通过Json字典在C＃中序列化字典

问题描述

如何在JSON中定义可以在C＃中解析的字典？

这是我需要解析的Json：

  "InputRequest": 
        {
            "Switches":  {"showButton": true}
        }

这是我的例子：

 public class InputRequest
{
    [JsonProperty(PropertyName="Switches")]
    public ReadOnlyDictionary<string,bool> Switches { get; }
}

由于某种原因，它无法解析，并显示null参数的Switches值。

我拥有的另一种方法是创建一个新参数，并将字典作为字符串：

 public class InputRequest
{
    [JsonProperty(PropertyName="Switches")]
    public string Switches { get; }

    public ReadOnlyDictionary<string,bool> SwitchesDictionary 
    {
          var values = JsonConvert.DeserializeObject<ReadOnlyDictionary<string,bool>>(Switches);
          return values;
    }
}

对于这种方法，它显示错误

解析开关值时遇到意外字符

我在这里做错了什么？

解决方法

您使用的是只读集合，但没有提供设置器。

将您的集合类型更改为类似于普通的# -*- coding: utf-8 -*- from kivy.app import App from kivy.lang import Builder from kivy.uix.boxlayout import BoxLayout from kivy.uix.recycleview import RecycleView from kivy.uix.recycleview.views import RecycleDataViewBehavior from kivy.uix.label import Label from kivy.properties import BooleanProperty,StringProperty,NumericProperty from kivy.uix.recycleboxlayout import RecycleBoxLayout from kivy.uix.behaviors import FocusBehavior from kivy.uix.recycleview.layout import LayoutSelectionBehavior kv = """ <SelectableLabel>: # Draw a background to indicate selection canvas.before: Color: rgba: (0.4,0.4,1) if self.selected else (0.5,0.5,1) Rectangle: pos: self.pos size: self.size <KivyPlayer>: canvas: Color: rgba: 0.3,0.3,1 Rectangle: size: self.size pos: self.pos orientation: 'vertical' BoxLayout: orientation: 'vertical' BoxLayout: Button: id: next_track text: "Next Track" on_release: controller.select_next() Button: id: previous_track text: "Previous Track" on_release: controller.select_previous() BoxLayout: RecycleView: id: media_list viewclass: 'SelectableLabel' scroll_type: ['bars','content'] scroll_wheel_distance: dp(114) bar_width: dp(10) SelectableRecycleBoxLayout: id: controller key_selection: 'selectable' default_size: None,dp(56) default_size_hint: 1,None size_hint_y: None height: self.minimum_height orientation: 'vertical' # multiselect: True touch_multiselect: True spacing: dp(2) """ Builder.load_string(kv) class SelectableRecycleBoxLayout(FocusBehavior,LayoutSelectionBehavior,RecycleBoxLayout): ''' Adds selection and focus behaviour to the view. ''' # required to forbid unselecting a selected item. An item can be unselected # only by selecting another item touch_deselect_last = BooleanProperty(False) def get_nodes(self): nodes = self.get_selectable_nodes() if self.nodes_order_reversed: nodes = nodes[::-1] if not nodes: return None,None selected = self.selected_nodes if not selected: # nothing selected,select the first self.select_node(nodes[0]) return None,None if len(nodes) == 1: # the only selectable node is selected already return None,None last = nodes.index(selected[-1]) self.clear_selection() return last,nodes def select_next(self): last,nodes = self.get_nodes() if not nodes: return if last == len(nodes) - 1: self.select_node(nodes[0]) else: self.select_node(nodes[last + 1]) def select_previous(self): last,nodes = self.get_nodes() if not nodes: return if not last: self.select_node(nodes[-1]) else: self.select_node(nodes[last - 1]) class SelectableLabel(RecycleDataViewBehavior,Label): ''' Add selection support to the Label ''' index = None selected = BooleanProperty(False) selectable = BooleanProperty(True) def refresh_view_attrs(self,rv,index,data): ''' Catch and handle the view changes ''' self.index = index return super(SelectableLabel,self).refresh_view_attrs( rv,data) def on_touch_down(self,touch): ''' Add selection on touch down ''' if super(SelectableLabel,self).on_touch_down(touch): return True if self.collide_point(*touch.pos) and self.selectable: return self.parent.select_with_touch(self.index,touch) def apply_selection(self,is_selected): ''' Respond to the selection of items in the view. ''' self.selected = is_selected if is_selected: print("selection changed to {0}".format(rv.data[index])) else: print("selection removed for {0}".format(rv.data[index])) class KivyPlayer(BoxLayout): ''' Main Kivy class for creating the initial BoxLayout ''' def __init__(self,**kwargs): super(KivyPlayer,self).__init__(**kwargs) # Set media_list data self.ids.media_list.data = [{'text': str(x),'selectable': True} for x in range(100)] class KivyApp(App): def build(self): return KivyPlayer() KivyApp().run() 并将其初始化为反序列化器可以向其中添加内容的集合，或者将Dictionary<string,bool>添加到您的属性中，以便反序列化器可以设置值到它创建的新集合中。

set;

OR

public ReadOnlyDictionary<string,bool> Switches { get; set; }

,

JSON.NET寻找“ Switches”，但是您可能正在寻找“ InputRequest.Switches”。尝试将“ Switches”对象放在全局空间中，如下所示：

{
   "Switches":  
   {
       "showButton": true
   }
}

然后，您可以像以下示例一样将JSON字符串反序列化为InputRequest对象：

string json = "{\"Switches\": { \"showButton\": true } }";
var myObject = JsonConvert.DeserializeObject<InputRequest>(json);

更新：

您的ReadOnlyDictionary<string,bool>没有设置器，您需要添加一个这样的设置器：

public ReadOnlyDictionary<string,bool> Switches { get; set; }