在 C# 中迭代 JSON 对象
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Iterating over JSON object in C#
提问by require_once
I am using JSON.NET in C# to parse a response from the Klout API. My response is like this:
我在 C# 中使用 JSON.NET 来解析来自 Klout API 的响应。我的回答是这样的：
[
{
"id": "5241585099662481339",
"displayName": "Music",
"name": "music",
"slug": "music",
"imageUrl": "http://kcdn3.klout.com/static/images/music-1333561300502.png"
},
{
"id": "6953585193220490118",
"displayName": "Celebrities",
"name": "celebrities",
"slug": "celebrities",
"imageUrl": "http://kcdn3.klout.com/static/images/topics/celebrities_b32741b6703151cc7bd85fba24c44c52.png"
},
{
"id": "5757029936226020304",
"displayName": "Entertainment",
"name": "entertainment",
"slug": "entertainment",
"imageUrl": "http://kcdn3.klout.com/static/images/topics/Entertainment_7002e5d2316e85a2ff004fafa017ff44.png"
},
{
"id": "3718",
"displayName": "Saturday Night Live",
"name": "saturday night live",
"slug": "saturday-night-live",
"imageUrl": "http://kcdn3.klout.com/static/images/icons/generic-topic.png"
},
{
"id": "8113008320053776960",
"displayName": "Hollywood",
"name": "hollywood",
"slug": "hollywood",
"imageUrl": "http://kcdn3.klout.com/static/images/topics/hollywood_9eccd1f7f83f067cb9aa2b491cd461f3.png"
}
]
As you see, it contains 5 idtags. Maybe next time it would be 6 or 1 or some other number. I want to iterate over the JSON and get the value of each idtag. I can't run a loop without knowing how many there will be. How can I solve this?
如您所见，它包含 5 个id标签。也许下次它会是 6 或 1 或其他一些数字。我想遍历 JSON 并获取每个id标签的值。我无法在不知道会有多少循环的情况下运行循环。我该如何解决这个问题？
采纳答案by L.B
dynamic dynJson = JsonConvert.DeserializeObject(json);
foreach (var item in dynJson)
{
Console.WriteLine("{0} {1} {2} {3}\n", item.id, item.displayName,
item.slug, item.imageUrl);
}
or
或者
var list = JsonConvert.DeserializeObject<List<MyItem>>(json);
public class MyItem
{
public string id;
public string displayName;
public string name;
public string slug;
public string imageUrl;
}
回答by reticent
You can use the JsonTextReaderto read the JSON and iterate over the tokens:
您可以使用JsonTextReader来读取 JSON 并遍历令牌：
using (var reader = new JsonTextReader(new StringReader(jsonText)))
{
while (reader.Read())
{
Console.WriteLine("{0} - {1} - {2}",
reader.TokenType, reader.ValueType, reader.Value);
}
}
回答by Markus
This worked for me, converts to nested JSON to easy to read YAML
这对我有用，转换为嵌套的 JSON 以易于阅读 YAML
string JSONDeserialized {get; set;}
public int indentLevel;
private bool JSONDictionarytoYAML(Dictionary<string, object> dict)
{
bool bSuccess = false;
indentLevel++;
foreach (string strKey in dict.Keys)
{
string strOutput = "".PadLeft(indentLevel * 3) + strKey + ":";
JSONDeserialized+="\r\n" + strOutput;
object o = dict[strKey];
if (o is Dictionary<string, object>)
{
JSONDictionarytoYAML((Dictionary<string, object>)o);
}
else if (o is ArrayList)
{
foreach (object oChild in ((ArrayList)o))
{
if (oChild is string)
{
strOutput = ((string)oChild);
JSONDeserialized += strOutput + ",";
}
else if (oChild is Dictionary<string, object>)
{
JSONDictionarytoYAML((Dictionary<string, object>)oChild);
JSONDeserialized += "\r\n";
}
}
}
else
{
strOutput = o.ToString();
JSONDeserialized += strOutput;
}
}
indentLevel--;
return bSuccess;
}
usage
用法
Dictionary<string, object> JSONDic = new Dictionary<string, object>();
JavaScriptSerializer js = new JavaScriptSerializer();
try {
JSONDic = js.Deserialize<Dictionary<string, object>>(inString);
JSONDeserialized = "";
indentLevel = 0;
DisplayDictionary(JSONDic);
return JSONDeserialized;
}
catch (Exception)
{
return "Could not parse input JSON string";
}
