asp.net-mvc 在 HTML.DropDownList Razor MVC 中处理 onchange 事件
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Handling onchange event in HTML.DropDownList Razor MVC
提问by Milan Mendpara
I'm handling an onchangeevent with a selected value by simple HTML like this:
我正在onchange通过简单的 HTML处理具有选定值的事件，如下所示：
<select onchange="location = this.value;">
<option value="/product/categoryByPage?PageSize=15" selected="selected">15</option>
<option value="/product/categoryByPage?PageSize=30" selected="selected">30</option>
<option value="/product/categoryByPage?PageSize=50" selected="selected">50</option>
</select>
Doing it like this:
这样做：
List<SelectListItem> items = new List<SelectListItem>();
string[] itemArray = {"15","30","50"};
for (int i = 0; i < itemArray.Count(); i++)
{
items.Add(new SelectListItem
{
Text = itemArray[i],
Value = "/product/categoryByPage?pageSize=" + itemArray[i]
});
}
ViewBag.CategoryID = items;
@Html.DropDownList("CategoryID")
How can I handle onchangewith @Html.DropDownList()
我该如何处理onchange与@Html.DropDownList()
回答by dknaack
Description
描述
You can use another overload of the DropDownListmethod. Pick the one you need and pass in
a object with your html attributes.
您可以使用该DropDownList方法的另一个重载。选择您需要的一个并传入一个带有您的 html 属性的对象。
Sample
样本
@Html.DropDownList("CategoryID", null, new { @onchange="location = this.value;" })
More Information
更多信息
回答by pixelfirexy
The way of dknaack does not work for me, I found this solution as well:
dknaack 的方式对我不起作用，我也找到了这个解决方案：
@Html.DropDownList("Chapters", ViewBag.Chapters as SelectList,
"Select chapter", new { @onchange = "location = this.value;" })
where
在哪里
@Html.DropDownList(controlName, ViewBag.property + cast, "Default value", @onchange event)
In the controller you can add:
在控制器中，您可以添加：
DbModel db = new DbModel(); //entity model of Entity Framework
ViewBag.Chapters = new SelectList(db.T_Chapter, "Id", "Name");
