blocks|key|937918|text|This+answer提到了Json.NET，但没有告诉您如何使用Json.NET序列化字典：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|937919|return+JsonConvert.SerializeObject(+myDictionary+);|code-block|syntax|javascript|937920|与JavaScriptSerializer相反，myDictionary不必是<string,+string>类型的字典，JsonConvert就可以工作。|style|CODE|937921|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/13754871/1015595^0|0|B|0|0|0|O|C|13|G|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@$A|10|B|11|K|L]|$A|12|B|13|K|L]]|9|@]|C|$]]|$1|M|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

<a href="https://stackoverflow.com/a/13754871/1015595">This answer</a> mentions Json.NET but stops short of telling you how you can use Json.NET to serialize a dictionary:

<pre><code>return JsonConvert.SerializeObject( myDictionary );
</code></pre>

As opposed to JavaScriptSerializer, <code>myDictionary</code> does not have to be a dictionary of type <code>&lt;string, string&gt;</code> for JsonConvert to work.

blocks|key|721971|text|using+System;
using+System.Collections.Generic;
using+System.Linq;
using+System.Text;
using+System.Runtime.Serialization.Json;
using+System.IO;

namespace+ConsoleApplication1
{
++++class+Program
++++{
++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++Dictionary<int,+List<int>>+foo+=+new+Dictionary<int,+List<int>>();

++++++++++++foo.Add(1,+new+List<int>(+new+int[]+{+1,+2,+3,+4+}));
++++++++++++foo.Add(2,+new+List<int>(new+int[]+{+2,+3,+4,+1+}));
++++++++++++foo.Add(3,+new+List<int>(new+int[]+{+3,+4,+1,+2+}));
++++++++++++foo.Add(4,+new+List<int>(new+int[]+{+4,+1,+2,+3+}));

++++++++++++DataContractJsonSerializer+serializer+=+new+DataContractJsonSerializer(typeof(Dictionary<int,+List<int>>));

++++++++++++using+(MemoryStream+ms+=+new+MemoryStream())
++++++++++++{
++++++++++++++++serializer.WriteObject(ms,+foo);
++++++++++++++++Console.WriteLine(Encoding.Default.GetString(ms.ToArray()));
++++++++++++}
++++++++}
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|721972|这将写入控制台：|unstyled|721973|[{\"Key\":1,\"Value\":[1,2,3,4]},{\"Key\":2,\"Value\":[2,3,4,1]},{\"Key\":3,\"Value\":[3,4,1,2]},{\"Key\":4,\"Value\":[4,1,2,3]}]|721974|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization.Json;
using System.IO;

namespace ConsoleApplication1
{
 class Program
 {
 static void Main(string[] args)
 {
 Dictionary&lt;int, List&lt;int&gt;&gt; foo = new Dictionary&lt;int, List&lt;int&gt;&gt;();

 foo.Add(1, new List&lt;int&gt;( new int[] { 1, 2, 3, 4 }));
 foo.Add(2, new List&lt;int&gt;(new int[] { 2, 3, 4, 1 }));
 foo.Add(3, new List&lt;int&gt;(new int[] { 3, 4, 1, 2 }));
 foo.Add(4, new List&lt;int&gt;(new int[] { 4, 1, 2, 3 }));

 DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Dictionary&lt;int, List&lt;int&gt;&gt;));

 using (MemoryStream ms = new MemoryStream())
 {
 serializer.WriteObject(ms, foo);
 Console.WriteLine(Encoding.Default.GetString(ms.ToArray()));
 }
 }
 }
}
</code></pre>

This will write to the console:

<pre><code>[{\"Key\":1,\"Value\":[1,2,3,4]},{\"Key\":2,\"Value\":[2,3,4,1]},{\"Key\":3,\"Value\":[3,4,1,2]},{\"Key\":4,\"Value\":[4,1,2,3]}]
</code></pre>

blocks|key|937821|text|如果语法有点小，我很抱歉，但我从中获得的代码最初是在VB中编写的:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|937822|using+System.Web.Script.Serialization;

...

