/// <summary>
/// Used when changes are required to render a view as a string, without altering the ControllerContext for the actual request.
/// </summary>
private ExtendedControllerContext CloneControllerContext()
{
ControllerContext copy = new ControllerContext(Request.RequestContext, this);
// ControllerContext property might be null, that's why we don't use that overload.
/*
* We would never want to have partial views rendered outside of the view, i.e. with @Html.Partial(),
* emitting JavaScript code into the actual view, because that's not what would be intended.
*
* This simple overwrite fixes a few scenarios collaterally:
* - JavaScript partials don't try to emit JavaScript, because they are rendered using the ExtendedControllerContext.
* - The same applies to both partial and JavaScript views being rendered by the AjaxTransformAttribute engine.
*
* In addition, the only scenario likely to ever want this to happen would be something like an AJAX call,
* where we'd like to return both the HTML and the JavaScript, but that can already be handled through the existing methods.
*/
ExtendedControllerContext context = new ExtendedControllerContext(copy);
// required for requests to *.cshtml physical files, in order to render the error view.
if (!context.RouteData.Values.ContainsKey(Constants.RouteDataController))
{
context.RouteData.Values.Add(Constants.RouteDataController, Constants.RouteDataControllerNotFound);
context.RouteData.Values.Add(Constants.RouteDataAction, Constants.RouteDataActionNotFound);
}
return context;
}
/// <summary>
/// Gets a view string aftering producing a ControllerContext where it should be rendered.
/// </summary>
private string InternalGetViewString(string viewName, string controller, object model, Func<string, ControllerContext, ViewEngineResult> findView, ExtendedControllerContext context)
{
if (!controller.NullOrEmpty())
{
context.RouteData.Values["controller"] = controller;
}
if (viewName.NullOrEmpty())
{
viewName = context.RouteData.GetActionString();
}
IView view = findView(viewName, context).View;
string result = RenderViewToString(context, view, model);
return result;
}
/// <summary>
/// Renders a view as a string.
/// </summary>
/// <param name="viewName">The view name. </param>
/// <param name="controller">The controller name.</param>
/// <param name="model">The view model.</param>
/// <param name="context">The controller context.</param>
public string ViewString(string viewName, string controller, object model, ExtendedControllerContext context)
{
Func<string, ControllerContext, ViewEngineResult> findView = (name, ctx) => ViewEngines.Engines.FindView(ctx, name, null);
return InternalGetViewString(viewName, controller, model, findView, context);
}