[英]Update HTML.HiddenFor value with selected value form Dropdownlist
我有一种简单的销售信息形式,用户可以编辑评论和原因,然后使用SaveChanges()函数将数据提交回数据库。 我需要更新一个包含ID号的字段。 我有一个简单的下拉列表(由viewbag填充),当用户进行更改时,我想更新hiddenfor字段中的ID号,以便可以将其发布回保存。 我的代码如下:
编辑器模板
<tr>
@Html.HiddenFor(modelItem => modelItem.ID)
@Html.HiddenFor(modelItem => modelItem.tblTaggingGroupID)
@Html.HiddenFor(modelItem => modelItem.FinYear)
@Html.HiddenFor(modelItem => modelItem.FinWeek)
@Html.HiddenFor(modelItem => modelItem.WeekDay)
@Html.HiddenFor(modelItem => modelItem.Segment)
@Html.HiddenFor(modelItem => modelItem.NetSales)
@Html.HiddenFor(modelItem => modelItem.SwellSales)
@Html.HiddenFor(modelItem => modelItem.SpikeSales)
@Html.HiddenFor(modelItem => modelItem.BaseSales)
@Html.HiddenFor(modelItem => modelItem.tblTaggingReasonID)
<td>
@switch (Model.WeekDay)
{
case 1:
@:Sunday
break;
case 2:
@:Monday
break;
case 3:
@:Tuesday
break;
case 4:
@:Wednesday
break;
case 5:
@:Thursday
break;
case 6:
@:Friday
break;
case 7:
@:Saturday
break;
default:
break;
}
</td>
<td>
@Html.DisplayFor(modelItem => modelItem.Segment)
</td>
<td>
@Html.DisplayFor(modelItem => modelItem.NetSales)
</td>
<td>
@Html.DisplayFor(modelItem => modelItem.SwellSales)
</td>
<td>
@Html.DisplayFor(modelItem => modelItem.SpikeSales)
</td>
<td>
@switch (Model.Recurring)
{
case true:
Model.Recurring.ToString();
break;
case false:
Model.Recurring.ToString();
break;
default:
break;
}
@Html.EditorFor(modelItem => modelItem.Recurring)
</td>
<td>@Html.DropDownListFor(modelItem => modelItem.tblTaggingReasonID, (SelectList)ViewBag.Reasons, "Please Select")</td>
<td>
@Html.EditorFor(modelItem => modelItem.Comment, new { @class = "Commenttxt" })
</td>
控制器:
public ActionResult Index()
{
var SelectedID = Convert.ToInt32(Session["_SessionSelectGroupID"]);
var SelectedYear = Convert.ToInt32(Session["_SessionSelectFinYear"]);
var SelectedWeek = Convert.ToInt32(Session["_SessionSelectFinWeek"]);
var tblTaggingGroupInstances = db.tblTaggingGroupInstances.Include(t => t.tblTaggingGroup);
ViewBag.Reasons = new SelectList(db.tblTaggingReasons,"ID","UpliftReason");
return View(tblTaggingGroupInstances.Where(t => t.tblTaggingGroupID == SelectedID && t.FinYear == SelectedYear && t.FinWeek == SelectedWeek).ToList());
}
[HttpPost]
public ActionResult Index(List<tblTaggingGroupInstance> model)
{
foreach (var record in model)
{
db.Entry(record).State = EntityState.Modified;
}
db.SaveChanges();
return RedirectToAction("Details");
}
我以为可以用一些简单的JQuery或Javascript完成此操作,但是到目前为止,我尝试过的一切都失败了吗?
无需使用javascript更新隐藏的输入。 而是直接绑定到属性
@Html.DropDownList(m => m.tblTaggingReasonID, (SelectList)ViewBag.Reasons, "Please Select")
并从视图中删除隐藏的输入。
将change()
事件附加到#Reasons
并更新#tblTaggingReasonID
值。 如图所示 :-
$("#Reasons").on("change",function(){
$("#tblTaggingReasonID").val(this.value)
});
不要忘记在页面中包含jQuery文件。
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