Handling onchange event in HTML.DropDownList Razor MVC - asp.net-mvc

Question

I'm handling an onchange event with a selected value by simple HTML like this:
<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:
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 onchange with #Html.DropDownList()

Answer 1

Description
You can use another overload of the DropDownList method. Pick the one you need and pass in
a object with your html attributes.
Sample
#Html.DropDownList("CategoryID", null, new { #onchange="location = this.value;" })
More Information
MSDN - SelectExtensions.DropDownList Method

Answer 2

The way of dknaack does not work for me, I found this solution as well:
#Html.DropDownList("Chapters", ViewBag.Chapters as SelectList,
"Select chapter", new { #onchange = "location = this.value;" })
where
#Html.DropDownList(controlName, ViewBag.property + cast, "Default value", #onchange event)
In the controller you can add:
DbModel db = new DbModel(); //entity model of Entity Framework
ViewBag.Chapters = new SelectList(db.T_Chapter, "Id", "Name");