Rendering the field name in an EditorTemplate (rendered through EditorFor())

Question

I\'m currently building the Admin back-end for a website in ASP.NET MVC.

In an ASP.NET MVC application, I\'ve started using the \'EditorFor\' helper method like so:<

Answer 1

In our case we had to use Html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName with ExpressionHelper.GetExpressionText

which in razor was used like this:

           // hiddenFor was caching the value of this html input, and the value alone, nothing else on the page!
            Expression<Func<Web.ViewModels.ApiSettingsViewModel, int>> expression = (m => m.OrgApiLoginCredentials[i].OrgApiLoginId); 
        }
        <input type="hidden" value="@Model.OrgApiLoginCredentials[i].OrgApiLoginId" name="@Html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText(expression))" class="data-org-api-login-id"/>

Answer 2

You should be able to pull out the desired ID from the ViewData.TemplateInfo.HtmlFieldPrefix property of the view. Like this:

<%@ Control Language="C#"
      Inherits="System.Web.Mvc.ViewUserControl<System.XML.Linq.XElement>" %>
<textarea id="<%= ViewData.TemplateInfo.HtmlFieldPrefix %>" class="html">
    <%= Model.ToString() %>
</textarea>

To show why this works, here's the place in TemplateHelpers.cs (of MVC2 Preview 1 source) where ViewData is initialized for the Editor template control:

ViewDataDictionary viewData = new ViewDataDictionary(html.ViewDataContainer.ViewData) {
    Model = modelValue,
    TemplateInfo = new TemplateInfo {
        FormattedModelValue = formattedModelValue,
        ModelType = modelType,
        HtmlFieldPrefix = html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(expression),
        IsNullableValueType = (underlyingNullableType != null),
    }
};

In the call above, "expression" is initialized (further up the call stack) with the name of the property being edited.

BTW, @Sperling below caught a detail I originally missed: if you're using (or might use) a non-default HtmlHelper.IdAttributeDotReplacement, then you'll want to replace the dots in the HtmlPrefix property with HtmlHelper.IdAttributeDotReplacement.

Answer 3

Have been using this to generate id(with model prefix). Skip the .Replace() part if you want the name attribute.

<%=Html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(String.Empty).Replace(".", HtmlHelper.IdAttributeDotReplacement) %>