我如何得到格式化的JSON在.NET使用c# ?

我正在使用. net JSON解析器，并想序列化我的配置文件，使其可读。所以不要:

{"blah":"v", "blah2":"v2"}

我想要更好的东西，比如:

{
"blah":"v",
"blah2":"v2"
}

我的代码是这样的:

using System.Web.Script.Serialization;


var ser = new JavaScriptSerializer();
configSz = ser.Serialize(config);
using (var f = (TextWriter)File.CreateText(configFn))
{
f.WriteLine(configSz);
f.Close();
}
342686 次浏览
小开

用JavaScriptSerializer来完成这个任务会很困难。

JSON。网试试。

对JSON进行了少量修改。净的例子

using System;
using Newtonsoft.Json;


namespace JsonPrettyPrint
{
internal class Program
{
private static void Main(string[] args)
{
Product product = new Product
{
Name = "Apple",
Expiry = new DateTime(2008, 12, 28),
Price = 3.99M,
Sizes = new[] { "Small", "Medium", "Large" }
};


string json = JsonConvert.SerializeObject(product, Formatting.Indented);
Console.WriteLine(json);


Product deserializedProduct = JsonConvert.DeserializeObject<Product>(json);
}
}


internal class Product
{
public String[] Sizes { get; set; }
public decimal Price { get; set; }
public DateTime Expiry { get; set; }
public string Name { get; set; }
}
}

结果

{
"Sizes": [
"Small",
"Medium",
"Large"
],
"Price": 3.99,
"Expiry": "\/Date(1230447600000-0700)\/",
"Name": "Apple"
}

文档:序列化一个对象 .

小开

Json的简短示例代码。网络图书馆

private static string FormatJson(string json)
{
dynamic parsedJson = JsonConvert.DeserializeObject(json);
return JsonConvert.SerializeObject(parsedJson, Formatting.Indented);
}
小开

如果你有一个JSON字符串，想要“美化”它，但不想将它序列化到一个已知的c#类型，那么下面的方法就可以了(使用JSON.NET):

using System;
using System.IO;
using Newtonsoft.Json;


class JsonUtil
{
public static string JsonPrettify(string json)
{
using (var stringReader = new StringReader(json))
using (var stringWriter = new StringWriter())
{
var jsonReader = new JsonTextReader(stringReader);
var jsonWriter = new JsonTextWriter(stringWriter) { Formatting = Formatting.Indented };
jsonWriter.WriteToken(jsonReader);
return stringWriter.ToString();
}
}
}
小开

你可以使用以下标准方法来获取格式化的Json

JsonReaderWriterFactory。CreateJsonWriter(流流，编码编码，bool ownsStream, bool缩进，字符串indentChars)

只设置“缩进= = true”

试试这样的方法

    public readonly DataContractJsonSerializerSettings Settings =
new DataContractJsonSerializerSettings
{ UseSimpleDictionaryFormat = true };


public void Keep<TValue>(TValue item, string path)
{
try
{
using (var stream = File.Open(path, FileMode.Create))
{
//var currentCulture = Thread.CurrentThread.CurrentCulture;
//Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;


try
{
using (var writer = JsonReaderWriterFactory.CreateJsonWriter(
stream, Encoding.UTF8, true, true, "  "))
{
var serializer = new DataContractJsonSerializer(type, Settings);
serializer.WriteObject(writer, item);
writer.Flush();
}
}
catch (Exception exception)
{
Debug.WriteLine(exception.ToString());
}
finally
{
//Thread.CurrentThread.CurrentCulture = currentCulture;
}
}
}
catch (Exception exception)
{
Debug.WriteLine(exception.ToString());
}
}

注意线条

    var currentCulture = Thread.CurrentThread.CurrentCulture;
Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
....
Thread.CurrentThread.CurrentCulture = currentCulture;

对于某些类型的xml序列化器，您应该使用InvariantCulture来避免在具有不同区域设置的计算机上反序列化时出现异常。例如，无效的双或DateTime格式有时会导致错误。

在反序列化

    public TValue Revive<TValue>(string path, params object[] constructorArgs)
{
try
{
using (var stream = File.OpenRead(path))
{
//var currentCulture = Thread.CurrentThread.CurrentCulture;
//Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;


try
{
var serializer = new DataContractJsonSerializer(type, Settings);
var item = (TValue) serializer.ReadObject(stream);
if (Equals(item, null)) throw new Exception();
return item;
}
catch (Exception exception)
{
Debug.WriteLine(exception.ToString());
return (TValue) Activator.CreateInstance(type, constructorArgs);
}
finally
{
//Thread.CurrentThread.CurrentCulture = currentCulture;
}
}
}
catch
{
return (TValue) Activator.CreateInstance(typeof (TValue), constructorArgs);
}
}

谢谢!

