FormExtensions Class

Artículo
02/21/2011

Represents support for HTML in an application.

Inheritance Hierarchy

System.Object
System.Web.Mvc.Html.FormExtensions

Namespace: System.Web.Mvc.Html
Assembly: System.Web.Mvc (in System.Web.Mvc.dll)

Syntax

'Declaration
<ExtensionAttribute> _
Public NotInheritable Class FormExtensions

public static class FormExtensions

[ExtensionAttribute]
public ref class FormExtensions abstract sealed

The FormExtensions type exposes the following members.

Methods

	Name	Description
	BeginForm(HtmlHelper)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, RouteValueDictionary)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, FormMethod)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, RouteValueDictionary)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, Object, FormMethod)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, FormMethod, IDictionary<String, Object>)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, FormMethod, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, RouteValueDictionary, FormMethod)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, Object, FormMethod, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginForm(HtmlHelper, String, String, RouteValueDictionary, FormMethod, IDictionary<String, Object>)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by an action method.
	BeginRouteForm(HtmlHelper, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, RouteValueDictionary)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, FormMethod)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, RouteValueDictionary)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, Object, FormMethod)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, FormMethod, IDictionary<String, Object>)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, FormMethod, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, RouteValueDictionary, FormMethod)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, Object, FormMethod, Object)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	BeginRouteForm(HtmlHelper, String, RouteValueDictionary, FormMethod, IDictionary<String, Object>)	Writes an opening <form> tag to the response. When the user submits the form, the request will be processed by the route target.
	EndForm	Renders the closing </form> tag to the response.

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Remarks

The FormExtensions class contains methods that extend the HtmlHelper class. Each extension method renders an HTML form element. The BeginForm method renders a form that will be handled by a controller action method. The BeginRouteForm method renders a form that will be handled by the URL that is identified by specified route parameters. The EndForm method renders the closing element for a form.

Examples

This example shows two ways to create the same form in ASP.NET MVC. The first way uses the Using statement. The second way uses the MvcForm class directly.

<%  Using (Html.BeginForm("ProcessForm", "Home"))%>

   Enter your name: <%= Html.TextBox("name") %>
   <input type="submit" value="Submit" />

<% End Using%>

<br /><br />

<% Dim form As Html.MvcForm = Html.BeginForm("ProcessForm", "Home")%>

       Enter your name: <%= Html.TextBox("name") %>
       <input type="submit" value="Submit" />

<% form.EndForm()%>

<% using (Html.BeginForm("ProcessForm", "Home"))
   { %>

   Enter your name: <%= Html.TextBox("name") %>
   <input type="submit" value="Submit" />

<% } %>

<br /><br />

<% MvcForm form = Html.BeginForm("ProcessForm", "Home"); %>

       Enter your name: <%= Html.TextBox("name") %>
       <input type="submit" value="Submit" />

<% form.EndForm(); %>

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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