首页 \ 问答 \ 使用JSON.NET与ExpandableObjectConverter的问题(Problems using JSON.NET with ExpandableObjectConverter)

使用JSON.NET与ExpandableObjectConverter的问题(Problems using JSON.NET with ExpandableObjectConverter)

 我定义了以下类： 
 

<TypeConverter(GetType(ExpandableObjectConverter))>
<DataContract()>
Public Class Vector3

   <DataMember()> Public Property X As Double
   <DataMember()> Public Property Y As Double
   <DataMember()> Public Property Z As Double

   Public Overrides Function ToString() As String

      Return String.Format("({0}, {1}, {2})",
                           Format(X, "0.00"),
                           Format(Y, "0.00"),
                           Format(Z, "0.00"))

   End Function

End Class

 

 使用DataContractJsonSerializer我按预期收到以下JSON： 
 

{
  "Vector": {
    "X": 1.23,
    "Y": 4.56,
    "Z": 7.89
  }
}

 

 但是，JSON.NET产生： 
 

{
  "Vector": "(1.23, 4.56, 7.89)"
}

 

 如果我从类中删除ExpandableObjectConverter属性，JSON.NET会按预期生成结果（与DataContractJsonSerializer相同）。 
 

 不幸的是，我需要ExpandableObjectConverter以便该类使用属性网格。 
 

 有没有办法告诉JSON.NET忽略ExpandableObjectConverters ？ 
 

 我更喜欢使用JSON.NET而不是DataContractJsonSerializer因为将枚举序列化为字符串表示要容易得多。 

I have the following class defined:
 

<TypeConverter(GetType(ExpandableObjectConverter))>
<DataContract()>
Public Class Vector3

   <DataMember()> Public Property X As Double
   <DataMember()> Public Property Y As Double
   <DataMember()> Public Property Z As Double

   Public Overrides Function ToString() As String

      Return String.Format("({0}, {1}, {2})",
                           Format(X, "0.00"),
                           Format(Y, "0.00"),
                           Format(Z, "0.00"))

   End Function

End Class

 

Using the DataContractJsonSerializer I receive the following JSON as expected:
 

{
  "Vector": {
    "X": 1.23,
    "Y": 4.56,
    "Z": 7.89
  }
}

 

However, JSON.NET produces:
 

{
  "Vector": "(1.23, 4.56, 7.89)"
}

 

If I remove the ExpandableObjectConverter attribute from the class, JSON.NET produces results as expected (same as DataContractJsonSerializer).
 

Unfortunately I need the ExpandableObjectConverter so that the class works with a property grid.
 

Is there any way to tell JSON.NET to ignore ExpandableObjectConverters?
 

I prefer to use JSON.NET instead of DataContractJsonSerializer because it is much easier to serialize enums to their string representations.

原文：https://stackoverflow.com/questions/17560085
更新时间：2022-12-25 22:12

最满意答案

 以为我会回答我自己的问题。 由于我正在寻找一个简单的解决方案，以下是这样的： 
 

import java.applet.Applet;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;

public class Square extends Applet{
    int size;
    Color color;
    JButton plus, minus, reset, changeColor, alternate; int shapeDetector;
    public void init(){
        color = Color.GREEN;
        size = 100;
        shapeDetector = 1;
        plus = new JButton("+");
        minus = new JButton("-");
        reset = new JButton("reset");
        changeColor = new JButton("color");
        alternate = new JButton("alternate");
        setLayout(new FlowLayout());
        add(plus); add(minus); add(reset); add(changeColor); add(alternate);
        plus.addActionListener(new ButtonHandler(this));
        minus.addActionListener(new ButtonHandler(this));
        reset.addActionListener(new ButtonHandler(this));
        alternate.addActionListener(new ButtonHandler(this));
        changeColor.addActionListener(new ButtonHandler(this));
    }

    public void paint(Graphics g){
        super.paint(g);
        g.setColor(color);
        if(shapeDetector==1)
            g.fillRect(20, 20, size, size);
        else
            g.drawRect(20, 20, size, size);
    }

    class ButtonHandler implements ActionListener{
        Square myApplet;
        ButtonHandler(Square sq){
            this.myApplet = sq;
        }
        public void actionPerformed(ActionEvent e){
            if(e.getSource()==myApplet.plus)
                myApplet.size+=10;
            if(e.getSource()==myApplet.minus)
                myApplet.size-=10;
            if(e.getSource()==myApplet.reset)
                myApplet.size=100;
            if(e.getSource()==myApplet.changeColor){
                if(myApplet.color==Color.GREEN)
                    myApplet.color=Color.RED;
                else
                    myApplet.color=Color.GREEN;
            }
            if(e.getSource()==myApplet.alternate){
                if(myApplet.shapeDetector==1)
                    myApplet.shapeDetector=2;
                else
                    myApplet.shapeDetector=1;
            }
            myApplet.repaint();
        }
    }
}

 

 注意：有更好的方法可以做到这一点。 

Thought i'd post the answer to my own question. As i was looking for a simple solution, the following does this: 
 

import java.applet.Applet;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;

public class Square extends Applet{
    int size;
    Color color;
    JButton plus, minus, reset, changeColor, alternate; int shapeDetector;
    public void init(){
        color = Color.GREEN;
        size = 100;
        shapeDetector = 1;
        plus = new JButton("+");
        minus = new JButton("-");
        reset = new JButton("reset");
        changeColor = new JButton("color");
        alternate = new JButton("alternate");
        setLayout(new FlowLayout());
        add(plus); add(minus); add(reset); add(changeColor); add(alternate);
        plus.addActionListener(new ButtonHandler(this));
        minus.addActionListener(new ButtonHandler(this));
        reset.addActionListener(new ButtonHandler(this));
        alternate.addActionListener(new ButtonHandler(this));
        changeColor.addActionListener(new ButtonHandler(this));
    }

    public void paint(Graphics g){
        super.paint(g);
        g.setColor(color);
        if(shapeDetector==1)
            g.fillRect(20, 20, size, size);
        else
            g.drawRect(20, 20, size, size);
    }

    class ButtonHandler implements ActionListener{
        Square myApplet;
        ButtonHandler(Square sq){
            this.myApplet = sq;
        }
        public void actionPerformed(ActionEvent e){
            if(e.getSource()==myApplet.plus)
                myApplet.size+=10;
            if(e.getSource()==myApplet.minus)
                myApplet.size-=10;
            if(e.getSource()==myApplet.reset)
                myApplet.size=100;
            if(e.getSource()==myApplet.changeColor){
                if(myApplet.color==Color.GREEN)
                    myApplet.color=Color.RED;
                else
                    myApplet.color=Color.GREEN;
            }
            if(e.getSource()==myApplet.alternate){
                if(myApplet.shapeDetector==1)
                    myApplet.shapeDetector=2;
                else
                    myApplet.shapeDetector=1;
            }
            myApplet.repaint();
        }
    }
}

 

note: there are better ways of doing this.

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