Question

请帮忙。

我有3张桌子

PublicationType表包含columnsTypeID，description
Quantities表格包含quantityId，description
Agent Publicationquantities表包含columnsTypeID，quantityId

当用户选择Publication下拉列表时，如何在MVC3中编写jQuery或Json，然后第二个下拉列表是数量

下拉列表将根据所选的Publication下拉列表填充（使用第三个表AgentPublicationQuantity检查）

示例如果用户选择发布id = 9测试发布3，则数量应填充一半，全部，一半和全部供用户选择。）

从目前为止在视图页面上的代码中，我有两个下拉列表：

PublicationType填充出版物
Quantity填充数量列表

我希望数量基于PublicationType下拉列表值填充，因为不同的发布具有不同的可用数量。

这是我的代码

    public ActionResult Create(int agentID)
    {
        // Get data to display create page.
        AgentPublicationOrder publication = new AgentPublicationOrder(); // Declare new instance of Agent Adjustment object.
        AgentViewModel viewModel = new AgentViewModel(agentID, this.User.Identity.Name);    // Create lightweight agent view model.          
        AgentPublicationOrderViewModel publicationviewmodel = new AgentPublicationOrderViewModel(agentID);

        ViewBag.loggedInUserName = viewModel.loggedInUserName;
        ViewBag.fullContactName = viewModel.fullContactName;
        ViewBag.agentID = viewModel.agentID;

           // get data to populate dropdowlist
        using (var db1 = new AgentPublicationTypesDBContext())
        { 

            var agentquantityFromDB = db1.AgentPublicationTypePublicationQuantities.Select(x => x.publicationQuantityId).ToList();

            // dropdownlist pulicationType
            ViewBag.AgentPublicationTypes = db1.AgentPublicationTypes.Where(x => agentquantityFromDB.Contains(x.id) && x.inactiveDate > DateTime.Today || !x.inactiveDate.HasValue).OrderBy(a => a.description).ToList();

              //dropdownlist Quantity
           ViewBag.Quantities = db1.PublicationQuantities.Where(x => agentquantityFromDB.Contains(x.id) || x.inactiveDate == null && x.inactiveDate > DateTime.Today).OrderBy(x => x.id).ToList();
        }
        return View(publication);
    }

这是我的观看页面

<div class="three_column_row">
            <div class="three_column_col">
                <div class="labelCell2">

                    Publication:
                </div>
                <div class="editorCell">
                    @Html.DropDownListFor(model => model.agentPublicationTypeid, new SelectList(@ViewBag.AgentPublicationTypes, "id", "description", (Model.agentPublicationTypeid != 0 ? Model.agentPublicationTypeid : -1)), "--Select One--")
                </div>
            </div>
            <div class="three_column_col">
                <div class="labelCell2">
                   Qty:
                </div>
                <div class="editorCell">
                    @Html.DropDownListFor(model => model.quantityId, new SelectList(@ViewBag.Quantities, "id", "description"), "--Select One--")


                </div>
            </div>


        </div>`

javascript当选择第一个下拉列表时，第二个下拉列表将根据第一个下拉列表值填充

0 个答案: