private IViewComponentHelper GetViewComponentHelper(MyViewComponentContext context, StringWriter sw)
{
var viewContext = new ViewContext(context.ActionContext, NullView.Instance, context.ViewData, context.TempData, sw, new HtmlHelperOptions());
var helper = context.HttpContext.RequestServices.GetRequiredService <IViewComponentHelper>();
(helper as IViewContextAware)?.Contextualize(viewContext);
return(helper);
}
private async Task <string> Render(MyViewComponentContext myViewComponentContext, string viewComponentName, object args)
{
using (var writer = new StringWriter())
{
var helper = this.GetViewComponentHelper(myViewComponentContext, writer);
var result = await helper.InvokeAsync(viewComponentName, args);
result.WriteTo(writer, HtmlEncoder.Default);
await writer.FlushAsync();
return(writer.ToString());
}
}
public Task <string> RenderToStringAsync(string viewName, object model)
{
var httpContext = this._httpContextAccessor.HttpContext;
var actionContext = new ActionContext(httpContext, httpContext.GetRouteData(), _actionContext.ActionContext.ActionDescriptor);
var context = new MyViewComponentContext {
HttpContext = httpContext,
ActionContext = actionContext,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary())
{
Model = model
},
TempData = new TempDataDictionary(
httpContext,
_tempDataProvider
),
};
return(this.Render(context, viewName, model));
}