ASP.NET MVC-添加到视图模型列表并提交

问题描述

我有一个带有订单/ odc请求表单的ASP.NET MVC程序。我有一个客户，订单和订单项模型。我想做的是允许用户下订单以批准项目列表。我将viewmodel传递给包含几个字段（包括订单项对象列表）的表单/视图。我能够向显示订单项列表的表中动态添加行，但是在提交时，viewmodel列表中没有任何内容。我究竟做错了什么？如何将输入表中的项目传递到视图，以便可以提交到数据库？

控制器

    public ActionResult NewOdc()
    {
        var viewModel = new NewOdcViewModel()
        {
            OdcItems = new List<tblOdcItem>() 
        };

        viewModel.OdcItems.Add(new tblOdcItem());

        return View(viewModel);
    }

我从jQuery调用此代码以将新项目添加到列表中：

    public ActionResult GetView(string rowCount)
    {
        tblOdcItem item = new tblOdcItem();
        return PartialView("_OdcItemEditor",item);
    }

提交后，我将此代码称为：

    [HttpPost]
    public ActionResult NewOdcSubmit(NewOdcViewModel viewModel)
    {
        _context.tblOdcs.Add(new tblOdc());
        ...

我正在使用foreach浏览列表并为每个项目创建一个局部。

查看：

@using (Html.BeginForm("NewOdcSubmit","Odc",FormMethod.Post))
{
            if (Model != null)
            {
                @Html.HiddenFor(m => m.OdcItems);
            }

            <div class="panel panel-info">
                <div class="panel-heading">
                    <h2 class="panel-title">Enter New ODC</h2>
                </div>
                <div class="panel-body">
                    @Html.AntiForgeryToken()
                    <div class="form-group">
                        @Html.LabelFor(model => model.User.UserName,new { @class = "col-md-2 col-sm-1 control-label" })
                        <div class="col-md-2 col-sm-3">
                            @Html.TextBoxFor(model => model.User.UserName,new { @Value = ((PM_Portal2020.Models.tblUser)Session["User"]).UserName,@readonly = true })
                        </div>
                        @Html.LabelFor(model => model.User.Phone,new { @class = "col-md-2 col-sm-1 control-label" })
                        <div class="col-md-2 col-sm-3">
                            @Html.TextBoxFor(model => model.User.Phone,new { @Value = ((PM_Portal2020.Models.tblUser)Session["User"]).Phone })
                        </div>
                    </div>
                    <div class="form-group col-md-10 col-sm-12">
                        <label>Expenses</label>
                        <table id="submissionTable" class="table table-bordered">
                            <thead>
                                <tr>
                                    <th>Qty</th>
                                    <th>Description</th>
                                    <th>Estimated Cost</th>
                                </tr>
                            </thead>
                            <tbody>
                                @foreach (PM_Portal2020.Models.tblOdcItem item in Model.OdcItems)
                                {
                                    @Html.Partial("_OdcItemEditor",item)
                                }
                            </tbody>
                        </table>
                        <p>
                            <button id="add" type="button" class="btn btn-primary">Add</button>
                        </p>
                    </div>
                    <div class="form-group col-lg-10 col-sm-12">
                        @Html.LabelFor(model => model.Details,new { @class = "col-md-2 col-sm-1 control-label" })
                        <div class="">
                            @Html.TextAreaFor(model => model.Details,new { @class = "form-control" })
                        </div>
                    </div>
                </div>
                <div class="panel-footer">
                    <div class="">
                        <button type="submit" class="btn btn-success">Save</button>&nbsp;&nbsp;
                        @Html.ActionLink("Back","Index")
                    </div>
                </div>
            </div>
}

Shared文件夹中的PartialView：

@model PM_Portal2020.Models.tblOdcItem

<tr @Html.Id("tablerow" + Model.ID)>
    <td>
        <div class="editor-field">
            @Html.TextBoxFor(model => model.Quantity,new { @class = "text-box single-line",name = "Quantity[" + Model.ID + "]",type = "text",value = "",required = "required" })
        </div>
    </td>
    <td>
        <div class="editor-field">
            @Html.TextBoxFor(model => model.Description,name = "Description[" + Model.ID + "]",required = "required",id = "itemDesc" })
        </div>
    </td>
    <td>
        <div class="editor-field">
            @Html.TextBoxFor(model => model.EstimatedCost,name = "EstimatedCost[" + Model.ID + "]",required = "required" })
        </div>
    </td>
    <td>
        <button type="button" class="btn btn-primary" onclick="removeTr(this);">
            <span class="glyphicon glyphicon-trash"></span>
        </button>
    </td>
</tr>

查看模型

public class NewOdcViewModel
{
    public NewOdcViewModel()
    {
    }

    public IList<tblOdcItem> OdcItems { get; set; }
    public string Details { get; set; }
    public int OdcId { get; set; }
    public tblUser User { get; set; }
}

它提交给控制器，但是odcitems列表始终为count =0。任何帮助都将非常有用。谢谢

解决方法

这是一个JavaScript示例，只需在添加/删除操作中使用此功能即可重新排列名称。

function RearangeName(){
        var i = 0;
        $("#submissionTable>tbody>tr").each(function () {
            $(this).find("input").each(function () {
                if ($(this).prop("name").indexOf('Quantity') > 0) {
                    $(this).attr('name',"OdcItems[" + i + "].Quantity");
                }
                if ($(this).prop("name").indexOf('Description') > 0) {
                    $(this).attr('name',"OdcItems[" + i + "].Description");
                }
                if ($(this).prop("name").indexOf('EstimatedCost') > 0) {
                    $(this).attr('name',"OdcItems[" + i + "].EstimatedCost");
                }
            });
            i++;
        });
    }

,

该名称应与模型属性匹配，因此在部分视图中，您将名称设置为 OdcItems [0] .Quantity ，而不是Quantity [“ + Model.ID +”]。>

@Html.TextBoxFor(model => model.Quantity,new { @class = "text-box single-line",name = "OdcItems[0].Quantity",type = "text",value = "",required = "required" })

例如 OdcItems [0]。数量

OdcItems [1]。数量

OdcItems [2]。数量

....

OdcItems [n]。数量