jQuery实现简单的点赞效果

namespace MvcAjaxAdd.Models 
{ 
 public class ClickCountModel 
 { 
 [Key] 
 [DatabaseGeneratedAttribute(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity)] 
 public int ID { get; set; } 
 
 public string URL { get; set; } 
 
 public int? Num { get; set; } 
 } 
} 

@{ 
 ViewBag.Title = "Index"; 
} 
@model MvcAjaxAdd.Models.ClickCountModel 
<script src="~/Scripts/jquery-1.7.1.js" type="text/javascript"></script> 
<script type="text/javascript"> 
 $(function () { 
 var obj = { 
  "num": $("#lblnum").text(), 
  "url": window.location.pathname//获取/Home/Index 
 }; 
 $("#addnum").click(function () { 
  $.ajax({ 
  type: 'POST', 
  url: '/Home/ClickGood', 
  data: obj, 
  success: function (data) { 
   $("#lblnum").text(data.Num); 
   //其它操作，比如每个登录用户只能点一次，按钮禁用等 
  } 
  }); 
 }); 
 }); 
</script> 
<div id="addnum" style="width: 70px; height: 70px; background-color: #FF9900"> 
 <div align="center" style="margin-top: 10px;"> 
 <label style="color: White; font-size: 20pt;"> 
  顶</label></div> 
 <div align="center"> 
 <label id="lblnum" style="color: White; font-size: 10pt;"> 
  @Model.Num</label></div> 
</div> 

namespace MvcAjaxAdd.Controllers 
{ 
 public class HomeController : Controller 
 { 
 private ClickCountContext db = new ClickCountContext(); 
 
 public ActionResult Index() 
 { 
  ClickCountModel ClickCountModel = db.ClickCountModels.FirstOrDefault(x => x.URL == "/"); 
  return View(ClickCountModel); 
 } 
 
 [HttpPost] 
 public JsonResult ClickGood(ClickCountModel ClickCountModel) 
 { 
  ClickCountModel newClickCountModel = db.ClickCountModels.FirstOrDefault(x => x.URL == ClickCountModel.URL); 
  newClickCountModel.Num++;//数量+1 
  db.SaveChanges(); 
  return Json(newClickCountModel); 
 } 
 } 
}