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);
    }
}

<%@ 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>

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<MvcApplication2.Models.User>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
  Index
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
  <h2>Index</h2>
  <%=Html.DropDownList("users", ViewData["users"] as List<SelectListItem>)%>
  <div id="userDetails">
    <%Html.RenderPartial("UserDetails", Model); %>
  </div>
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="HeadMeta" runat="server">
  <script language="javascript" src="/UploadFiles/2021-04-02/user.js">

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"htmlcode">

<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。
更多关于jQuery相关内容感兴趣的读者可查看本站专题：《jquery中Ajax用法总结》、《jQuery表格(table)操作技巧汇总》、《jQuery拖拽特效与技巧总结》、《jQuery扩展技巧总结》、《jQuery常见经典特效汇总》、《jQuery动画与特效用法总结》、《jquery选择器用法总结》及《jQuery常用插件及用法总结》
希望本文所述对大家jQuery程序设计有所帮助。