ASP.NET MVC5网站开发修改及删除文章(十)

前端技术 2023/08/31 .NET

上次做了显示文章列表,再实现修改和删除文章这部分内容就结束了,这次内容比较简单,由于做过了添加文章,修改文章非常类似,就是多了一个TryUpdateModel部分更新模型数据。
一、删除文章
由于公共模型跟,文章,附件有关联,所以这里的删除次序很重要,如果先删除模型,那么文章ModelID和附件的ModelID多会变成null,所以要先先删除文章和附件再删除公共模型。

由于公共模型和附件是一对多的关系,我们把删除公共模型和删除附件写在一起。

在BLL的BaseRepository类中有默认的Delete方法,但这个方法中仅删除模型,不会删除外键,所以在CommonModelRepository在new一个出来封印掉默认的方法。

public new bool Delete(Models.CommonModel commonModel, bool isSave = true)
  {
   if (commonModel.Attachment != null) nContext.Attachments.RemoveRange(commonModel.Attachment);
   nContext.CommonModels.Remove(commonModel);
   return isSave ? nContext.SaveChanges() > 0 : true;
  }

这个的意思是封印掉继承的Delete方法,在新的方法中如果存在附加那么先删除附件,再删除公共模型。那么如果我们还想调用基类的Delete方法怎么办?可以用base.Delete。

好了,现在可以开始删除了。

在ArticleController中添加Delete方法

/// <summary>
  /// 删除
  /// </summary>
  /// <param name=\"id\">文章id</param>
  /// <returns></returns>
  public JsonResult Delete(int id)
  {
   //删除附件
   var _article = articleService.Find(id);
   if(_article == null) return Json(false);
   //附件列表
   var _attachmentList = _article.CommonModel.Attachment;
   var _commonModel = _article.CommonModel;
   //删除文章
   if (articleService.Delete(_article))
   {
    //删除附件文件
    foreach (var _attachment in _attachmentList)
    {
     System.IO.File.Delete(Server.MapPath(_attachment.FileParth));
    }
    //删除公共模型
    commonModelService.Delete(_commonModel);
    return Json(true);
   }
   else return Json(false);
  }

二、修改文章
这个部分跟添加文章非常类似
首先在ArticleController中添加显示编辑视图的Edit

/// <summary>
  /// 修改
  /// </summary>
  /// <param name=\"id\"></param>
  /// <returns></returns>
  public ActionResult Edit(int id)
  {
   return View(articleService.Find(id));
  }

右键添加视图,这个跟添加类似,没什么好说的直接上代码

@section scripts{
 <script type=\"text/javascript\" src=\"~/Scripts/KindEditor/kindeditor-min.js\"></script>
 <script type=\"text/javascript\">
  //编辑框
  KindEditor.ready(function (K) {
   window.editor = K.create(\'#Content\', {
    height: \'500px\',
    uploadJson: \'@Url.Action(\"Upload\", \"Attachment\")\',
    fileManagerJson: \'@Url.Action(\"FileManagerJson\", \"Attachment\", new { id = @Model.CommonModel.ModelID })\',
    allowFileManager: true,
    formatUploadUrl: false
   });
  //首页图片
   var editor2 = K.editor({
    fileManagerJson: \'@Url.Action(\"FileManagerJson\", \"Attachment\", new {id=@Model.CommonModel.ModelID })\'
   });
   K(\'#btn_picselect\').click(function () {
    editor2.loadPlugin(\'filemanager\', function () {
     editor2.plugin.filemanagerDialog({
      viewType: \'VIEW\',
      dirName: \'image\',
      clickFn: function (url, title) {
       var url;
       $.ajax({
        type: \"post\",
        url: \"@Url.Action(\"CreateThumbnail\", \"Attachment\")\",
        data: { originalPicture: url },
        async: false,
        success: function (data) {
         if (data == null) alert(\"生成缩略图失败!\");
         else {
          K(\'#CommonModel_DefaultPicUrl\').val(data);
          K(\'#imgpreview\').attr(\"src\", data);
         }
         editor2.hideDialog();
        }
       });
      }
     });
    });
   });
  });
 </script>
}

