SelectExtensions::DropDownListFor<TModel, TProperty> Method (HtmlHelper<TModel>, Expression<Func<TModel, TProperty>>, IEnumerable<SelectListItem>, String, Object)
Returns an HTML select element for each property in the object that is represented by the specified expression using the specified list items, option label, and HTML attributes.
Namespace: System.Web.Mvc.Html
Assembly: System.Web.Mvc (in System.Web.Mvc.dll)
[ExtensionAttribute] public: generic<typename TModel, typename TProperty> static MvcHtmlString^ DropDownListFor( HtmlHelper<TModel>^ htmlHelper, Expression<Func<TModel, TProperty>^>^ expression, IEnumerable<SelectListItem^>^ selectList, String^ optionLabel, Object^ htmlAttributes )
Type Parameters
- TModel
The type of the model.
- TProperty
The type of the value.
Parameters
- htmlHelper
- Type: System.Web.Mvc::HtmlHelper<TModel>
The HTML helper instance that this method extends.
- expression
- Type: System.Linq.Expressions::Expression<Func<TModel, TProperty>>
An expression that identifies the object that contains the properties to display.
- selectList
- Type: System.Collections.Generic::IEnumerable<SelectListItem>
A collection of SelectListItem objects that are used to populate the drop-down list.
- optionLabel
- Type: System::String
The text for a default empty item. This parameter can be nullptr.
- htmlAttributes
- Type: System::Object
An object that contains the HTML attributes to set for the element.
Return Value
Type: System.Web.Mvc::MvcHtmlStringAn HTML select element for each property in the object that is represented by the expression.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type HtmlHelper<TModel>. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936(v=vs.118).aspx or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.118).aspx.| Exception | Condition |
|---|---|
| ArgumentNullException | The expression parameter is nullptr. |
Show: