MVC4制作网站教程第四章 浏览栏目4.2

序

一、用户

二、用户组

三、栏目

3.1添加栏目

3.2浏览栏目

浏览栏目这块做个一个树形列表，添加栏目的左侧部分只写了句“左侧列表”就是指这个树形列表，等我们写完替换一下就可以了。

先在【CategoryController】里面添加[ManagePartialTree]action，这里的Partial用来说明是分部视图

/// <summary>    /// 栏目列表局部树视图    /// </summary>    /// <returns></returns>    [AdminAuthorize]    public ActionResult ManagePartialTree()    {      return View();    }

右键添加分部视图ManagePartialTree.cshtml。分部视图里用easyui的tree来显示栏目，使用异步加载，视图代码只有一行。

代码如下:<ul id="ctree" class="easyui-tree" data-options="url:'@Url.Action("ManageTreeChildrenJson", "Category")'"></ul>
这里从[anageTreeChildrenJson]action获取的json数据。

在【CategoryController】添加JsonResult类型的[anageTreeChildrenJson]

/// <summary>    /// 子栏目树形控件Json数据    /// </summary>    /// <param name="id">栏目id</param>    /// <returns></returns>    [AdminAuthorize]    public JsonResult ManageTreeChildrenJson(int id = 0)    {      categoryRsy = new CategoryRepository();      var _children = categoryRsy.Children(id);      List<Tree> _trees = new List<Tree>(_children.Count());      foreach(var c in _children)      {        Tree _t = new Tree { id = c.CategoryId, text = c.Name};        switch (c.Type)        {          case 0:            _t.state = "closed";            _t.iconCls = "icon-general";            break;          case 1:            _t.state = "open";            _t.iconCls = "icon-page";            break;          case 2:            _t.state = "open";            _t.iconCls = "icon-link";            break;        }        _trees.Add(_t);      }      return Json(_trees, JsonRequestBehavior.AllowGet);    }

这里默认id=0，根据id查找子栏目，然后遍历子栏目生成树的节点数据。

switch (c.Type) 是根据栏目类型不同来，来设置节点状态并，设置不同的图标。最后以Json类型返回。

修改一下上一节中添加栏目的视图ManageAdd.cshtml，将左侧列表替换成@Html.Action("ManagePartialTree", "Category")。替换后ManageAdd.cshtml

@model Ninesky.Models.Category@{  ViewBag.Title = "ManageAdd";  Layout = "~/Views/Layout/_Manage.cshtml";}<div class="workspace">  <div class="inside">    <div class="notebar">      <img alt="" src="~/Skins/Default/Manage/Images/Category.gif" />添加栏目    </div>    @using (Html.BeginForm())    {      @Html.ValidationSummary(true)      <fieldset>        <legend>栏目</legend>        <ul>          <li>            <div class="editor-label">              @Html.LabelFor(model => model.Type)            </div>            <div class="editor-field">              @Html.DropDownList("Type")              @Html.ValidationMessageFor(model => model.Type)              @Html.DisplayDescriptionFor(model => model.Type)            </div>          </li>          <li>            <div class="editor-label">              @Html.LabelFor(model => model.Name)            </div>            <div class="editor-field">              @Html.EditorFor(model => model.Name)              @Html.ValidationMessageFor(model => model.Name)              @Html.DisplayDescriptionFor(model => model.Name)            </div>          </li>          <li>            <div class="editor-label">              @Html.LabelFor(model => model.ParentId)            </div>            <div class="editor-field">              @Html.TextBox("ParentId", 0, new { @class = "easyui-combotree", data_options = "url:'" + Url.Action("JsonTreeParent", "Category") + "'" })              @Html.ValidationMessageFor(model => model.ParentId)              @Html.DisplayDescriptionFor(model => model.ParentId)            </div>          </li>          <li id="li_model">            <div class="editor-label">              @Html.LabelFor(model => model.Model)            </div>            <div class="editor-field">              @Html.DropDownList("Model")              @Html.ValidationMessageFor(model => model.Model)              @Html.DisplayDescriptionFor(model => model.Model)            </div>          </li>          <li id="li_categoryview">            <div class="editor-label">              @Html.LabelFor(model => model.CategoryView)            </div>            <div class="editor-field">              @Html.EditorFor(model => model.CategoryView)              @Html.ValidationMessageFor(model => model.CategoryView)              @Html.DisplayDescriptionFor(model => model.CategoryView)            </div>          </li>          <li id="li_contentview">            <div class="editor-label">              @Html.LabelFor(model => model.ContentView)            </div>            <div class="editor-field">              @Html.EditorFor(model => model.ContentView)              @Html.ValidationMessageFor(model => model.ContentView)              @Html.DisplayDescriptionFor(model => model.ContentView)            </div>          </li>          <li id="li_nav">            <div class="editor-label">              @Html.LabelFor(model => model.Navigation)            </div>            <div class="editor-field">              @Html.EditorFor(model => model.Navigation)              @Html.ValidationMessageFor(model => model.Navigation)              @Html.DisplayDescriptionFor(model => model.Navigation)            </div>          </li>          <li>            <div class="editor-label">              @Html.LabelFor(model => model.Order)            </div>            <div class="editor-field">              @Html.EditorFor(model => model.Order, new { value = 0 })              @Html.ValidationMessageFor(model => model.Order)              @Html.DisplayDescriptionFor(model => model.Order)            </div>          </li>          <li>            <div class="editor-label">            </div>            <div class="editor-field">              <input type="submit" value="添加" />            </div>          </li>        </ul>      </fieldset>    }  </div></div><div class="left">  <div class="top"></div>    @Html.Action("ManagePartialTree", "Category")</div><div class="split"></div><div class="clear"></div><script type="text/javascript">  Details();  $("#Type").change(function () {    Details();  });  function Details() {    var v = $("#Type").val();    if (v == "0") {      $("#li_model").show();      $("#li_categoryview").show();      $("#li_contentview").show();      $("#li_nav").hide();    }    else if (v == "1") {      $("#li_model").hide();      $("#li_categoryview").show();      $("#li_contentview").hide();      $("#li_nav").hide();    }    else if (v == "2") {      $("#li_model").hide();      $("#li_categoryview").hide();      $("#li_contentview").hide();      $("#li_nav").show();    }  }</script>@section Scripts {  @Styles.Render("~/EasyUi/icon")  @Scripts.Render("~/bundles/EasyUi")  @Scripts.Render("~/bundles/jqueryval")}