来自相对新手的问候。
我正在尝试根据另一个下拉列表(代理商)中的选定值填充下拉列表(收单地址)。在第一个下拉列表中选择值时,从属下拉列表显示[对象对象]。我需要第二个下拉列表中的ID来更新数据库记录。
我相信我在这里错过了真的基本/愚蠢的东西,但我已经放弃了。我在这里搜索过类似的问题,但还没有找到解决我问题的任何内容。
很多,非常感谢提前!
以下是相关的代码段:
CreatePurchaseOrderViewModel.cs
// Agency dropdown list
[Required(ErrorMessage = "An agency must be selected.")]
public int AgencyID { get; set; }
public List<SelectListItem> AgencyList { get; set; }
// Agency bill-to address dropdown list
[Required(ErrorMessage = "A bill-to address must be selected.")]
public int BillToAddressID { get; set; }
public List<SelectListItem> BillToAddressList { get; set; }
PurchaseOrderService.cs
// Query vPurchaseOrderAddresses view to fetch
// a bill-to address for a given Id
public List<SelectListItem> GetBillToAddressByAgency(int Id)
{
using (MyEntities db = new MyEntities())
{
var billtoAddressQuery = db.vPurchaseOrderAddresses.ToList()
.Where(b => b.PartyID == Id)
.Where(b => b.PCMPT == 2) // (2) = bill-to address
.Select(b => new SelectListItem
{
Value = b.PartyID.ToString(),
Text = b.Address
});
// Sort list ascending
billtoAddressQuery = billtoAddressQuery.OrderBy(d => d.Text);
return billtoAddressQuery.ToList();
}
}
PurchaseOrderController.cs
[HttpPost]
public ActionResult GetBillToAddressByAgency(string selectedValue)
{
// Create instance of PurchaseOrderService class
PurchaseOrderService PO = new PurchaseOrderService();
// Create a list to hold bill-to addresses from database
List<SelectListItem> BillToAddressList = new List<SelectListItem>();
// Populate bill-to address dropdown list by calling
// the GetBillToAddressByAgency method of the PurchaseOrderService class.
int i;
if (Int32.TryParse(selectedValue, out i))
{
BillToAddressList = PO.GetBillToAddressByAgency(Convert.ToInt32(selectedValue));
}
return Json(new { billtoAddressList = BillToAddressList });
}
最后,视图: Create.cshtml
@*-- Agency dropdown list --*@
<div class="form-group">
<label class="control-label col-md-2" for="AgencyID">Agency *</label>
<div class="col-md-10">
@Html.DropDownListFor(model => model.AgencyID, Model.AgencyList, "-- Select Agency --")
@Html.ValidationMessageFor(model => model.AgencyID)
</div>
</div>
<div class="form-group">
<label class="control-label col-md-2" for="BillToAddressID">Bill-To Address *</label>
<div class="col-md-10">
@Html.DropDownListFor(model => model.BillToAddressID, Model.BillToAddressList, "-- Select Bill-To Address --")
@Html.ValidationMessageFor(model => model.BillToAddressID)
</div>
</div>
<script type="text/javascript">
$("#AgencyID").change(function () {
var selectedValue = $(this).val();
$.ajax({
url: '@Url.Action("GetBillToAddressByAgency", "PurchaseOrder")',
type: 'POST',
data: { "selectedValue": selectedValue },
dataType: 'json',
success: function (response) {
var items = "";
$.each(response.billtoAddressList, function (i, item) {
items += "<option value=\"" + item + "\">" + item + "</option>";
});
$("#BillToAddressID").html(items);
},
error: function (error) {
}
});
});
</script>
答案 0 :(得分:0)
替换此行items += "<option value=\"" + item + "\">" + item + "</option>";
按items += "<option value=\"" + item.Value + "\">" + item.Text + "</option>";
关于你的代码。因为您可以检索好的对象,但您需要访问属性。 我希望它会对你有所帮助。