我有一个下载列表
{
Select a title,
Mr,
Ms,
Mrs
}
像这样初始化
//in model file
Mymodel mm=new Mymodel();
mm.Titles=new []
{
new SelectListItem{....}
}
.....
//in view file and was set up inside a form
@Html.DropDownListFor(m=>m.Title, Model.Titles,"Select a title");
点击提交按钮后,我想在下拉列表中获得所选值。
答案 0 :(得分:2)
您可以将提交表单的[HttpPost]
控制器操作采用与参数相同的视图模型:
[HttpPost]
public ActionResult SomeAction(Mymodel model)
{
// the model.Title property will contain the selected value here
}
此外,Titles
集合也不会发送到您的HttpPost操作。这就是HTML的工作原理。提交表单时,仅发送<select>
元素的选定值。因此,如果您打算重新显示相同的视图,则需要重新填充Titles
属性。
例如:
[HttpPost]
public ActionResult SomeAction(Mymodel model)
{
if (!ModelState.IsValid)
{
// there was a validation error, for example the user didn't select any title
// and the Title property was decorated with the [Required] attribute =>
// repopulate the Titles property and show the view
model.Titles = .... same thing you did in your GET action
return View(model);
}
// at this stage the model is valid => you could use the model.Title
// property to do some processing and redirect
return RedirectToAction("Success");
}