[大数据]C#读写Json文件，实现修改与读取内容

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace 获取指定目录下dll中所有的指定类的方法名
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }



        private void button1_Click(object sender, EventArgs e)
        {
            var targetAssembly = Assembly.Load(File.ReadAllBytes(this.Text));//文件以二进制的方式加载到程序
            var targetType = targetAssembly.GetType(className.Text);//定位指定的类
            var targetMethods = targetType.GetMethods();//定位指定的方法

            listBox1.Items.Clear();
            foreach (var targetMethod in targetMethods)
            {
                if (targetMethod.ToString().Substring(0, 5) != "Void ") continue;               
                listBox1.Items.Add(targetMethod.Name);
            }
            if (listBox1.Items.Count!=0)
            {
                listBox1.SelectedItem = listBox1.Items[listBox1.Items.Count - 1];
                methodName.Text = listBox1.Items[listBox1.Items.Count - 1].ToString();
            }
            readJson();
        }

        private void listBox1_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedItem != null)
            {
                methodName.Text = listBox1.SelectedItem.ToString();
            }
            
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string jsonfile = @"d:\cmd.json";

            StringWriter sw = new StringWriter();
            JsonTextWriter writer = new JsonTextWriter(sw);
            writer.WriteStartObject();  //   {  （Json数据的大括号左边 ）
            writer.WritePropertyName("DllName");
            writer.WriteValue(dllName.Text);
            writer.WritePropertyName("ClassName");
            writer.WriteValue(className.Text);
            writer.WritePropertyName("MethodName");
            writer.WriteValue(methodName.Text);
            writer.WriteEndObject();//}
            StreamWriter wtyeu = new StreamWriter(jsonfile);
            wtyeu.Write(sw);
            wtyeu.Flush();
            wtyeu.Close();

            readJson();
        }
        void readJson()
        {
            string jsonfile = @"d:\cmd.json";
            using (StreamReader file = File.OpenText(jsonfile))
            {
                using (JsonTextReader reader = new JsonTextReader(file))
                {
                    JObject o = (JObject)JToken.ReadFrom(reader);
                    label2.Text = "当前的方法名是:" + o["MethodName"].ToString();
                }

            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            button1_Click( sender,  e);            
        }
    }
}