/// <summary>
/// Executes the <see cref="IView"/> asynchronously.
/// </summary>
/// <param name="actionContext">The <see cref="ActionContext"/> associated with the current request.</param>
/// <param name="view">The <see cref="IView"/>.</param>
/// <param name="viewResult">The <see cref="ViewResult"/>.</param>
/// <returns>A <see cref="Task"/> which will complete when view execution is completed.</returns>
public async Task ExecuteAsync(ActionContext actionContext, IView view, PdfResult viewResult)
{
if (actionContext == null)
{
throw new ArgumentNullException(nameof(actionContext));
}
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
if (viewResult == null)
{
throw new ArgumentNullException(nameof(viewResult));
}
var response = actionContext.HttpContext.Response;
response.Headers.Add("Content-Disposition", viewResult.ContentDisposition);
string resolvedContentType = null;
Encoding resolvedContentTypeEncoding = null;
ResponseContentTypeHelper.ResolveContentTypeAndEncoding(viewResult.ContentType, viewResult.ContentType, DefaultContentType, out resolvedContentType, out resolvedContentTypeEncoding);
response.ContentType = resolvedContentType;
response.StatusCode = viewResult.StatusCode;
var razorStream = new MemoryStream();
using (var writer = new StreamWriter(razorStream))
{
var viewContext = new ViewContext(
actionContext,
view,
viewResult.ViewData,
viewResult.TempData,
writer,
ViewOptions.HtmlHelperOptions);
await view.RenderAsync(viewContext);
await writer.FlushAsync();
Document document = new Document(viewResult.PageSize);
// step 2
var pdfWriter = PdfWriter.GetInstance(document, response.Body);
razorStream.Position = 0;
using (var tr = new StreamReader(razorStream))
{
// step 3
document.Open();
XMLWorkerHelper.GetInstance().ParseXHtml(pdfWriter, document, tr);
document.Close();
}
}
}
/// <summary>
/// Attempts to find the <see cref="IView"/> associated with <paramref name="viewResult"/>.
/// </summary>
/// <param name="actionContext">The <see cref="ActionContext"/> associated with the current request.</param>
/// <param name="viewResult">The <see cref="ViewResult"/>.</param>
/// <returns>A <see cref="ViewEngineResult"/>.</returns>
public virtual ViewEngineResult FindView(ActionContext actionContext, PdfResult viewResult)
{
if (actionContext == null)
{
throw new ArgumentNullException(nameof(actionContext));
}
if (viewResult == null)
{
throw new ArgumentNullException(nameof(viewResult));
}
var viewEngine = viewResult.ViewEngine ?? ViewEngine;
var viewName = viewResult.ViewName ?? GetActionName(actionContext);
var result = viewEngine.GetView(executingFilePath: null, viewPath: viewName, isMainPage: false);
var originalResult = result;
if (!result.Success)
{
result = viewEngine.FindView(actionContext, viewName, isMainPage: false);
}
if (!result.Success)
{
if (originalResult.SearchedLocations.Any())
{
if (result.SearchedLocations.Any())
{
// Return a new ViewEngineResult listing all searched locations.
var locations = new List <string>(originalResult.SearchedLocations);
locations.AddRange(result.SearchedLocations);
result = ViewEngineResult.NotFound(viewName, locations);
}
else
{
// GetView() searched locations but FindView() did not. Use first ViewEngineResult.
result = originalResult;
}
}
}
if (result.Success)
{
if (DiagnosticSource.IsEnabled("Microsoft.AspNetCore.Mvc.ViewFound"))
{
DiagnosticSource.Write(
"Microsoft.AspNetCore.Mvc.ViewFound",
new
{
actionContext = actionContext,
isMainPage = false,
result = viewResult,
viewName = viewName,
view = result.View,
});
}
}
else
{
if (DiagnosticSource.IsEnabled("Microsoft.AspNetCore.Mvc.ViewNotFound"))
{
DiagnosticSource.Write(
"Microsoft.AspNetCore.Mvc.ViewNotFound",
new
{
actionContext = actionContext,
isMainPage = false,
result = viewResult,
viewName = viewName,
searchedLocations = result.SearchedLocations
});
}
}
return(result);
}
