Question

我在那里有两个ViewBag，我想制作一个通过这种方式，我可以获得一个DropDownList

中显示的客户的2个不同地址

....
var customerAdress = from cl2 in dc.Adresses
                   where cl2.Customer.User.UserEmail == User.Identity.Name
                   select cl2;

var Adresses = new SelectList(customerAdress.ToList(), "AdressID", "AdressLine1 ", null);
var Adresses2 = new SelectList(customerAdress.ToList(), "AdressID", "AdressLine2", null);
....

有我的观点：

....
<tr>
    <td>Address</td>
    <td colspan="3">
        @Html.DropDownList("Adresses", (IEnumerable<SelectListItem>)(ViewBag.Adresses))

    </td>
</tr>
.....

Answer 1

您需要将它们连接起来显示在一个下拉列表中，如：

var addressesList = customerAdress
                    Select(x=> new 
                           { 
                             ID = x.AddressID,
                             AddressLine = x.AddressLine1 + x.AddressLine2
                           });

ViewBag.Adresses = new SelectList(addressesList.ToList() , "AdressID", "AddressLine ", null);

并且不要将DropDownList帮助程序名称设置为与ViewBag密钥相同，它们应该不同以防止意外行为。

在视图中做：

@Html.DropDownList("SelectAddress",ViewBag.Adresses as SelectList,"Select Address")

当您将DropDownList帮助程序的名称设置为与ViewBag键相同时，它将在ViewBag中查找用于填充DropDownList项的键，在这种情况下，您只需指定name与{{ 1}}键：

ViewBag

希望它有所帮助！

Answer 2

我的问题并不清楚，它已经包含了一个解决方案的尝试，可能误导了我所拥有的所有解决方案所以这里我的解决方案我只是在SelectListItem上使用了Group属性

我的控制器

....

    var customerAdress = from cl2 in dc.Adresses
                                     where cl2.Customer.User.UserEmail == User.Identity.Name
                                     where cl2.Commands.FirstOrDefault().DeliveryAdressID==cl2.AdressID
                                     select cl2;

                var addressesList = customerAdress.
                        Select(x => new
                        {
                            ID = x.AdressID,
                            AddressLine = x.AdressLine1


                        });
                var addressesList2 = customerAdress.
                    Select (x => new
                    {
                        ID = x.AdressID,
                        AddressLine = x.AdressLine2


                    }) ;
                var allAdress = new List<SelectListItem>();

                var group1 = new SelectListGroup() { Name = "DeliverableAdress" };

                foreach (var item in addressesList)
                {
                    allAdress.Add(new SelectListItem() { Text = item.AddressLine, Group = group1 });

                }
                foreach (var item in addressesList2)
                {

                    allAdress.Add(new SelectListItem() { Text = item.AddressLine, Group = group1 });
                }

                //var Adresses = new SelectList(addressesList.ToList(), "AdressID", "AddressLine ", null);
                ViewBag.allAdress = allAdress;
  ....

和我的观点

....
<tr>
                        <td>Address</td>
                        <td colspan="3">
                            @Html.DropDownList("allAdress", (IEnumerable<SelectListItem>)ViewBag.allAdress)



                        </td>
                    </tr>
....

但实际上我误解了正确的想法是连接2个地址线，因为它只是一个地址的细节而没有我认为的2个地址

添加2个selectList aspMvc

2 个答案: