MVC4做网站后台:栏目管理2、修改栏目

接上节添加栏目。

修改栏目与添加栏目非常相似，主要区别在于先向视图传递要修改栏目的model。另外在保存时比添加栏目验证要更多一些。

1、要验证父栏目不能是其本身；

2、父栏目不能是其子栏目；

3、父栏目不能是单页栏目

4、父栏目不能是外部链接

……

另外还有一个ParentParth字段，如果父栏目修改了，其本身和所有子栏目的该字段都要修改。

那么先在控制器中添加一个局部视图action

/// <summary>
        /// 修改栏目
        /// </summary>
        /// <param name="id">栏目Id</param>
        /// <returns>局部视图</returns>
        public PartialViewResult Modify(int id)
        {
            return PartialView(categoryRepository.Find(id));
        }

再添加其视图，内容基本同，添加栏目

@model Ninesky.Models.Category

<div class="c_navbar">栏目管理 >> 修改栏目</div>
@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()
    <div class="fs_wapper">
        <div class="header">修改栏目</div>@Html.HiddenFor(model => model.CategoryId)
        @Html.ValidationSummary()
        <table class="fieldset">
            <tr>
                <th>@Html.LabelFor(model => model.Name)<span>*</span></th>
                <td>@Html.EditorFor(model => model.Name)
                    @Html.ValidationMessageFor(model => model.Name)
                    @Html.DisplayDescriptionFor(model => model.Name)</td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.ParentId)<span>*</span></th>
                <td>
                    <input id="ParentId" name="ParentId" style="width: 200px;" data-url="@Url.Action("Tree", "Category")" value="@Model.ParentId" />
                    @Html.ValidationMessageFor(model => model.ParentId)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.Type)<span>*</span></th>
                <td>
                    <input id="Type" name="Type" value="@Model.Type" />
                    @Html.ValidationMessageFor(model => model.Type)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.Model)<span>*</span></th>
                <td>
                    <input id="Model" name="Model" value="@Model.Model" data-url="@Url.Action("Items", "Module", new { id = 1 })" />
                     @Html.ValidationMessageFor(model => model.Model)
                    @Html.DisplayDescriptionFor(model => model.Model)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.CategoryView)<span>*</span></th>
                <td>
                    <input id="CategoryView" class="easyui-combobox" name="CategoryView" data-options="valueField:'Name',textField:'Name',url:'@Url.Action("Views", "View", new { controllerName="Category" })'" value="@Model.CategoryView">
                    @Html.ValidationMessageFor(model => model.CategoryView)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.ContentView)<span>*</span></th>
                <td>
                    <input id="ContentView" class="easyui-combobox" name="ContentView" data-url="@Url.Action("Views", "View")" data-options="valueField:'Name',textField:'Name',url:'@Url.Action("Views", "View", new { controllerName="Article" })'" value="@Model.ContentView">
                    @Html.ValidationMessageFor(model => model.ContentView)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.LinkUrl)<span>*</span></th>
                <td>
                    @Html.EditorFor(model => model.LinkUrl)
                    @Html.ValidationMessageFor(model => model.LinkUrl)
                    @Html.DisplayDescriptionFor(model => model.LinkUrl)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.Order)<span>*</span></th>
                <td>
                    @Html.EditorFor(model => model.Order)
                    @Html.ValidationMessageFor(model => model.Order)
                    @Html.DisplayDescriptionFor(model => model.Order)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.ContentOrder)<span>*</span></th>
                <td>
                    <input id="ContentOrder" name="ContentOrder" class="easyui-combobox" style="width: 200px;"
                        data-options="url:'@Url.Action("OrderList", "Item", new {area="" })',valueField:'Value',textField:'Name'" value="@Model.ContentOrder" />
                    @Html.ValidationMessageFor(model => model.ContentOrder)
                    @Html.DisplayDescriptionFor(model => model.ContentOrder)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.PageSize)<span>*</span></th>
                <td>
                    @Html.EditorFor(model => model.PageSize)
                    @Html.ValidationMessageFor(model => model.PageSize)
                    @Html.DisplayDescriptionFor(model => model.PageSize)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.RecordUnit)<span>*</span></th>
                <td>
                    @Html.EditorFor(model => model.RecordUnit)
                    @Html.ValidationMessageFor(model => model.RecordUnit)
                    @Html.DisplayDescriptionFor(model => model.RecordUnit)
                </td>
            </tr>
            <tr>
                <th>@Html.LabelFor(model => model.RecordName)<span>*</span></th>
                <td>
                    @Html.EditorFor(model => model.RecordName)
                    @Html.ValidationMessageFor(model => model.RecordName)
                    @Html.DisplayDescriptionFor(model => model.RecordName)
                </td>
            </tr>
            <tr>
                <th></th>
                <td>
                    <a id="CategoryModify_Save" href="javascript:void()" class="easyui-linkbutton">修改</a>
                </td>
            </tr>
        </table>
    </div>
    @Scripts.Render("~/Areas/Admin/Scripts/Category.js");
    <script type="text/javascript">
        CategoryModify_Ready();
    </script>
    @Scripts.Render("~/bundles/jqueryval")

js代码与add类似，粘贴了，看代码吧。

效果

重点是，后台处理代码。

首先考虑在父栏目修改时要更改其子栏目的所有ParentParth字段。

首先打开Ninesky.Areas.Admin.Repository.InterfaceCategory接口。

添加函数

/// <summary>
        /// 修改子栏目父路径
        /// </summary>
        /// <param name="originalParth">原路径</param>
        /// <param name="newParh">新路径</param>
        /// <returns>布尔值。true表示添加成功，false表示失败。</returns>
        bool ChangeChildrenParentParth(string originalParth, string newParh);

