使用 C# 和 JSON.net 读取 JSON 文件
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Reading JSON files with C# and JSON.net
提问by Daniel J?rgensen
Im having some trouble to understand how to use JSON.net to read a json file.
我在理解如何使用 JSON.net 读取 json 文件时遇到了一些麻烦。
The file is looking like this:
该文件如下所示：
"version": {
"files": [
{
"url": "http://www.url.com/",
"name": "someName"
},
{
"name": "someOtherName"
"url": "http://www.url.com/"
"clientreq": true
}, ....
I really do not have much idea how i can read this file .. What i need to do is to read the lines and download the file via the "url".. I know how to download files and so on, but i dont know how i can use JSON.net to read the json file and loop through each section, and download the file..
我真的不知道如何读取这个文件..我需要做的是读取行并通过“url”下载文件..我知道如何下载文件等等，但我不知道我如何使用 JSON.net 读取 json 文件并遍历每个部分，然后下载文件..
Can you assist ?
你能帮忙吗？
采纳答案by Esteban Elverdin
The easiest way is to deserialize your json into a dynamic object like this
最简单的方法是将您的 json 反序列化为这样的动态对象
Then you can access its properties an loop for getting the urls
然后你可以访问它的属性一个用于获取 url 的循环
dynamic result = Newtonsoft.Json.JsonConvert.DeserializeObject(jsonString);
var urls = new List<string>();
foreach(var file in result.version.files)
{
urls.Add(file.url);
}
回答by Tim S.
http://json2csharp.com/helps you create C# classes based on your JSON data type. Once you have your classes to match your data, you can deserialize with Json.NETand then work with your data:
http://json2csharp.com/可帮助您根据 JSON 数据类型创建 C# 类。一旦您的类与您的数据相匹配，您就可以使用Json.NET进行反序列化，然后处理您的数据：
var myMessage = JsonConvert.DeserializeObject<MyMessage>(myString);
foreach (var file in myMessage.Version.Files)
{
// download file.Url
}
Or you can access it as a dynamicobject:
或者您可以将其作为dynamic对象访问：
dynamic myMessage = JsonConvert.DeserializeObject(myString);
foreach (var file in myMessage.version.files)
{
// download file.url
}
If you use classes, they might be:
如果您使用类，它们可能是：
public class File
{
public Uri Url { get; set; }
public string Name { get; set; }
public bool? ClientReq { get; set; }
}
public class Version
{
public IList<File> Files { get; set; }
}
public class MyMessage
{
public Version Version { get; set; }
}
(note that Json.Net is smart enough to map properties where the case is different, and turn the URLs into Uri objects) It works when the string is like:
（请注意，Json.Net 足够智能，可以映射大小写不同的属性，并将 URL 转换为 Uri 对象）它在字符串如下时起作用：
string myString = @"{""version"": {
""files"": [
{
""url"": ""http://www.url.com/"",
""name"": ""someName""
},
{
""name"": ""someOtherName"",
""url"": ""http://www.url.com/"",
""clientreq"": true
}]}}";
