如何使用Newtonsoft递归删除c#中json中的空键
本文关键字:json 何使用 Newtonsoft 递归 删除 | 更新日期: 2023-09-27 18:05:47
{"a":1,"b":{"c":{}},"d":{"e":1、"f":{"g":{}}}
这是一个简单的json,如何从json中递归删除空键所以输出应该在这里
{"a":1,"d":{"e":1}}
我试过的东西removeEmptyDocs(令牌,"{}"(
private void removeEmptyDocs(JToken token, string empty)
{
JContainer container = token as JContainer;
if (container == null) return;
List<JToken> removeList = new List<JToken>();
foreach (JToken el in container.Children())
{
JProperty p = el as JProperty;
if (p != null && empty.Contains(p.Value.ToString()))
{
removeList.Add(el);
}
removeEmptyDocs(el, empty);
}
foreach (JToken el in removeList)
{
el.Remove();
}
}
迭代时不能删除标记,所以应该在收集完所有空叶子后再删除。这是代码,它不是最优的,但它是一个很好的起点。它做了预期的
class Program
{
static void Main(string[] args)
{
var json =
"{'a': 1, 'b': {'c': {}, k: [], z: [1, 3]},'d': {'e': 1,'f': {'g': {}}}}";
var parsed = (JContainer)JsonConvert.DeserializeObject(json);
var nodesToDelete = new List<JToken>();
do
{
nodesToDelete.Clear();
ClearEmpty(parsed, nodesToDelete);
foreach (var token in nodesToDelete)
{
token.Remove();
}
} while (nodesToDelete.Count > 0);
}
private static void ClearEmpty(JContainer container, List<JToken> nodesToDelete)
{
if (container == null) return;
foreach (var child in container.Children())
{
var cont = child as JContainer;
if (child.Type == JTokenType.Property ||
child.Type == JTokenType.Object ||
child.Type == JTokenType.Array)
{
if (child.HasValues)
{
ClearEmpty(cont, nodesToDelete);
}
else
{
nodesToDelete.Add(child.Parent);
}
}
}
}
}