Dictionary<int,List<int>>+MyObj+=+new+Dictionary<int,List<int>>();

//Populate+it+here...

string+myJsonString+=+(new+JavaScriptSerializer()).Serialize(MyObj);|code-block|syntax|javascript|937823|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|$]]

Sorry if the syntax is the tiniest bit off, but the code I'm getting this from was originally in VB :)

<pre><code>using System.Web.Script.Serialization;

...

Dictionary&lt;int,List&lt;int&gt;&gt; MyObj = new Dictionary&lt;int,List&lt;int&gt;&gt;();

//Populate it here...

string myJsonString = (new JavaScriptSerializer()).Serialize(MyObj);
</code></pre>

blocks|key|937985|text|在Asp.net核心使用中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|937986|using+Newtonsoft.Json

var+obj+=+new+{+MyValue+=+1+};
var+json+=+JsonConvert.SerializeObject(obj);
var+obj2+=+JsonConvert.DeserializeObject(json);|code-block|syntax|javascript|937987|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|$]]

In Asp.net Core use:

<pre><code>using Newtonsoft.Json

var obj = new { MyValue = 1 };
var json = JsonConvert.SerializeObject(obj);
var obj2 = JsonConvert.DeserializeObject(json);
</code></pre>

blocks|key|722184|text|您可以使用System.Web.Script.Serialization.JavaScriptSerializer|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|722185|Dictionary<string,+object>+dictss+=+new+Dictionary<string,+object>(){
+++{"User",+"Mr.Joshua"},
+++{"Pass",+"4324"},
};

string+jsonString+=+(new+JavaScriptSerializer()).Serialize((object)dictss);|code-block|syntax|javascript|722186|entityMap^0|5|1G|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can use <code>System.Web.Script.Serialization.JavaScriptSerializer</code>:

<pre><code>Dictionary&lt;string, object&gt; dictss = new Dictionary&lt;string, object&gt;(){
 {"User", "Mr.Joshua"},
 {"Pass", "4324"},
};

string jsonString = (new JavaScriptSerializer()).Serialize((object)dictss);
</code></pre>

blocks|key|938156|text|下面是如何仅使用微软…的标准.Net库来完成此操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|938157|using+System.IO;
using+System.Runtime.Serialization.Json;

private+static+string+DataToJson<T>(T+data)
{
++++MemoryStream+stream+=+new+MemoryStream();

++++DataContractJsonSerializer+serialiser+=+new+DataContractJsonSerializer(
++++++++data.GetType(),
++++++++new+DataContractJsonSerializerSettings()
++++++++{
++++++++++++UseSimpleDictionaryFormat+=+true
++++++++});

++++serialiser.WriteObject(stream,+data);

++++return+Encoding.UTF8.GetString(stream.ToArray());
}|code-block|syntax|javascript|938158|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|$]]

Here's how to do it using only standard .Net libraries from Microsoft …

<pre><code>using System.IO;
using System.Runtime.Serialization.Json;

private static string DataToJson&lt;T&gt;(T data)
{
 MemoryStream stream = new MemoryStream();

 DataContractJsonSerializer serialiser = new DataContractJsonSerializer(
 data.GetType(),
 new DataContractJsonSerializerSettings()
 {
 UseSimpleDictionaryFormat = true
 });

 serialiser.WriteObject(stream, data);

 return Encoding.UTF8.GetString(stream.ToArray());
}
</code></pre>

blocks|key|722445|text|如果您的上下文允许(技术限制等)，使用Newtonsoft.Json中的JsonConvert.SerializeObject方法:它将使您的工作变得更容易。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|722446|Dictionary<string,+string>+localizedWelcomeLabels+=+new+Dictionary<string,+string>();
localizedWelcomeLabels.Add("en",+"Welcome");
localizedWelcomeLabels.Add("fr",+"Bienvenue");
localizedWelcomeLabels.Add("de",+"Willkommen");
Console.WriteLine(JsonConvert.SerializeObject(localizedWelcomeLabels));

