@]|9|@]|A|$]]|$1|C|3|D|5|6|7|O|8|@$E|P|F|Q|G|H]]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|L|$]]

Please note this is from 2008. Today I would argue that the serializer should be built in and that you can probably use swagger + attributes to inform consumers about your endpoint and return data.

<hr>

Iwould argue that you shouldn't be serializing an anonymous type. I know the temptation here; you want to quickly generate some throw-away types that are just going to be used in a loosely type environment aka Javascript in the browser. Still, I would create an actual type and decorate it as Serializable. Then you can strongly type your web methods. While this doesn't matter one iota for Javascript, it does add some self-documentation to the method. Any reasonably experienced programmer will be able to look at the function signature and say, "Oh, this is type Foo! I know how that should look in JSON."

Having said that, you might try <a href="http://james.newtonking.com/pages/json-net.aspx" rel="nofollow noreferrer">JSON.Net</a> to do the serialization. I have no idea if it will work

blocks|key|3353477|text|假设您正在将其用于web服务，则只需将以下属性应用于该类：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353478|[System.Web.Script.Services.ScriptService]|code-block|syntax|javascript|3353479|然后将以下属性添加到应返回Json的每个方法：|3353480|[ScriptMethod(ResponseFormat+=+ResponseFormat.Json)]|3353481|并将这些方法的返回类型设置为"object“|3353482|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Assuming you are using this for a web service, you can just apply the following attribute to the class:

<pre><code>[System.Web.Script.Services.ScriptService]
</code></pre>

Then the following attribute to each method that should return Json:

<pre><code>[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
</code></pre>

And set the return type for the methods to be "object"

blocks|key|358973|text|你可以试试我的ServiceStack+JsonSerializer，现在是fastest+.NET+JSON+serializer。它支持序列化DataContract、任何POCO类型、接口、后期绑定对象(包括匿名类型)等。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|358974|基本示例|358975|var+customer+=+new+Customer+{+Name="Joe+Bloggs",+Age=31+};
var+json+=+customer.ToJson();
var+fromJson+=+json.FromJson<Customer>();+|code-block|syntax|javascript|358976|注意:只有在性能对你不重要的情况下才使用微软的JavaScriptSerializer，因为我不得不把它从我的基准测试中去掉，因为它比其他序列化程序慢40x-100x。|style|BOLD|358977|entityMap|0|LINK|mutability|MUTABLE|url|http://www.servicestack.net/mythz_blog/?p=344|1|http://www.servicestack.net/benchmarks/NorthwindDatabaseRowsSerialization.100000-times.2010-08-17.html^0|K|E|0|12|S|1|0|0|0|1X|E|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]|$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|16|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|17|8|@$A|18|B|19|M|N]]|9|@]|C|$]]|$1|O|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]]]

You can try my ServiceStack <a href="http://www.servicestack.net/mythz_blog/?p=344" rel="noreferrer">JsonSerializer</a> it's the <a href="http://www.servicestack.net/benchmarks/NorthwindDatabaseRowsSerialization.100000-times.2010-08-17.html" rel="noreferrer">fastest .NET JSON serializer</a> at the moment. It supports serializing DataContract's, Any POCO Type, Interfaces, Late-bound objects including anonymous types, etc.

Basic Example

<pre><code>var customer = new Customer { Name="Joe Bloggs", Age=31 };
var json = customer.ToJson();
var fromJson = json.FromJson&lt;Customer&gt;(); 
</code></pre>

Note: Only use Microsofts JavaScriptSerializer if performance is not important to you as I've had to leave it out of my benchmarks since its up to 40x-100x slower than the other JSON serializers.

blocks|key|354346|text|public+static+class+JsonSerializer
{
++++public+static+string+Serialize<T>(this+T+data)
++++{
++++++++try
++++++++{
++++++++++++DataContractJsonSerializer+serializer+=+new+DataContractJsonSerializer(typeof(T));
++++++++++++var+stream+=+new+MemoryStream();
++++++++++++serializer.WriteObject(stream,+data);
++++++++++++string+jsonData+=+Encoding.UTF8.GetString(stream.ToArray(),+0,+(int)stream.Length);
++++++++++++stream.Close();
++++++++++++return+jsonData;
++++++++}
++++++++catch
++++++++{
++++++++++++return+"";
++++++++}
++++}
++++public+static+T+Deserialize<T>(this+string+jsonData)
++++{
++++++++try
++++++++{
++++++++++++DataContractJsonSerializer+slzr+=+new+DataContractJsonSerializer(typeof(T));
++++++++++++var+stream+=+new+MemoryStream(Encoding.UTF8.GetBytes(jsonData));
++++++++++++T+data+=+(T)slzr.ReadObject(stream);
++++++++++++stream.Close();
++++++++++++return+data;
++++++++}
++++++++catch
++++++++{
++++++++++++return+default(T);
++++++++}
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|354347|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public static class JsonSerializer
{
 public static string Serialize&lt;T&gt;(this T data)
 {
 try
 {
 DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
 var stream = new MemoryStream();
 serializer.WriteObject(stream, data);
 string jsonData = Encoding.UTF8.GetString(stream.ToArray(), 0, (int)stream.Length);
 stream.Close();
 return jsonData;
 }
 catch
 {
 return "";
 }
 }
 public static T Deserialize&lt;T&gt;(this string jsonData)
 {
 try
 {
 DataContractJsonSerializer slzr = new DataContractJsonSerializer(typeof(T));
 var stream = new MemoryStream(Encoding.UTF8.GetBytes(jsonData));
 T data = (T)slzr.ReadObject(stream);
 stream.Close();
 return data;
 }
 catch
 {
 return default(T);
 }
 }
}
</code></pre>

