private async Task RenderLayoutAsync(ViewContext context,
StringCollectionTextWriter bodyWriter)
{
// A layout page can specify another layout page. We'll need to continue
// looking for layout pages until they're no longer specified.
var previousPage = RazorPage;
var renderedLayouts = new List <IRazorPage>();
while (!string.IsNullOrEmpty(previousPage.Layout))
{
var layoutPage = GetLayoutPage(context, previousPage.Layout);
// Notify the previous page that any writes that are performed on it are part of sections being written
// in the layout.
previousPage.IsLayoutBeingRendered = true;
layoutPage.PreviousSectionWriters = previousPage.SectionWriters;
layoutPage.RenderBodyDelegate = bodyWriter.CopyTo;
bodyWriter = await RenderPageAsync(layoutPage, context, executeViewStart : false);
renderedLayouts.Add(layoutPage);
previousPage = layoutPage;
}
// Ensure all defined sections were rendered or RenderBody was invoked for page without defined sections.
foreach (var layoutPage in renderedLayouts)
{
layoutPage.EnsureRenderedBodyOrSections();
}
await bodyWriter.CopyToAsync(context.Writer);
}
