需求:页面上有dropdown之类的控件,当选择里面不同值的时候,下面关联的内容跟着改变。
思路:把与 dropdown关联的会改变的内容放到PartialView(ascx)里,用JQuery绑定dropdown的change事件,当选择值改变时,用JQuery ajax请求与PartialView相关的Action,得到数据后讲取到的内容覆盖原来的内容。
实现:
Model 类:
public class User { public string UserName { get; set; } public int Age { get; set; } public int UserID { get; set; } public static List<User> GetUsers() { List<User> userList = new List<User>(); User user = null; user = new User(); user.UserID = 1; user.UserName = "小明"; user.Age = 20; userList.Add(user); user = new User(); user.UserID = 2; user.UserName = "小红"; user.Age = 21; userList.Add(user); user = new User(); user.UserID = 3; user.UserName = "小强"; user.Age = 22; userList.Add(user); return userList; } public static User GetUserById(int userId) { return GetUsers().SingleOrDefault(u=>u.UserID==userId); } }
我们的PartialView:
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<MvcApplication2.Models.User>" %> <div> <%if (Model != null) {%> 用户名:<%=Model.UserName%><br /> 年龄:<%=Model.Age%> <%} %> </div>
主页面:
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<MvcApplication2.Models.User>" %> <asp:Content ContentPlaceHolderID="TitleContent" runat="server"> Index </asp:Content> <asp:Content ContentPlaceHolderID="MainContent" runat="server"> <h2>Index</h2> <%=Html.DropDownList("users", ViewData["users"] as List<SelectListItem>)%> <div> <%Html.RenderPartial("UserDetails", Model); %> </div> </asp:Content> <asp:Content ContentPlaceHolderID="HeadMeta" runat="server"> <script language="javascript" src="https://www.jb51.net/Scripts/user.js" type="text/javascript"></script> </asp:Content>
Controller类:
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using MvcApplication2.Models; namespace MvcApplication2.Controllers { public class UserController : Controller { public ActionResult Index() { List<SelectListItem> userIdList = new List<SelectListItem>(); foreach (MvcApplication2.Models.User item in MvcApplication2.Models.User.GetUsers()) { userIdList.Add(new SelectListItem { Text = item.UserName,Value = item.UserID.ToString()}); } ViewData["users"] = userIdList; MvcApplication2.Models.User user = MvcApplication2.Models.User.GetUsers().FirstOrDefault(); return View(user); } public PartialViewResult UserDetails(int? userId) { MvcApplication2.Models.User user = null; if (userId == null) { user = MvcApplication2.Models.User.GetUsers().FirstOrDefault(); } else { user = MvcApplication2.Models.User.GetUserById(userId.Value); } return PartialView(user); } } }
我们需要在Master页里指定我们的PartialView对应的Action路径,这样实现:
在Head里加上如下代码:
<script language="javascript" type="text/javascript"> mySite = { actions : { userDetails: '<%=Url.Action("UserDetails","User")%>' } }; </script>
我们对应的JS代码:
$(document).ready(function () { $("#users").change(function () { dropDownChange(); }); }); function dropDownChange() { var userId = $("#users").val(); $.ajax({ type: "POST", url: mySite.actions.userDetails, data: { userId: userId }, success: function (data) { $("#userDetails").html(data); } }); }
这样就实现了选择相应的user,显示对应的详细信息了。
只是一个简单的Demo,希望对需要此功能的人起到帮助作用。
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