[英]Get the selected drop down list value from a FormCollection in MVC
I have a form posting to an action with MVC. 我有一个表单发布到MVC的一个动作。 I want to pull the selected drop down list item from the FormCollection in the action. 我想从操作中的FormCollection中提取所选的下拉列表项。 How do I do it? 我该怎么做?
My Html form: 我的Html表格:
<% using (Html.BeginForm())
{%>
<select name="Content List">
<% foreach (String name in (ViewData["names"] as IQueryable<String>)) { %>
<option value="<%= name %>"><%= name%></option>
<% } %>
</select>
<p><input type="submit" value="Save" /></p>
<% } %>
My Action: 我的行动:
[HttpPost]
public ActionResult Index(FormCollection collection)
{
//how do I get the selected drop down list value?
String name = collection.AllKeys.Single();
return RedirectToAction("Details", name);
}
Start by giving your select
tag a valid name
. 首先为您的select
标记提供有效name
。 A valid name cannot contain spaces. 有效名称不能包含空格。
<select name="contentList">
and then fetch the selected value from the form parameters collection: 然后从表单参数集合中获取所选值:
var value = collection["contentList"];
Or even better: don't use any collections, use an action parameter which has the same name as the name of your select and leave the default model binder populate it: 甚至更好:不要使用任何集合,使用与您的选择名称同名的操作参数,并保留默认模型绑定器填充它:
[HttpPost]
public ActionResult Index(string contentList)
{
// contentList will contain the selected value
return RedirectToAction("Details", contentList);
}
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