可排序,可拖动,可排序的表格+ MVC无法正确更新订单

时间:2018-10-01 19:28:32

标签: c# asp.net-mvc jquery-ui-sortable draggable

我正在尝试向我的视图添加可排序的表。在View New.cshtml中进行排序时,可以进行排序。它使用jQuerys sortable。如果我添加了一些说明(在这种情况下为1-5),那么由于可排序的脚本,我可以移动它们。但是,当我尝试在重新排序后添加新指令时,其顺序从:

enter image description here

enter image description here

我想这与隐藏表单有关

@Html.HiddenFor(m => m.Recipe.Instructions[i].Number, new { @id = "Number"})

当我对可排序表中的字段重新排序时,它需要更新其值。

我在这里想念什么?

RecipeController.cs

public ActionResult Create(NewRecipeViewModel viewModel, string command)
{

//...more code...

    var instructionList = new List<Instruction>();

    if (viewModel.Recipe.Instructions != null)
    {
        for (int i = 0; i < viewModel.Recipe.Instructions.Count; i++)
        {
            var instruction = new Instruction
            {
                Id = viewModel.Recipe.Instructions[i].Id,
                Name = viewModel.Recipe.Instructions[i].Name,
                Number = viewModel.Recipe.Instructions[i].Number

            };
            instructionList.Add(instruction);
        }
    }

    if (command.Equals("AddInstruction"))
    {
        var instruction = new Instruction
        {
            Name = viewModel.NewInstruction.Name,
            Number = viewModel.Recipe.Instructions.Count + 1
        };

        recipe.Instructions.Add(instruction);
        viewModel.Recipe = recipe;

        return View("New", viewModel);
    }

//...more code...
}

New.cshtml

<div class="form-group" style="margin-top: 170px;">
    <label class="col-md-2 control-label">
        Lägg till instruktion:
    </label>
    <div class="col-md-10">
        @Html.TextBoxFor(m => m.NewInstruction.Name, new { @class = "form-control" })
    </div>
</div>
<div class="form-group" style="margin-top: 300px;">
    <label class="col-md-2 control-label">
    </label>
    <div class="col-md-10">
        <button type="submit" name="command" value="AddInstruction" class="btn btn-primary">Add instruction</button>
    </div>
</div>
<div class="form-group" style="margin-top: 100px;">

    <label class="col-md-2 control-label">
        Instructions:
    </label>
    <div class="col-md-10">
        <table class="table table-bordered table-hover pagin-table" style="margin-top: 10px">
            <thead>
                <tr bgcolor="#f5f5f5">
                    <th>Order:</th>
                    <th>Instruction:</th>
                </tr>
            </thead>
            <tbody id="sortable">
                @if (Model.Recipe.Instructions != null)
                {
                    for (int i = 0; i < Model.Recipe.Instructions.Count; i++)
                    {
                        <tr>
                            @Html.HiddenFor(m => Model.Recipe.Instructions[i].Id)
                            <td class="order">
                                @Model.Recipe.Instructions[i].Number
                                @Html.HiddenFor(m => m.Recipe.Instructions[i].Number, new { @id = "Number"})
                            </td>
                            <td>
                                @Model.Recipe.Instructions[i].Name
                                @Html.HiddenFor(m => m.Recipe.Instructions[i].Name)
                            </td>
                        </tr>
                    }
                }
            </tbody>
        </table>
    </div>
</div>
 <script type="text/javascript">
     $(document).ready(function() {
             $('#sortable').sortable({
                 update : function(event, ui) { 
                     $('td.order').each(function(index) {
                        var order = index + 1;
                        $(this).find('span').text(order);
                        $(this).find('.Number').val(order);
                     });
                 }
             });
     });
 </script

编辑: 已添加

instructionList.Sort((s1, s2) => s1.Number.CompareTo(s2.Number));

到RecipeController.cs。其余的归功于斯蒂芬·穆克。

RecipeController.cs

public ActionResult Create(NewRecipeViewModel viewModel, string command)
{

//...more code...

    var instructionList = new List<Instruction>();

    if (viewModel.Recipe.Instructions != null)
    {
        for (int i = 0; i < viewModel.Recipe.Instructions.Count; i++)
        {
            var instruction = new Instruction
            {
                Id = viewModel.Recipe.Instructions[i].Id,
                Name = viewModel.Recipe.Instructions[i].Name,
                Number = viewModel.Recipe.Instructions[i].Number

            };
            instructionList.Add(instruction);
        }
        instructionList.Sort((s1, s2) => s1.Number.CompareTo(s2.Number));
    }

//...more code...
}

New.cshtml

 @* More code *@
 <td class="order">
      <span>@Model.Recipe.Instructions[i].Number</span>
      @Html.HiddenFor(m => m.Recipe.Instructions[i].Number, new {@class = "Number"})
 </td>

 @* More code *@    

 <script type="text/javascript">
     $(document).ready(function() {
             $('#sortable').sortable({
                 update : function(event, ui) { 
                     $('td.order').each(function(index) {
                        var order = index + 1;
                        $(this).find('span').text(order);
                        $(this).find('.Number').val(order);
                     });
                 }
             });
     });
 </script

2 个答案:

答案 0 :(得分:1)

您在update函数中的选择器不正确,将返回undefined(您缺少#(id选择器),并且在任何情况下,$都会创建一个jQuery对象,因此它将是.val(...),而不是value=...

但是使用$('#Number').val(index + 1)不能正常工作,因为它只会更新具有id="Number". Duplicate id`属性的第一个元素是无效的html。

使用类名和相对选择器代替。将html更改为

<td class="order">
    <span>@Model.Recipe.Instructions[i].Number</span>
    @Html.HiddenFor(m => m.Recipe.Instructions[i].Number, new { @class = "Number"})
</td>

然后是脚本

$('#sortable').sortable({
    update : function(event, ui) { 
        $('td.order').each(function(index) {
            var order = index + 1;
            $(this).find('span').text(order );
            $(this).find('.Number').val(order );
        });
    }
});

答案 1 :(得分:0)

在您的标记中,将Model更改为您的'Html.HiddenFor()'HTML帮助器中的投影变量m

<tr>
    @Html.HiddenFor(m => m.Recipe.Instructions[i].Id)
    <td class="order">
        @Model.Recipe.Instructions[i].Number
        @Html.HiddenFor(m => m.Recipe.Instructions[i].Number, new { @id = "Number"})
    </td>
    <td>
        @Model.Recipe.Instructions[i].Name
        @Html.HiddenFor(m => m.Recipe.Instructions[i].Name)
    </td>
</tr>