.NET后台将列表数据转换为JSON后前端JavaScript调用

 //C#后台代码  
    
 public string ReturnType()
    
     {
    
         DataTable TypeList = ClassOrAboutBLL.Instance.Type();
    
         List<ClassOrAboutModel> list = new List<ClassOrAboutModel>();
    
  
    
         foreach (DataRow item in TypeList.Rows)
    
         {
    
  
    
             ClassOrAboutModel model = new ClassOrAboutModel();
    
  
    
             model.ClassOrAboutType = item["ClassOrAbout"].ToString();
    
             model.Type = item["Type"].ToString();
    
             model.TypeDescibe = item["TypeDescibe"].ToString();
    
             list.Add(mod