mvc问题有问必答，欢迎加群：

一、本文目标

学会制做MVC的管理相关功能

二、本文目录

1.查询

2.修改

3.删除

4.代码下载

1.查询

1) View代码：

@model PagedList<MVC3.DemoModel.User> 2 @using Webdiyer.WebControls.Mvc; 3 @using (Html.BeginForm("Main", "Manage", FormMethod.Get)) 4 { 5     <span>用户名：</span> 6     @Html.TextBox("username", ViewData["username"]) 7     <input type="submit" value="查询" /> 8 } 9 @foreach (MVC3.DemoModel.User user in Model)10 {11     @user.UserID<span>---</span>@user.UserName<span>---</span> 12     @Html.ActionLink("修改", "UserEdit", new { id = user.UserID }) <span>---</span> 13     @Html.ActionLink("详细", "UserDetail", new { id = user.UserID }) <span>---</span> 14     @Html.ActionLink("删除", "UserRemove", new { id = user.UserID })<span>---</span> 15 16     <br />17 }18 <br />19 <br />20 @Html.Pager(Model, new PagerOptions21 {22     PageIndexParameterName = "id",23     ShowPageIndexBox = true,24     FirstPageText = "首页",25     PrevPageText = "上一页",26     NextPageText = "下一页",27     LastPageText = "末页",28     PageIndexBoxType = PageIndexBoxType.TextBox,29     PageIndexBoxWrapperFormatString = "请输入页数{0}",30     GoButtonText = "转到"31 })32 <br />33 >>分页 共有 @Model.TotalItemCount 篇留言 @Model.CurrentPageIndex/@Model.TotalPageCount

2）Control代码：

        public ActionResult Main(int? id = 1) 2         { 3             ViewData["username"] = string.Empty; 4             if (Request.QueryString["username"] != null) 5             { 6                 ViewData["username"] = Request.QueryString["username"].ToString(); 7             } 8             List<Model.User> userList = new List<Model.User>(); 9             int totalCount = 0;10             int pageIndex = id ?? 1;11             userList = DemoRepository.User.GetList(ViewData["username"].ToString(), 2, (pageIndex - 1) * 2, out totalCount);12             PagedList<Model.User> mPage = userList.AsQueryable().ToPagedList(0, 2);13             mPage.TotalItemCount = totalCount;14             mPage.CurrentPageIndex = (int)(id ?? 1);15             return View(mPage);16         }

3)代码解释：由于mvcPager渲染到客户端后为<a href="Manage/Main/1">下一页</a>，所以在查询时只能以get的方式向服务器提交查询条件，在View的代码中我们要修改Form的提交方式

@using (Html.BeginForm("Main", "Manage", FormMethod.Get))

并且接收到参数后还要回显到文本框中，在Control与View间我们使用ViewData["username"]做数据传递。

4)效果如下：

2.修改

1) View代码：

@model MVC3.DemoModel.User 2 @using (Html.BeginForm()) 3 { 4     @Html.LabelFor(user => user.UserName) 5     <br /> 6     @Html.TextBoxFor(user => user.UserName) 7     <br /> 8     @Html.LabelFor(user => user.Phone) 9     <br />10     @Html.TextBoxFor(user => user.Phone)11     <br />12     @Html.LabelFor(user => user.Residential)13     @Html.DropDownListFor(user => user.Residential, (SelectList)ViewBag.ViewResidential)14     @Html.LabelFor(user => user.UnitNo)15     @Html.DropDownListFor(user => user.UnitNo, (SelectList)ViewBag.ViewUnitNo)16     @Html.LabelFor(user => user.FloorNo)17     @Html.DropDownListFor(user => user.FloorNo, (SelectList)ViewBag.ViewFloorNo)18     @Html.LabelFor(user => user.DoorplateNo)19     @Html.DropDownListFor(user => user.DoorplateNo, (SelectList)ViewBag.ViewDoorplateNo)20     <br />21     @Html.HiddenFor(user => user.UserID)22     <input type="submit" value="修改" />23 }

2)Control代码：

        public ActionResult UserEdit(int id) 2         { 3             //取出用户信息 4             if (id != 0) 5             { 6                 Model.User user = DemoRepository.User.Get(new Model.User() { UserID = id }); 7  8                 //取出数据，并通过Helper把数据分解 9                 AddressHelper addressHelper = AddressHelper.GetInstance();10                 addressHelper.GetResidetialItem(GetList());11                 //反选并使用ViewBag传到View12                 ViewBag.ViewResidential = new SelectList(addressHelper.ResidetialItem, "Value", "Text", user.Residential);13                 ViewBag.ViewFloorNo = new SelectList(addressHelper.FloorNoItem, "Value", "Text", user.FloorNo);14                 ViewBag.ViewUnitNo = new SelectList(addressHelper.UnitNoItem, "Value", "Text", user.UnitNo);15                 ViewBag.ViewDoorplateNo = new SelectList(addressHelper.DoorplateNoItem, "Value", "Text", user.DoorplateNo);16                 return View(user);17             }18             return View();19         }

3) 代码解释：

ViewBag.ViewResidential = new SelectList(addressHelper.ResidetialItem, "Value", "Text", user.Residential);

是为了把数据库中的数据反选到View上

4)运行效果：

3.删除

1)View代码：

 @Html.ActionLink("删除", "UserRemove", new { id = user.UserID }, new { @onclick = "return confirm('确定删除吗?');" })<span>---</span> 

2)Control代码

        //删除用户2         public void UserRemove(int id, FormCollection formCollection)3         {4             Model.User user = new Model.User() { UserID = id };5             DemoRepository.User.Remove(user);6             MessageBox.ShowAndRedirect(this, "删除成功！", "/Manage/Main/");7         }

3)代码解释：

View中加了“确认删除吗？”对话框。

Ciontrol中：int id, FormCollection formCollection：以HttpPost的方式进行删除。

4)运行效果：

4.代码下载

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