RenderPartialAsync returns System.Threading.Tasks.Task`1[System.Threading.Tasks.VoidTaskResult]

Question

I am using ASP.NET 5 RC1

_MyPartial

@model MyViewModel  <div class="panel panel-primary">     <div class="panel-body">          @using (Html.BeginForm())             {             @Html.AntiForgeryToken()              <div class="form-horizontal">                 @Html.ValidationSummary(true)                 @Html.MyHtmlHelperRow(model => model.ShortDistrictName)                 @Html.MyHtmlHelperRowSaveButton(model => model.Id)             </div>         }     </div> </div> <div>     @Html.ActionLink("Back to List", "Index") </div> 

cshtml View

@model MyViewModel  @{     ViewBag.Title = "Edit"; }  <h2>@ViewBag.Title</h2>   @Html.RenderPartialAsync("_MyPartial", Model)  @section Scripts {     @{ await Html.RenderPartialAsync("_ValidationScriptsPartial"); } } 

the line

@Html.RenderPartialAsync("_MyPartial", Model) 

apart from it rendering in html, renders

 System.Threading.Tasks.Task`1[System.Threading.Tasks.VoidTaskResult] 

text in the html directly below the last content rendered by the partial page.

If I change the partial line reference to non async

@Html.Partial("_MyPartial", Model) 

then I don't get this text line.

Questions:

1. Why do I get the text line in my html

2. How do I get rid of it and still be able to use RenderPartialAsync?

Answer 1

You need to use await to call asynchronous methods. ASP.NET 5 adds the ability to use await in Razor:

@{await Html.RenderPartialAsync("_MyPartial", Model);} 

Answer 2

using the syntax in the accepted answer gave me this error:

Argument 1: cannot convert from 'void' to 'object'

@await Html.RenderPartialAsync("_ProductList", Model)

in RC1 I had to use curly braces and a semicolon:

@{await Html.RenderPartialAsync("_ProductList", Model);} 

RenderPartialAsync writes directly to the response and returns void (technically Task), which the view compiler can't print as a string.