@model Ninesky.Models.Article
@using (Html.BeginForm())
{ @Html.AntiForgeryToken()
 <div class=\"form-horizontal\" role=\"form\">
  <h4>添加文章</h4>
  <hr />
  @Html.ValidationSummary(true)
  <div class=\"form-group\">
   <label class=\"control-label col-sm-2\" for=\"CommonModel_CategoryID\">栏目</label>
   <div class=\"col-sm-10\">
    <input id=\"CommonModel_CategoryID\" name=\"CommonModel.CategoryID\" data-options=\"url:\'@Url.Action(\"JsonTree\", \"Category\", new { model=\"Article\" })\'\" class=\"easyui-combotree\" style=\"height: 34px; width: 280px;\" value=\"@Model.CommonModel.CategoryID\" />
      @Html.ValidationMessageFor(model => model.CommonModel.CategoryID)</div>
  </div>
  <div class=\"form-group\">
   @Html.LabelFor(model => model.CommonModel.Title, new { @class = \"control-label col-sm-2\" })
   <div class=\"col-sm-10\">
      @Html.TextBoxFor(model => model.CommonModel.Title, new { @class = \"form-control\" })
      @Html.ValidationMessageFor(model => model.CommonModel.Title)</div>
  </div>


  <div class=\"form-group\">
   @Html.LabelFor(model => model.Author, new { @class = \"control-label col-sm-2\" })
   <div class=\"col-sm-10\">
    @Html.TextBoxFor(model => model.Author, new { @class = \"form-control\" })
    @Html.ValidationMessageFor(model => model.Author)
   </div>
  </div>

  <div class=\"form-group\">
   @Html.LabelFor(model => model.Source, new { @class = \"control-label col-sm-2\" })
   <div class=\"col-sm-10\">
    @Html.TextBoxFor(model => model.Source, new { @class = \"form-control\" })
    @Html.ValidationMessageFor(model => model.Source)
   </div>
  </div>

  <div class=\"form-group\">
   @Html.LabelFor(model => model.Intro, new { @class = \"control-label col-sm-2\" })
   <div class=\"col-sm-10\">
    @Html.TextAreaFor(model => model.Intro, new { @class = \"form-control\" })
    @Html.ValidationMessageFor(model => model.Intro)
   </div>
  </div>

  <div class=\"form-group\">
   @Html.LabelFor(model => model.Content, new { @class = \"control-label col-sm-2\" })
   <div class=\"col-sm-10\">
    @Html.EditorFor(model => model.Content)
    @Html.ValidationMessageFor(model => model.Content)
   </div>
  </div>

  <div class=\"form-group\">
   @Html.LabelFor(model => model.CommonModel.DefaultPicUrl, new { @class = \"control-label col-sm-2\" })
   <div class=\"col-sm-10\">
    <img id=\"imgpreview\" class=\"thumbnail\" src=\"@Model.CommonModel.DefaultPicUrl\" />
    @Html.HiddenFor(model => model.CommonModel.DefaultPicUrl)
    <a id=\"btn_picselect\" class=\"easyui-linkbutton\">选择…</a>
    @Html.ValidationMessageFor(model => model.CommonModel.DefaultPicUrl)
   </div>
  </div>

  <div class=\"form-group\">
   <div class=\"col-sm-offset-2 col-sm-10\">
    <input type=\"submit\" value=\"保存\" class=\"btn btn-default\" />
   </div>
  </div>
 </div>
}