Ninesky.Areas.Admin.Repository.CategoryRepository写其实现代码。

public bool ChangeChildrenParentParth(string originalParth, string newParh)
        {
            using (NineskyContext _nineskyContext = new NineskyContext())
            {
                var _children = _nineskyContext.Categorys.Where(c => c.ParentPath.IndexOf(originalParth) == 0);
                foreach(var _child in _children)
                {
                    _child.ParentPath = _child.ParentPath.Replace(originalParth, newParh);
                }
                return _nineskyContext.SaveChanges() > 0;
            }
        }

下面就是做控制器的修改处理action了。都写了注释就不解释了。

[HttpPost]
        public JsonResult Modify(Category category)
        {

            JsonViewModel _jdata = new JsonViewModel();
            if (ModelState.IsValid)//模型验证通过
            {
                var _category = categoryRepository.Find(category.CategoryId);
                //父栏目
                if (category.ParentId == 0) category.ParentPath = "0";
                else
                {
                    var _parentCategory = categoryRepository.Find(category.ParentId);
                    if (_parentCategory == null) ModelState.AddModelError("ParentId", "父栏目不存在。");
                    else if (_parentCategory.Type != 0) ModelState.AddModelError("ParentId", "父栏目不是常规栏目，不能添加子栏目。");
                    //此处验证父栏目不能是其本身
                    else if (category.ParentId  == category.CategoryId) ModelState.AddModelError("ParentId", "父栏目不能是其本身。");
                    //此处验证父栏目不能是其子栏目
                    else if (_parentCategory.ParentPath.IndexOf(_category.ParentPath + "," + _category.CategoryId) == 0) ModelState.AddModelError("ParentId", "父栏目不能是其子栏目。");
                    //设置父栏目路径
                    else category.ParentPath = _parentCategory.ParentPath + "," + _parentCategory.CategoryId;
                }
                //根据栏目类型验证字段
                switch (category.Type)
                {
                    case 0://常规栏目
                        if (string.IsNullOrEmpty(category.Model))//模型为空
                        {
                            category.ContentView = category.LinkUrl = category.RecordUnit = category.RecordName = null;
                            category.ContentOrder = category.PageSize = null;
                        }
                        else
                        {
                            if (string.IsNullOrEmpty(category.CategoryView)) ModelState.AddModelError("CategoryView", "栏目视图不能为空。");
                            if (string.IsNullOrEmpty(category.ContentView)) ModelState.AddModelError("ContentView", "内容视图不能为空。");
                            if (category.ContentOrder == null) ModelState.AddModelError("ContentOrder", "内容排序方式不能为空。");
                            if (category.PageSize == null) ModelState.AddModelError("PageSize", "每页记录数不能为空。");
                            if (string.IsNullOrEmpty(category.RecordUnit)) ModelState.AddModelError("RecordUnit", "记录单位不能为空。");
                            if (string.IsNullOrEmpty(category.RecordName)) ModelState.AddModelError("RecordName", "记录名称不能为空。");
                            category.LinkUrl = null;
                        }
                        break;
                    case 1://单页栏目
                        if (categoryRepository.Children(category.CategoryId).Count() != 0) ModelState.AddModelError("Type", "存在子栏目，无法将栏目类型设为单页栏目。");
                        if (string.IsNullOrEmpty(category.CategoryView)) ModelState.AddModelError("CategoryView", "栏目视图不能为空。");
                        category.Model = category.ContentView = category.LinkUrl = category.RecordUnit = category.RecordName = null;
                        category.ContentOrder = category.PageSize = null;
                        break;
                    case 2:
                        if (categoryRepository.Children(category.CategoryId).Count() != 0) ModelState.AddModelError("Type", "存在子栏目，无法将栏目类型设为外部链接。");
                        if (string.IsNullOrEmpty(category.LinkUrl)) ModelState.AddModelError("LinkUrl", "链接地址不能为空。");
                        category.Model = category.CategoryView = category.ContentView = category.RecordUnit = category.RecordName = category.ContentView = null;
                        category.ContentOrder = category.PageSize = null;
                        break;
                }
                //存在逻辑验证错误
                if (!ModelState.IsValid) return Json(new JsonViewModel(ModelState));
                else
                {
                    if (categoryRepository.Modify(category))
                    {
                        //判断父栏目是否更改
                        if (category.ParentId != _category.ParentId) categoryRepository.ChangeChildrenParentParth(_category.ParentPath + "," + category.CategoryId, category.ParentPath + "," + category.CategoryId);
                        return Json(new JsonViewModel() { Success = true, Message = "修改栏目成功！" });
                    }
                    else return Json(new JsonViewModel() { Success = false, Message = "数据未发生更改。" });
                }
            }
            //模型验证失败
            else return Json(new JsonViewModel(ModelState));
        }

 

代码见网盘或群Ninesky2013-12-06.rar