blocks|key|354349|text|正如其他人所提到的，Newtonsoft+JSON.NET是一个很好的选择。下面是一个简单JSON序列化的具体示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|354350|return+JsonConvert.SerializeObject(
++++new
++++{
+++++++DataElement1,
+++++++SomethingElse
++++});|code-block|syntax|javascript|354351|我发现它是一个非常灵活、通用的库。|354352|entityMap|0|LINK|mutability|MUTABLE|url|http://james.newtonking.com/projects/json-net.aspx^0|A|J|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

As others have mentioned, <a href="http://james.newtonking.com/projects/json-net.aspx">Newtonsoft JSON.NET</a> is a good option. Here is a specific example for simple JSON serialization:

<pre><code>return JsonConvert.SerializeObject(
 new
 {
 DataElement1,
 SomethingElse
 });
</code></pre>

I have found it to be a very flexible, versatile library.

blocks|key|3353527|text|我发现的最快的方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353528|var+obj+=+new+{Id+=+thing.Id,+Name+=+thing.Name,+Age+=+30};
JavaScriptSerializer+serializer+=+new+JavaScriptSerializer();
string+json+=+serializer.Serialize(obj);|code-block|syntax|javascript|3353529|命名空间:+System.Web.Script.Serialization.JavaScriptSerializer|3353530|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The fastest way I found was this:

<pre><code>var obj = new {Id = thing.Id, Name = thing.Name, Age = 30};
JavaScriptSerializer serializer = new JavaScriptSerializer();
string json = serializer.Serialize(obj);
</code></pre>

Namespace: System.Web.Script.Serialization.JavaScriptSerializer

blocks|key|3353538|text|您可以使用Newtonsoft.Json。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353539|var+warningJSON+=+JsonConvert.SerializeObject(new+{
++++++++++++++++warningMessage+=+"You+have+been+warned..."
++++++++++++});|code-block|syntax|javascript|3353540|微软在System.Text.Json上的新库的一个更快的替代方案|3353541|var+warningJSON+=+JsonSerializer.Serialize(new
++++++++{
++++++++++++warningMessage+=+"You+have+been+warned..."
++++++++});|3353542|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You could use Newtonsoft.Json.
<pre><code>var warningJSON = JsonConvert.SerializeObject(new {
 warningMessage = &quot;You have been warned...&quot;
 });
</code></pre>
A faster alternative with Microsofts' new library on System.Text.Json
<pre><code>var warningJSON = JsonSerializer.Serialize(new
 {
 warningMessage = &quot;You have been warned...&quot;
 });
</code></pre>

blocks|key|3353558|text|对于那些在2020年左右检查这一点的人：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3353559|微软的System.Text.Json命名空间是新的王者。就性能而言，据我所知，它是最好的：|3353560|var+model+=+new+Model
{
++++Name+=+"Test+Name",
++++Age+=+5
};

string+json+=+JsonSerializer.Serialize(model);|code-block|syntax|javascript|3353561|正如其他一些人所提到的，NewtonSoft.Json也是一个非常好的库。|3353562|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For those checking this around the year 2020:
Microsoft's System.Text.Json namespace is the new king in town. In terms of performance, it is the best as far as I can tell:
<pre><code>var model = new Model
{
 Name = &quot;Test Name&quot;,
 Age = 5
};

string json = JsonSerializer.Serialize(model);
</code></pre>
As some others have mentioned, NewtonSoft.Json is a very nice library as well.

I'm attempting to use the following code to serialize an anonymous type to JSON:

<pre><code>var serializer = new DataContractJsonSerializer(thing.GetType());
var ms = new MemoryStream();
serializer.WriteObject(ms, thing);
var json = Encoding.Default.GetString(ms.ToArray()); 
</code></pre>

However, I get the following exception when this is executed:

<blockquote>
 Type
 '&lt;>f__AnonymousType1`3[System.Int32,System.Int32,System.Object[]]'
 cannot be serialized. Consider marking
 it with the DataContractAttribute
 attribute, and marking all of its
 members you want serialized with the
 DataMemberAttribute attribute. See
 the Microsoft .NET Framework
 documentation for other supported
 types.
</blockquote>

I can't apply attributes to an anonymous type (as far as I know). Is there another way to do this serialization or am I missing something?

How do I serialize a C# anonymous type to a JSON string?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我尝试使用以下代码将匿名类型序列化为JSON：var serializer = new DataContractJsonSerializer(thing.GetType());var ms = new MemoryStream();serializer.WriteObject(ms, thing);var json =...

问如何将C#匿名类型序列化为JSON字符串？
EN

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问如何将C#匿名类型序列化为JSON字符串？EN