//+Outputs+:+{"en":"Welcome","fr":"Bienvenue","de":"Willkommen"}|code-block|syntax|javascript|722447|entityMap|0|LINK|mutability|MUTABLE|url|https://www.nuget.org/packages/Newtonsoft.Json/^0|10|R|J|F|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

If your context allows it (technical constraints, etc.), use the <code>JsonConvert.SerializeObject</code> method from <a href="https://www.nuget.org/packages/Newtonsoft.Json/" rel="nofollow noreferrer">Newtonsoft.Json</a> : it will make your life easier.

<pre><code>Dictionary&lt;string, string&gt; localizedWelcomeLabels = new Dictionary&lt;string, string&gt;();
localizedWelcomeLabels.Add("en", "Welcome");
localizedWelcomeLabels.Add("fr", "Bienvenue");
localizedWelcomeLabels.Add("de", "Willkommen");
Console.WriteLine(JsonConvert.SerializeObject(localizedWelcomeLabels));

// Outputs : {"en":"Welcome","fr":"Bienvenue","de":"Willkommen"}
</code></pre>

blocks|key|722082|text|您可以使用JavaScriptSerializer。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|722083|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx^0|5|K|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You could use <a href="http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx" rel="nofollow">JavaScriptSerializer</a>.

blocks|key|722317|text|这与Meritt之前发布的内容类似。我只是发布了完整的代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|722318|++++string+sJSON;
++++Dictionary<string,+string>+aa1+=+new+Dictionary<string,+string>();
++++aa1.Add("one",+"1");+aa1.Add("two",+"2");+aa1.Add("three",+"3");
++++Console.Write("JSON+form+of+Person+object:+");

++++sJSON+=+WriteFromObject(aa1);
++++Console.WriteLine(sJSON);

++++Dictionary<string,+string>+aaret+=+new+Dictionary<string,+string>();
++++aaret+=+ReadToObject<Dictionary<string,+string>>(sJSON);

++++public+static+string+WriteFromObject(object+obj)
++++{++++++++++++
++++++++byte[]+json;
++++++++++++//Create+a+stream+to+serialize+the+object+to.++
++++++++using+(MemoryStream+ms+=+new+MemoryStream())
++++++++{++++++++++++++++
++++++++++++//+Serializer+the+object+to+the+stream.++
++++++++++++DataContractJsonSerializer+ser+=+new+DataContractJsonSerializer(obj.GetType());
++++++++++++ser.WriteObject(ms,+obj);
++++++++++++json+=+ms.ToArray();
++++++++++++ms.Close();
++++++++}
++++++++return+Encoding.UTF8.GetString(json,+0,+json.Length);

++++}

++++//+Deserialize+a+JSON+stream+to+object.++
++++public+static+T+ReadToObject<T>(string+json)+where+T+:+class,+new()
++++{
++++++++T+deserializedObject+=+new+T();
++++++++using+(MemoryStream+ms+=+new+MemoryStream(Encoding.UTF8.GetBytes(json)))
++++++++{

++++++++++++DataContractJsonSerializer+ser+=+new+DataContractJsonSerializer(deserializedObject.GetType());
++++++++++++deserializedObject+=+ser.ReadObject(ms)+as+T;
++++++++++++ms.Close();
++++++++}
++++++++return+deserializedObject;
++++}|code-block|syntax|javascript|722319|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|$]]

This is Similar to what Meritt has posted earlier. just posting the complete code

<pre><code> string sJSON;
 Dictionary&lt;string, string&gt; aa1 = new Dictionary&lt;string, string&gt;();
 aa1.Add("one", "1"); aa1.Add("two", "2"); aa1.Add("three", "3");
 Console.Write("JSON form of Person object: ");

 sJSON = WriteFromObject(aa1);
 Console.WriteLine(sJSON);