开始做后台接受代码,在ArticleController中添加如下代码。

[HttpPost]
  [ValidateInput(false)]
  [ValidateAntiForgeryToken]
  public ActionResult Edit()
  {
   int _id = int.Parse(ControllerContext.RouteData.GetRequiredString(\"id\"));
   var article = articleService.Find(_id);
   TryUpdateModel(article, new string[] { \"Author\", \"Source\", \"Intro\", \"Content\" });
   TryUpdateModel(article.CommonModel, \"CommonModel\", new string[] { \"CategoryID\", \"Title\", \"DefaultPicUrl\" });
   if(ModelState.IsValid)
   {
    if (articleService.Update(article))
    {
     //附件处理
     InterfaceAttachmentService _attachmentService = new AttachmentService();
     var _attachments = _attachmentService.FindList(article.CommonModel.ModelID, User.Identity.Name, string.Empty,true).ToList();
     foreach (var _att in _attachments)
     {
      var _filePath = Url.Content(_att.FileParth);
      if ((article.CommonModel.DefaultPicUrl != null && article.CommonModel.DefaultPicUrl.IndexOf(_filePath) >= 0) || article.Content.IndexOf(_filePath) > 0)
      {
       _att.ModelID = article.ModelID;
       _attachmentService.Update(_att);
      }
      else
      {
       System.IO.File.Delete(Server.MapPath(_att.FileParth));
       _attachmentService.Delete(_att);
      }
     }
     return View(\"EditSucess\", article);
    }
   }
   return View(article);
  }

详细讲解一下吧:

1、[ValidateInput(false)] 表示不验证输入内容。因为文章内容包含html代码,防止提交失败。

2、[ValidateAntiForgeryToken]是为了防止伪造跨站请求的,也就说只有本真的请求才能通过。

见图中的红线部分,在试图中构造验证字符串,然后再后台验证。

3、public ActionResult Edit()。看这个方法没有接收任何数据,我们再方法中使用TryUpdateModel更新模型。因为不能完全相信用户,比如如果用户构造一个CateggoryID过来,就会把文章发布到其他栏目去。

这个是在路由中获取id参数

再看这两行,略有不同
第一行直接更新article模型。第一个参数是要更新的模型,第二个参数是更新的字段。
第二行略有不同,增加了一个前缀参数,我们看视图生成的代码 @Html.TextBoxFor(model => model.CommonModel.Title 是带有前缀CommonModel的。所以这里必须使用前缀来更新视图。

三、修改文章列表
写完文章后,就要更改文章列表代码用来删除和修改文章。
打开List视图,修改部分由2处。
1、js脚本部分

<script type=\"text/javascript\">
 $(\"#article_list\").datagrid({
  loadMsg: \'加载中……\',
  pagination:true,
  url: \'@Url.Action(\"JsonList\",\"Article\")\',
  columns: [[
   { field: \'ModelID\', title: \'ID\', checkbox: true },
   { field: \'CategoryName\', title: \'栏目\'},
   { field: \'Title\', title: \'标题\'},
   { field: \'Inputer\', title: \'录入\', align: \'right\' },
   { field: \'Hits\', title: \'点击\', align: \'right\' },
   { field: \'ReleaseDate\', title: \'发布日期\', align: \'right\', formatter: function (value, row, index) { return jsonDateFormat(value); } },
   { field: \'StatusString\', title: \'状态\', width: 100, align: \'right\' }
  ]],
  toolbar: \'#toolbar\',
  idField: \'ModelID\',
  onDblClickRow: function (rowIndex, rowData) { window.parent.addTab(\"修改文章\", \"@Url.Action(\"Edit\",\"Article\")/\" + rowData.ModelID, \"icon-page\"); }
 });
 //查找
 $(\"#btn_search\").click(function () {
  $(\"#article_list\").datagrid(\'load\', {
   title: $(\"#textbox_title\").val(),
   input: $(\"#textbox_inputer\").val(),
   category: $(\"#combo_category\").combotree(\'getValue\'),
   fromDate: $(\"#datebox_fromdate\").datebox(\'getValue\'),
   toDate: $(\"#datebox_todate\").datebox(\'getValue\')
  });
 });

