ExpandoObject动态类生成属性转json

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Dynamic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Web.Script.Serialization;
 using System.Windows.Forms;
 using Newtonsoft.Json;

 namespace WindowsFormsApplication2
 {

     public partial class Form1 : Form
     {
         private List<Test> l = new List<Test>();

         public Form1()
         {
             InitializeComponent();
         }
         private void button3_Click(object sender, EventArgs e)
         {
             List<string> rowname = new List<string>();
             List<string> colname = new List<string>();
             List<IDictionary<String, Object>> l1 = new List<IDictionary<String, Object>>();

             //获得行名称
             ; i < l.Count; i++)
             {
                 bool IsExist = true;
                 ; j < rowname.Count; j++)
                 {
                     if (rowname[j].ToString() == l[i].Name)
                     {
                         IsExist = false;
                         break;
                     }
                 }
                 if (IsExist)
                     rowname.Add(l[i].Name);
             }

            // 获得列名称
             ; i < l.Count; i++)
             {
                 bool IsExist = true;
                 ; j < colname.Count; j++)
                 {
                     if (colname[j].ToString() == l[i].Type.ToString())
                     {
                         IsExist = false;
                         break;
                     }
                 }
                 if (IsExist)
                     colname.Add(l[i].Type.ToString());
             }
             colname.Insert(,"name");

             //数据转换
             ; i < rowname.Count; i++)
             {
                 dynamic exobj = new ExpandoObject();
                 var obj = (IDictionary<String, Object>) exobj;
                 obj.Add("name", rowname[i]);
                 List<Test> t = l.Where(c => c.Name.Equals(rowname[i])).ToList();

                 ; j < t.Count(); j++)
                 {
                     obj.Add(t[j].Type.ToString(), t[j].Money);
                 }
                 l1.Add(obj);
             }

             DataTable dt = new DataTable("dt");

             //创建列
             ; i < colname.Count; i++)
             {
                 dt.Columns.Add(colname[i]);
             }

             //创建行
             ; i < l1.Count; i++)
             {
                 DataRow r = dt.NewRow();
                 ; j < dt.Columns.Count; j++)
                 {
                     r[j] = l1[i][colname[j]];
                 }

                 dt.Rows.Add(r);
             }
             dataGridView2.DataSource = dt;

             ]);
             MessageBox.Show(json1);

         }

         private void Form1_Load(object sender, EventArgs e)
         {
             ; i < ; i++)
             {
                 Test t = new Test();
                 t.Type = ;
                 t.Name = "nametype" + i.ToString();
                 t.Money =  + i;
                 l.Add(t);
             }
             ; i < ; i++)
             {
                 Test t = new Test();
                 t.Type = ;
                 t.Name = "nametype" + i.ToString();
                 t.Money =  + i;
                 l.Add(t);
             }
             ; i < ; i++)
             {
                 Test t = new Test();
                 t.Type = ;
                 t.Name = "nametype" + i.ToString();
                 t.Money =  + i;
                 l.Add(t);
             }

             dataGridView1.DataSource = l;
         }

         public class Test
         {
             public string Name { get; set; }
             public int Type { get; set; }
             public decimal Money { get; set; }
         }
     }
 }