/// <summary>
/// Renders the given partial in the context of the given property.
/// Use PartialFor(m => m) to render a partial for the model itself rather than a child property.
/// </summary>
/// <typeparam name="TModel">The form model type</typeparam>
/// <typeparam name="TPartialModel">The type of the model property to use for the partial model</typeparam>
/// <param name="section">The current section</param>
/// <param name="partialModelProperty">The property to use for the partial model</param>
/// <param name="partialViewName">The name of the partial view to render</param>
/// <returns>The HTML for the rendered partial</returns>
public static Task <IHtmlContent> PartialForAsync <TModel, TPartialModel>(this ISection <TModel> section, Expression <Func <TModel, TPartialModel> > partialModelProperty, [AspMvcPartialView] string partialViewName)
{
var formModel = section.Form.HtmlHelper.ViewData.Model;
using (var h = section.Form.HtmlHelper.For(partialModelProperty, bindFieldsToParent: true))
{
using (var f = section.Form.CreatePartialForm(partialModelProperty, h))
{
using (section.CreatePartialSection(f))
{
return(h.PartialAsync(partialViewName, partialModelProperty.Compile().Invoke(formModel), h.ViewData));
}
}
}
}