 //修改事件
 function eidt() {
  var rows = $(\"#article_list\").datagrid(\"getSelections\");
  if (!rows || rows.length < 1) {
   $.messager.alert(\"提示\", \"请选择要修改的行!\");
   return;
  }
  else if (rows.length != 1) {
   $.messager.alert(\"提示\", \"仅能选择一行!\");
   return;
  }
  else {
   window.parent.addTab(\"修改文章\", \"@Url.Action(\"Edit\",\"Article\")/\" + rows[0].ModelID, \"icon-page\");
  }
 }
 //删除
 function del()
 {
  var rows = $(\"#article_list\").datagrid(\"getSelections\");
  if (!rows || rows.length < 1) {
   $.messager.alert(\"提示\", \"未选择任何行!\");
   return;
  }
  else if (rows.length > 0) {
   $.messager.confirm(\"确认\", \"您确定要删除所选行吗?\", function (r) {
    if (r) {
     $.messager.progress();
     $.each(rows, function (index, value) {
      $.ajax({
       type: \"post\",
       url: \"@Url.Action(\"Delete\", \"Article\")\",
       data: { id: value.ModelID },
       async: false,
       success: function (data) {
       }
      });
     });
     $.messager.progress(\'close\');
     //清除选择行
     rows.length = 0;
     $(\"#article_list\").datagrid(\'reload\');
    }
   });
   return;
  }
 }
</script>

增加了修改方法、删除方法,在datagrid里添加行双击进入修改视图的方法

onDblClickRow: function (rowIndex, rowData) { window.parent.addTab(\"修改文章\", \"@Url.Action(\"Edit\",\"Article\")/\" + rowData.ModelID, \"icon-page\"); }

2、

四、我的文章列表
我的文章列表与全部文章类似,并简化掉了部分内容那个,更加简单,直接上代码了
Article控制器中添加

/// <summary>
  /// 文章列表Json【注意权限问题,普通人员是否可以访问?】
  /// </summary>
  /// <param name=\"title\">标题</param>
  /// <param name=\"input\">录入</param>
  /// <param name=\"category\">栏目</param>
  /// <param name=\"fromDate\">日期起</param>
  /// <param name=\"toDate\">日期止</param>
  /// <param name=\"pageIndex\">页码</param>
  /// <param name=\"pageSize\">每页记录</param>
  /// <returns></returns>
  public ActionResult JsonList(string title, string input, Nullable<int> category, Nullable<DateTime> fromDate, Nullable<DateTime> toDate, int pageIndex = 1, int pageSize = 20)
  {
   if (category == null) category = 0;
   int _total;
   var _rows = commonModelService.FindPageList(out _total, pageIndex, pageSize, \"Article\", title, (int)category, input, fromDate, toDate, 0).Select(
    cm => new Ninesky.Web.Models.CommonModelViewModel() 
    { 
     CategoryID = cm.CategoryID,
     CategoryName = cm.Category.Name,
     DefaultPicUrl = cm.DefaultPicUrl,
     Hits = cm.Hits,
     Inputer = cm.Inputer,
     Model = cm.Model,
     ModelID = cm.ModelID,
     ReleaseDate = cm.ReleaseDate,
     Status = cm.Status,
     Title = cm.Title 
    });
   return Json(new { total = _total, rows = _rows.ToList() });
  }

  public ActionResult MyList()
  {
   return View();
  }

  /// <summary>
  /// 我的文章列表
  /// </summary>
  /// <param name=\"title\"></param>
  /// <param name=\"fromDate\"></param>
  /// <param name=\"toDate\"></param>
  /// <param name=\"pageIndex\"></param>
  /// <param name=\"pageSize\"></param>
  /// <returns></returns>
  public ActionResult MyJsonList(string title, Nullable<DateTime> fromDate, Nullable<DateTime> toDate, int pageIndex = 1, int pageSize = 20)
  {
   int _total;
   var _rows = commonModelService.FindPageList(out _total, pageIndex, pageSize, \"Article\", title, 0, string.Empty, fromDate, toDate, 0).Select(
    cm => new Ninesky.Web.Models.CommonModelViewModel()
    {
     CategoryID = cm.CategoryID,
     CategoryName = cm.Category.Name,
     DefaultPicUrl = cm.DefaultPicUrl,
     Hits = cm.Hits,
     Inputer = cm.Inputer,
     Model = cm.Model,
     ModelID = cm.ModelID,
     ReleaseDate = cm.ReleaseDate,
     Status = cm.Status,
     Title = cm.Title
    });
   return Json(new { total = _total, rows = _rows.ToList() }, JsonRequestBehavior.AllowGet);
  }
为MyList右键添加视图
<div id=\"toolbar\">
 <div>
  <a href=\"#\" class=\"easyui-linkbutton\" data-options=\"iconCls:\'icon-edit\',plain:true\" onclick=\"eidt()\">修改</a>
  <a href=\"#\" class=\"easyui-linkbutton\" data-options=\"iconCls:\'icon-remove\',plain:true\" onclick=\"del()\">删除</a>
  <a href=\"#\" class=\"easyui-linkbutton\" data-options=\"iconCls:\'icon-reload\',plain:true\" onclick=\"$(\'#article_list\').datagrid(\'reload\');\">刷新</a>
 </div>
 <div class=\"form-inline\">
  <label>标题</label> <input id=\"textbox_title\" class=\"input-easyui\" style=\"width:280px\" />
  <label>添加日期</label>
  <input id=\"datebox_fromdate\" type=\"datetime\" class=\"easyui-datebox\" style=\"width:120px\" /> -
  <input id=\"datebox_todate\" type=\"datetime\" class=\"easyui-datebox\" style=\"width:120px; \" />
  <a href=\"#\" id=\"btn_search\" data-options=\"iconCls:\'icon-search\'\" class=\"easyui-linkbutton\">查询</a>
 </div>

