我认为的大多数样本似乎很难理解,至少它在哪里连线的地方.我基本上试图拥有一个可定位的盒子(“花名册”)和单位列表(“参加者”).目标是能够将任何单位拖入框中,并将它们添加到数据库中的名单中.
有没有人知道一些更简单的示例,可能会揭示如何使用ASP.NET MVC这一部分的jQuery?
例如,我一直在看着http://philderksen.com/2009/06/18/drag-and-drop-categorized-item-list-with-jquery-and-aspnet-mvc-part-1/,它很整洁,但它并没有解释我需要什么.它没有太多的意义,大部分的代码很漂亮,我甚至不能追踪到某些调用的位置,弄清楚事情是如何连线的. (jQuery如何调用Controller操作,例如,当某些东西被删除时触发?如何获取被拖动的项目的ID,以便我可以将它添加到目标?)
在这里,我做了一些改变 – 我为此感到歉意.它仍然是不正常的工作,我如何试图得到它.如果事情重新排列在原始列表中,但是只有当放在另一个列表上时,是否可能不会触发事件?
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<Draggable.Item>>" %> <asp:Content ContentPlaceHolderID="TitleContent" runat="server"> Index </asp:Content> <asp:Content ContentPlaceHolderID="MainContent" runat="server"> <h2> Index</h2> <div style="float: left; width: 250px;"> <ul class="itemBox"> <% foreach (var item in Model) { %> <% Html.RenderPartial("Item",item); %> <% } %> </ul> </div> <div style="float: left; width: 250px;"> <ul class="itemBox"> <p> Drop here</p> </ul> </div> </asp:Content> <asp:Content ContentPlaceHolderID="ScriptContent" runat="server"> <style type="text/css"> #draggable { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; } #droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; } </style> <script type="text/javascript"> $(function() { $(".itemList").sortable({ connectWith: ".itemList",containment: "document",cursor: "move",opacity: 0.8,placeholder: "itemRowPlaceholder",update: function(event,ui) { //Extract column num from current div id var colNum = $(this).attr("id").replace(/col_/,""); $.post("/Home/UpdateSortOrder",{ columnNum: colNum,sectionIdQueryString: $(this).sortable("serialize") }); } }); }); </script> </asp:Content>
好的,我试图跟随菲尔的指示,这是我到目前为止…我希望我甚至在正确的轨道上.这对我来说都很新鲜我正在努力尝试,但是’更新’的东西从来不会被触发. . .
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<Draggable.Item>>" %> <asp:Content ContentPlaceHolderID="TitleContent" runat="server"> Index </asp:Content> <asp:Content ContentPlaceHolderID="MainContent" runat="server"> <h2> Index</h2> <div style="float: left; width: 250px;"> <ul id="sortable" class="itemBox"> <% foreach (var item in Model) { %> <% Html.RenderPartial("Item",item); %> <% } %> </ul> </div> <div id="droppable" class="ui-widget-header"> <p> Drop here</p> </div> </asp:Content> <asp:Content ContentPlaceHolderID="ScriptContent" runat="server"> <style type="text/css"> .draggable { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; } #droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; } </style> <script type="text/javascript"> $(function() { $("#sortable").sortable({ update: function(event,ui) { //Extract column num from current div id var colNum = $(this).attr("id").replace(/item_/,""); $.post("UpdateSortOrder",sectionIdQueryString: $(this).sortable("serialize") }); } }); $("#droppable").droppable({ drop: function(event,ui) { $(this).find('p').html('Dropped!'); //Extract column num from current div id var colNum = $(this).attr("id").replace(/item_/,sectionIdQueryString: $(this).sortable("serialize") }); } }); }); </script> </asp:Content>
和Item.ascx
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Draggable.Item>" %> <li class="itemRow" id="item_<%= Model.ItemId %>"> <p>Drag me to my target</p> </li>
和存储库…
using System; using System.Linq; namespace Draggable { public partial class ItemRepository { DatabaseDataContext database = new DatabaseDataContext(); public IQueryable<Item> GetItems() { var items = from i in database.Items select i; return items; } } }
和控制器
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using System.Web.Mvc.Ajax; namespace Draggable.Controllers { public class HomeController : Controller { // // GET: /Index/ public ActionResult Index() { ItemRepository repository = new ItemRepository(); return View("Index",repository.GetItems()); } public ActionResult Item() { return View(); } } }
这种方法可以使样式更接近样品的样式,但实际上并不奏效.它没有得到元素的id – 但是使得元素本身可排序似乎不起作用.
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<Draggable.Item>>" %> <asp:Content ContentPlaceHolderID="TitleContent" runat="server"> Index </asp:Content> <asp:Content ContentPlaceHolderID="MainContent" runat="server"> <h2> Index</h2> <div class="itemBox"> <ul class="itemList"> <% foreach (var item in Model) { %> <% Html.RenderPartial("Item",item); %> <% } %> </ul> </div> <div class="itemBox"> <ul class="itemList"> <p> Drop here</p> </ul> </div> </asp:Content> <asp:Content ContentPlaceHolderID="ScriptContent" runat="server"> <script type="text/javascript"> $(function() { $(".itemList").sortable({ connectWith: ".itemList",""); alert(colNum); $.post("/Home/UpdateSortOrder",sectionIdQueryString: $(this).sortable("serialize") }); } }); }); </script> </asp:Content>
解决方法
对于初学者,我使用Firebug’s logging功能调试事件.下面是使用jQuery UI的sortable()方法测试事件的示例:
$("#mylist").sortable( { ... start: function(event,ui) { console.log("-- start fired --"); console.log($(ui.item)); },ui) { console.log("-- update fired --"); console.log($(ui.item)); },deactivate: function(event,ui) { console.log("-- deactivate fired --"); console.log($(ui.item)); } });
当使用sortable()删除一个项目时,它会触发更新事件.我使用jQuery的AJAX post方法将数据发送到控制器.
$("#mylist").sortable( { ... update: function(event,ui) { //Extract column num from current div id var colNum = $(this).attr("id").replace(/col_/,""); $.post("/Section/UpdateSortOrder",sectionIdQueryString: $(this).sortable("serialize") }); } });
变量colNum通过解析视图中设置的id属性来提取ID.请参阅我的博客上的part 3,了解如何呈现.然后将列号和段id的集合(在jquery中序列化)都发布到控制器.
控制器方法驻留在/Controllers/SectionController.cs中,只接受帖子:
private SectionRepository secRepo = new SectionRepository(); [AcceptVerbs(HttpVerbs.Post)] public ActionResult UpdateSortOrder(int columnNum,string sectionIdQueryString) { string[] separator = new string[2] { "section[]=","&" }; string[] sectionIdArray = sectionIdQueryString.Split(separator,StringSplitOptions.RemoveEmptyEntries); secRepo.UpdateSortOrder(columnNum,sectionIdArray); secRepo.Save(); return Content("Success"); }
希望有所帮助.