[
  {
    "ID": "0",
    "UserName": "全部"
  },
  {
    "ID": "2",
    "UserName": "小花"
  },
  {
    "ID": "3",
    "UserName": "张三"
  },
  {
    "ID": "4",
    "UserName": "小草"
  },
  {
    "ID": "5",
    "UserName": "小白"
  }
]

//创建一个User(类)
 List<User> users;
 //读取Json文件
 //把Json文件放到当前项目生成文件路径下
 /*
 *选中项目右键点击属性，点生成查看输出路径地址
 */
 users = Common.JsonHelper.FileLoadList<Element.User>(Application.StartupPath + @"\案例.json");

   List<string> 医师List = new List<string>();
   //循环赋值
     for (int i = 0; i < users.Count; i++)
      {
          string 医师 = users[i].UserName;
          医师List.Add(医师);
      }
      //绑定
      labeledCombox_接收医师.DataSource = 医师List;
      //绑定默认值
      labeledCombox_接收医师.EditValue = 医师List[0];
      labeledCombox_核对医师.DataSource = 医师List;

    if (labeledCombox_接收医师.EditValue != null)
      {
          //获取ID
          query.接收医师Id = users.First(s => s.UserName == labeledCombox_接收医师.EditValue.ToString()).Id;
      }