</div>
<table id=\"article_list\"></table>
<script src=\"~/Scripts/Common.js\"></script>
<script type=\"text/javascript\">
 $(\"#article_list\").datagrid({
  loadMsg: \'加载中……\',
  pagination:true,
  url: \'@Url.Action(\"MyJsonList\", \"Article\")\',
  columns: [[
   { field: \'ModelID\', title: \'ID\', checkbox: true },
   { field: \'CategoryName\', title: \'栏目\'},
   { field: \'Title\', title: \'标题\'},
   { field: \'Inputer\', title: \'录入\', align: \'right\' },
   { field: \'Hits\', title: \'点击\', align: \'right\' },
   { field: \'ReleaseDate\', title: \'发布日期\', align: \'right\', formatter: function (value, row, index) { return jsonDateFormat(value); } },
   { field: \'StatusString\', title: \'状态\', width: 100, align: \'right\' }
  ]],
  toolbar: \'#toolbar\',
  idField: \'ModelID\',
  onDblClickRow: function (rowIndex, rowData) { window.parent.addTab(\"修改文章\", \"@Url.Action(\"Edit\",\"Article\")/\" + rowData.ModelID, \"icon-page\"); }
 });
 //查找
 $(\"#btn_search\").click(function () {
  $(\"#article_list\").datagrid(\'load\', {
   title: $(\"#textbox_title\").val(),
   fromDate: $(\"#datebox_fromdate\").datebox(\'getValue\'),
   toDate: $(\"#datebox_todate\").datebox(\'getValue\')
  });
 });

 //修改事件
 function eidt() {
  var rows = $(\"#article_list\").datagrid(\"getSelections\");
  if (!rows || rows.length < 1) {
   $.messager.alert(\"提示\", \"请选择要修改的行!\");
   return;
  }
  else if (rows.length != 1) {
   $.messager.alert(\"提示\", \"仅能选择一行!\");
   return;
  }
  else {
   window.parent.addTab(\"修改文章\", \"@Url.Action(\"Edit\",\"Article\")/\" + rows[0].ModelID, \"icon-page\");
  }
 }
 //删除
 function del()
 {
  var rows = $(\"#article_list\").datagrid(\"getSelections\");
  if (!rows || rows.length < 1) {
   $.messager.alert(\"提示\", \"未选择任何行!\");
   return;
  }
  else if (rows.length > 0) {
   $.messager.confirm(\"确认\", \"您确定要删除所选行吗?\", function (r) {
    if (r) {
     $.messager.progress();
     $.each(rows, function (index, value) {
      $.ajax({
       type: \"post\",
       url: \"@Url.Action(\"Delete\", \"Article\")\",
       data: { id: value.ModelID },
       async: false,
       success: function (data) {
       }
      });
     });
     $.messager.progress(\'close\');
     //清除选择行
     rows.length = 0;
     $(\"#article_list\").datagrid(\'reload\');
    }
   });
   return;
  }
 }
</script>

要注意的是删除文章时删除的次序,修改文章时TryUpdateModel的使用,希望本文对大家的学习有所帮助。

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