public static async Task <string> RenderView(string path, ViewDataDictionary viewDataDictionary)
{
if (ServiceProvider == null)
{
throw new InvalidOperationException($"In order to use the facade, {nameof(UseMailTemplates)} must be called in Startup.Configure method. ");
}
path = path ?? throw new ArgumentNullException(nameof(path));
viewDataDictionary = viewDataDictionary ?? throw new ArgumentNullException(nameof(viewDataDictionary));
path = path.EndsWith(".cshtml") ? path : $"{path}.cshtml";
path = path.Trim('/');
using (IServiceScope scope = ServiceProvider.CreateScope())
{
MailOptions options = scope.ServiceProvider.GetRequiredService <IOptions <MailOptions> >().Value;
ICompositeViewEngine viewEngine = scope.ServiceProvider.GetRequiredService <ICompositeViewEngine>();
ITempDataProvider tempDataProvider = scope.ServiceProvider.GetRequiredService <ITempDataProvider>();
IHttpContextAccessor httpContextAccessor = scope.ServiceProvider.GetRequiredService <IHttpContextAccessor>();
HttpContext httpContext = httpContextAccessor.HttpContext;
if (httpContext == null)
{
httpContext = new DefaultHttpContext
{
RequestServices = scope.ServiceProvider
};
}
ActionContext actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
viewDataDictionary.Model = null;
using (StringWriter sw = new StringWriter())
{
ViewEngineResult viewResult = viewEngine.GetView($"{options.ViewTemplateBasePath}/{path}", $"{options.ViewTemplateBasePath}/{path}", true);
if (viewResult?.View == null)
{
throw new Exception($"View {options.ViewTemplateBasePath}/{path} not found.");
}
ViewContext viewContext = new ViewContext(actionContext, viewResult.View, viewDataDictionary, new TempDataDictionary(httpContext, tempDataProvider), sw, new HtmlHelperOptions());
await viewResult.View.RenderAsync(viewContext);
sw.Flush();
if (viewContext.ViewData != viewDataDictionary)
{
var keys = viewContext.ViewData.Keys.ToArray();
foreach (var key in keys)
{
viewDataDictionary[key] = viewContext.ViewData[key];
}
}
return(sw.ToString());
}
}
}
public EmailSender(IOptions <MailOptions> options)
{
Options = options.Value;
}