private IHtmlString PerformInvoke(DisplayContext displayContext, MethodInfo methodInfo, object serviceInstance)
{
var output = new HtmlStringWriter();
var arguments = methodInfo.GetParameters()
.Select(parameter => BindParameter(displayContext, parameter, output));
var returnValue = methodInfo.Invoke(serviceInstance, arguments.ToArray());
if (methodInfo.ReturnType != typeof(void))
{
output.Write(CoerceHtmlString(returnValue));
}
return output;
}
/// <summary>
/// 使用指定的控制器上下文来查找指定的视图。
/// </summary>
/// <returns>
/// 页视图。
/// </returns>
/// <param name="controllerContext">控制器上下文。</param><param name="viewName">视图的名称。</param><param name="masterName">母版的名称。</param><param name="useCache">若指定视图引擎返回缓存的视图（如果存在缓存的视图），则为 true；否则为 false。</param>
public ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
{
var viewResult = _themeAwareViewEngine.FindPartialView(controllerContext, viewName, useCache, true);
if (viewResult.View == null)
{
return viewResult;
}
if (!ThemeFilter.IsApplied(controllerContext.RequestContext))
{
return viewResult;
}
var layoutView = new LayoutView((viewContext, writer, viewDataContainer) =>
{
Logger.Information("准备呈现布局视图");
var childContentWriter = new HtmlStringWriter();
var childContentViewContext = new ViewContext(
viewContext,
viewContext.View,
viewContext.ViewData,
viewContext.TempData,
childContentWriter);
viewResult.View.Render(childContentViewContext, childContentWriter);
_workContext.Layout.Metadata.ChildContent = childContentWriter;
var display = _displayHelperFactory.CreateHelper(viewContext, viewDataContainer);
IHtmlString result = display(_workContext.Layout);
writer.Write(result.ToHtmlString());
Logger.Information("完成布局视图的呈现");
}, (context, view) => viewResult.ViewEngine.ReleaseView(context, viewResult.View));
return new ViewEngineResult(layoutView, this);
}