第一个Json.Net Demo

 //序列化
      private void btnShow_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            DataColumn dcName = new DataColumn("Name");
            DataColumn dcAge = new DataColumn("Age");
            DataColumn dcCity = new DataColumn("City");

            dt.Columns.Add(dcName);
            dt.Columns.Add(dcAge);
            dt.Columns.Add(dcCity);
            for (int i = 0; i < 10; i++)
            {
                DataRow dr = dt.NewRow();
                dr[0] = "Name" + i;
                dr[1] = "Age" + i;
                dr[2] = "City" + i;
                dt.Rows.Add(dr);
            }
            string json = JsonConvert.SerializeObject(dt);
            Console.WriteLine(json);
            richTextBox1.Text = json;
        }
        //反序列化
      private void button1_Click(object sender, EventArgs e)
        {
            string json = richTextBox1.Text;
            DataTable dt1 = JsonConvert.DeserializeObject<DataTable>(json);
            for (int i = 0; i < dt1.Rows.Count; i++)
            {
                DataRow dr = dt1.Rows[i];
                Console.WriteLine("{0}	{1}	{2}	", dr[0], dr[1], dr[2]);
            }
            dataGridView1.DataSource = dt1;
        }