 Dictionary&lt;string, string&gt; aaret = new Dictionary&lt;string, string&gt;();
 aaret = ReadToObject&lt;Dictionary&lt;string, string&gt;&gt;(sJSON);

 public static string WriteFromObject(object obj)
 { 
 byte[] json;
 //Create a stream to serialize the object to. 
 using (MemoryStream ms = new MemoryStream())
 { 
 // Serializer the object to the stream. 
 DataContractJsonSerializer ser = new DataContractJsonSerializer(obj.GetType());
 ser.WriteObject(ms, obj);
 json = ms.ToArray();
 ms.Close();
 }
 return Encoding.UTF8.GetString(json, 0, json.Length);

 }

 // Deserialize a JSON stream to object. 
 public static T ReadToObject&lt;T&gt;(string json) where T : class, new()
 {
 T deserializedObject = new T();
 using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))
 {

 DataContractJsonSerializer ser = new DataContractJsonSerializer(deserializedObject.GetType());
 deserializedObject = ser.ReadObject(ms) as T;
 ms.Close();
 }
 return deserializedObject;
 }
</code></pre>

blocks|key|722509|text|仅供参考，在所有较旧的解决方案中:+UWP有自己的内置JSON库Windows.Data.Json。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|722510|JsonObject是一个地图，您可以直接使用它来存储数据：|722511|var+options+=+new+JsonObject();
options["foo"]+=+JsonValue.CreateStringValue("bar");
string+json+=+options.ToString();|code-block|syntax|javascript|722512|entityMap^0|W|H|0|0|A|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

Just for reference, among all the older solutions: UWP has its own built-in JSON library, <code>Windows.Data.Json</code>.
<code>JsonObject</code> is a map that you can use directly to store your data:
<pre><code>var options = new JsonObject();
options[&quot;foo&quot;] = JsonValue.CreateStringValue(&quot;bar&quot;);
string json = options.ToString();
</code></pre>

blocks|key|722540|text|改进了mwjohnson的版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|722541|string+WriteDictionaryAsJson_v2(Dictionary<string,+List<string>>+myDict)
{
++++string+str_json+=+"";
++++DataContractJsonSerializerSettings+setting+=+
++++++++new+DataContractJsonSerializerSettings()
++++++++{
++++++++++++UseSimpleDictionaryFormat+=+true
++++++++};

++++DataContractJsonSerializer+js+=+
++++++++new+DataContractJsonSerializer(typeof(Dictionary<string,+List<string>>),+setting);

++++using+(MemoryStream+ms+=+new+MemoryStream())
++++{++++++++++++++++
++++++++//+Serializer+the+object+to+the+stream.++
++++++++js.WriteObject(ms,+myDict);
++++++++str_json+=+Encoding.Default.GetString(ms.ToArray());

++++}
++++return+str_json;
}|code-block|syntax|javascript|722542|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|$]]

improved mwjohnson's version:
<pre><code>string WriteDictionaryAsJson_v2(Dictionary&lt;string, List&lt;string&gt;&gt; myDict)
{
 string str_json = &quot;&quot;;
 DataContractJsonSerializerSettings setting = 
 new DataContractJsonSerializerSettings()
 {
 UseSimpleDictionaryFormat = true
 };

 DataContractJsonSerializer js = 
 new DataContractJsonSerializer(typeof(Dictionary&lt;string, List&lt;string&gt;&gt;), setting);

 using (MemoryStream ms = new MemoryStream())
 { 
 // Serializer the object to the stream. 
 js.WriteObject(ms, myDict);
 str_json = Encoding.Default.GetString(ms.ToArray());

 }
 return str_json;
}
</code></pre>

I want to convert my <code>Dictionary&lt;int,List&lt;int&gt;&gt;</code> to JSON string. Does anyone know how to achieve this in C#?

How do I convert a dictionary to a JSON String in C#?

Windows

JSON

我想把我的Dictionary<int,List<int>>转换成JSON字符串。有人知道如何在C#中实现这一点吗？

问如何在C#中将字典转换为JSON字符串？
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回答 11

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问如何在C#中将字典转换为JSON字符串？EN

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