protected virtual async Task RenderPartialCoreAsync([NotNull] string partialViewName,
object model,
ViewDataDictionary viewData,
TextWriter writer)
{
// Determine which ViewData we should use to construct a new ViewData
var baseViewData = viewData ?? ViewData;
var newViewData = new ViewDataDictionary(baseViewData, model);
var viewEngineResult = _viewEngine.FindPartialView(ViewContext, partialViewName);
if (!viewEngineResult.Success)
{
var locations = string.Empty;
if (viewEngineResult.SearchedLocations != null)
{
locations = Environment.NewLine +
string.Join(Environment.NewLine, viewEngineResult.SearchedLocations);
}
throw new InvalidOperationException(
Resources.FormatViewEngine_PartialViewNotFound(partialViewName, locations));
}
var view = viewEngineResult.View;
using (view as IDisposable)
{
var viewContext = new ViewContext(ViewContext, view, newViewData, writer);
await viewEngineResult.View.RenderAsync(viewContext);
}
}
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
output.TagName = null;
var partialResult = _viewEngine.FindPartialView(ViewContext, Name);
if (partialResult != null && partialResult.Success)
{
var partialViewData = new ViewDataDictionary(ViewContext.ViewData, Model);
var partialWriter = new TagHelperContentWrapperTextWriter(ViewContext.Writer.Encoding, output.Content);
var partialViewContext = new ViewContext(ViewContext, partialResult.View, partialViewData, partialWriter);
await partialResult.View.RenderAsync(partialViewContext);
}
}