小开

美化现有JSON:的最短版本(使用JSON.net编辑)

JToken.Parse("mystring").ToString()

输入:

{"menu": { "id": "file", "value": "File", "popup": { "menuitem": [ {"value": "New", "onclick": "CreateNewDoc()"}, {"value": "Open", "onclick": "OpenDoc()"}, {"value": "Close", "onclick": "CloseDoc()"} ] } }}

输出:

{
"menu": {
"id": "file",
"value": "File",
"popup": {
"menuitem": [
{
"value": "New",
"onclick": "CreateNewDoc()"
},
{
"value": "Open",
"onclick": "OpenDoc()"
},
{
"value": "Close",
"onclick": "CloseDoc()"
}
]
}
}
}

对漂亮地打印一个对象:

JToken.FromObject(myObject).ToString()
小开

首先我想在Duncan Smart的帖子下添加评论，但不幸的是，我还没有足够的声誉来留下评论。我在这里试试。

我只是想警告一下副作用。

JsonTextReader在内部将json解析为类型化的jtoken，然后将它们序列化回来。

例如，如果您的原始JSON是

{ "double":0.00002, "date":"\/Date(1198908717056)\/"}

美化之后你得到

{
"double":2E-05,
"date": "2007-12-29T06:11:57.056Z"
}

当然，这两个json字符串是等价的，并且将反序列化为结构上相等的对象，但如果您需要保留原始字符串值，则需要考虑这一点

小开

使用Newtonsoft.Json.Linq的onlineer:

string prettyJson = JToken.Parse(uglyJsonString).ToString(Formatting.Indented);
小开

下面是一个使用微软System.Text.Json库的解决方案:

static string FormatJsonText(string jsonString)
{
using var doc = JsonDocument.Parse(
jsonString,
new JsonDocumentOptions
{
AllowTrailingCommas = true
}
);
MemoryStream memoryStream = new MemoryStream();
using (
var utf8JsonWriter = new Utf8JsonWriter(
memoryStream,
new JsonWriterOptions
{
Indented = true
}
)
)
{
doc.WriteTo(utf8JsonWriter);
}
return new System.Text.UTF8Encoding()
.GetString(memoryStream.ToArray());
}
小开

这对我很管用。以防有人在找VB。净版。

@imports System
@imports System.IO
@imports Newtonsoft.Json
    

Public Shared Function JsonPrettify(ByVal json As String) As String
Using stringReader = New StringReader(json)


Using stringWriter = New StringWriter()
Dim jsonReader = New JsonTextReader(stringReader)
Dim jsonWriter = New JsonTextWriter(stringWriter) With {
.Formatting = Formatting.Indented
}
jsonWriter.WriteToken(jsonReader)
Return stringWriter.ToString()
End Using
End Using
End Function
小开

使用System.Text.Json设置JsonSerializerOptions.WriteIndented = true:

JsonSerializerOptions options = new JsonSerializerOptions { WriteIndented = true };
string json = JsonSerializer.Serialize<Type>(object, options);
小开

所有这些都可以在一行中完成:

string jsonString = JsonConvert.SerializeObject(yourObject, Formatting.Indented);
小开

Net Core App

var js = JsonSerializer.Serialize(obj, new JsonSerializerOptions {
WriteIndented = true
});
小开

下面的代码为我工作:

JsonConvert.SerializeObject(JToken.Parse(yourobj.ToString()))
小开

对于使用。net Core 3.1的UTF8编码的JSON文件，我最终能够使用基于微软:https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-how-to#utf8jsonreader-utf8jsonwriter-and-jsondocument的信息的JsonDocument

string allLinesAsOneString = string.Empty;
string [] lines = File.ReadAllLines(filename, Encoding.UTF8);
foreach(var line in lines)
allLinesAsOneString += line;


JsonDocument jd = JsonDocument.Parse(Encoding.UTF8.GetBytes(allLinesAsOneString));
var writer = new Utf8JsonWriter(Console.OpenStandardOutput(), new JsonWriterOptions
{
Indented = true
});
JsonElement root = jd.RootElement;
if( root.ValueKind == JsonValueKind.Object )
{
writer.WriteStartObject();
}
foreach (var jp in root.EnumerateObject())
jp.WriteTo(writer);
writer.WriteEndObject();


writer.Flush();
小开

我有一些非常简单的方法。你可以输入任何需要转换成json格式的对象:

private static string GetJson<T> (T json)
{
return JsonConvert.SerializeObject(json, Formatting.Indented);
}
小开

. net 5内置了在System.Text.Json命名空间下处理JSON解析、序列化、反序列化的类。下面是一个序列化器的例子，它将。net对象转换为JSON字符串，

using System.Text.Json;
using System.Text.Json.Serialization;


private string ConvertJsonString(object obj)
{
JsonSerializerOptions options = new JsonSerializerOptions();
options.WriteIndented = true; //Pretty print using indent, white space, new line, etc.
options.NumberHandling = JsonNumberHandling.AllowNamedFloatingPointLiterals; //Allow NANs
string jsonString = JsonSerializer.Serialize(obj, options);
return jsonString;
}
小开 
using System.Text.Json;
...
var parsedJson = JsonSerializer.Deserialize<ExpandoObject>(json);
var options = new JsonSerializerOptions() { WriteIndented = true };
return JsonSerializer.Serialize(parsedJson, options);
小开

2023年更新

对于那些问我如何使用c#在. net中获得格式化JSON并希望看到如何立即使用它和一行的恋人的人。以下是缩进的JSON字符串一行代码:

有两种知名的JSON格式化器或解析器可以序列化:

Newtonsoft Json。净版:

using Newtonsoft.Json;


var jsonString = JsonConvert.SerializeObject(yourObj, Formatting.Indented);

.Net 7版本:

using System.Text.Json;


var jsonString = JsonSerializer.Serialize(yourObj, new JsonSerializerOptions { WriteIndented = true });

提交答案