private static RenderHtmlWriterDirective AddRenderHtmlDirective(WebFormsControlPageCompositionElement placedRendering, Control contentPlaceHolder)
{
var compositionElement = (WebFormsControlPageCompositionElement)placedRendering;
var wrapped = new RenderHtmlWriterDirective(compositionElement);
contentPlaceHolder.Controls.Add(wrapped);
wrapped.Initialize();
return(wrapped);
}
public RenderingFragmentCollection Execute(PageCompositionElement pp)
{
SwitchingHtmlWriter _writer = new SwitchingHtmlWriter();
var isWebFormsInChargeOfPageBase = pp is WebFormsPageCompositionElement;
if (isWebFormsInChargeOfPageBase)
{
var nativePageRendering = (WebFormsPageCompositionElement)pp;
var nativePage = nativePageRendering.GetPage();
nativePage.PreInit += (sender, args) =>
{
var topMostControl = nativePage.GetRootControl();
foreach (var ph in pp.PlaceHolders.Values)
{
var contentPlaceHolder = topMostControl.FindControl(ph.Id);
contentPlaceHolder.Controls.Add(new SubsitutionHtmlWriterDirective(ph));
}
BuildServerSidePage(topMostControl, pp);
};
nativePage.Init += (sender, args) =>
{
};
nativePage.InitComplete += (sender, args) =>
{
if (nativePage.Header == null)
{
throw new Exception(
"Add a <head runat='server'> tag in order to use this master page as a layout.");
}
if (nativePage.Form == null)
{
throw new Exception(
"Add a <form runat='server'> tag in order to use this master page as a layout.");
}
nativePage.Header.Controls.Add(new GlobalSubstitionComponent(GlobalLayoutPlaceHolderIds.Head));
nativePage.Form.Controls.Add(new GlobalSubstitionComponent(GlobalLayoutPlaceHolderIds.Scripts));
nativePage.Form.Controls.Add(new GlobalSubstitionComponent(GlobalLayoutPlaceHolderIds.InternalStateTracking));
};
_writer.BeginWriting(pp);
var originalHandler = HttpContext.Current.Handler;
try
{
HttpContext.Current.Handler = nativePage; // required in order to process postbacks.
// if aspnet thinks that another renderer is in charge of the
// the execution, then 'GET' content is returned only.
HttpContext.Current.Server.Execute(nativePage, _writer, true);
}
finally
{
HttpContext.Current.Handler = originalHandler;
}
_writer.EndWriting();
}
else
{
var nativeRoot = new System.Web.UI.Page();
var body = new HtmlGenericControl("body");
var form = new HtmlGenericControl("form");
var wrapper = new RenderHtmlWriterDirective(new WebFormsControlPageCompositionElement(body)
{
ContentId = SpecialRenderingFragmentContentIds.WebFormsInterop
});
wrapper.Controls.Add(body);
wrapper.Initialize();
body.Controls.Add(form);
nativeRoot.Controls.Add(wrapper);
foreach (var placeholder in pp.PlaceHolders)
{
form.Controls.Add(new ContentPlaceHolder {
ID = placeholder.Value.Id
});
}
BuildServerSidePage(nativeRoot, pp);
HttpContext.Current.Server.Execute(nativeRoot, _writer, true);
}
return(new RenderingFragmentCollection
{
RenderingResults = _writer.output,
});
}
