Action and RenderAction are similar to the Partial and RenderPartial helpers. The Partial helper typically helps a view render a portion of a view’s model using view markup in a separate file. Action, on the other hand, executes a separate controller action and displays the results. Action offers more fl… Continue reading
The Partial helper renders a partial view into a string. Typically, a partial view contains reusable markup you want to render from inside multiple different views. Partial has four overloads: public void Partial(string partialViewName); public void Partial(string partialViewName, object model); public void Partial(string partialViewName, ViewDataDictionary viewData); public void Partial(string partialViewName,… Continue reading
The ActionLink method renders a hyperlink (anchor tag) to another controller action. Like the BeginForm helper you looked at earlier, the ActionLink helper uses the routing API under the hood to generate the URL. For example, when linking to an action in the same controller used to render the current… Continue reading
The CheckBox helper is unique because it renders two input elements. Take the following code, for example: @Html.CheckBox(“IsDiscounted”) This code produces the following HTML: <input id=”IsDiscounted” name=”IsDiscounted” type=”checkbox” value=”true” /> <input name=”IsDiscounted” type=”hidden” value=”false” /> You are probably wondering why the helper renders a hidden input in addition to the… Continue reading
Radio buttons are generally grouped together to provide a range of possible options for a single value. For example, if you want the user to select a color from a specific list of colors, you can use multiple radio buttons to present the choices. To group the radio buttons, you… Continue reading
The Html.Password helper renders a password field. It’s much like the TextBox helper, except that it does not retain the posted value, and it uses a password mask. The following code: @Html.Password(“UserPassword”) results in: <input id=”UserPassword” name=”UserPassword” type=”password” value=”” /> The strongly typed syntax for Html.Password, as you’d expect, is… Continue reading
The Html.Hidden helper renders a hidden input. For example, the following code: @Html.Hidden(“wizardStep”, “1”) results in: <input id=”wizardStep” name=”wizardStep” type=”hidden” value=”1″ /> The strongly typed version of this helper is Html.HiddenFor. Assuming your model had a WizardStep property, you would use it as follows: @Html.HiddenFor(m => m.WizardStep)
The templated helpers in ASP.NET MVC build HTML using metadata and a template. The metadata includes information about a model value (its name and type), as well as model metadata (added through data annotations or a custom provider). The templated helpers are Html.Display and Html.Editor, their strongly typed counterparts, Html.DisplayFor… Continue reading
When there is an error for a particular field in the ModelState dictionary, you can use the ValidationMessage helper to display that message. For example, in the following controller action, you purposely add an error to model state for the Title property: [HttpPost] public ActionResult Edit(int id, FormCollection collection) {… Continue reading
Both the DropDownList and ListBox helpers return a <select /> element. DropDownList allows single item selection, whereas ListBox allows for multiple item selection (by setting the multiple attribute to multiple in the rendered markup). Typically, a select element serves two purposes: To show a list of possible options To show… Continue reading