/// <summary>
/// 获取指定虚拟路径的 HTML 处理程序
/// </summary>
/// <param name="virtualPath">要获取 HTML 处理程序的虚拟路径</param>
/// <returns>HTML 处理程序</returns>
public static IHtmlHandler GetHandler(string virtualPath)
{
var services = WebServiceLocator.GetServices <IHtmlHandlerProvider>(virtualPath);
foreach (var provider in services)
{
var handler = provider.GetHandler(virtualPath);
if (handler != null)
{
return(handler);
}
}
if (!HostingEnvironment.VirtualPathProvider.FileExists(virtualPath))//如果文件不存在，则直接返回 null 。
{
return(null);
}
return
(GetHandlerInternal <IHtmlHandler>(virtualPath + ".ashx") ??
GetHandlerInternal <IHtmlHandler>(GetHandlerPath(virtualPath)) ??
GetHandlerInternal <IHtmlHandler>(VirtualPathHelper.FallbackSearch(virtualPath, "_handler.ashx")));
}
/// <summary>
/// 获取视图处理程序
/// </summary>
/// <param name="virtualPath">视图的虚拟路径</param>
/// <param name="includeDefaultHandler">是否要查找默认视图处理程序</param>
/// <returns>该虚拟路径的视图处理程序</returns>
internal static IViewHandler GetViewHandlerInternal(string virtualPath, bool includeDefaultHandler)
{
var handler = GetHandlerInternal(virtualPath);
if (handler == null && !includeDefaultHandler)
{
handler = GetHandlerInternal(VirtualPathHelper.FallbackSearch(virtualPath, "_handler.ashx"));
}
return(handler ?? new ViewHandler());
}
private string FindMasterView(string directory)
{
string masterPath;
if (MvcEnvironment.Configuration.FallbackDefaultMaster)
{
masterPath = VirtualPathHelper.FallbackSearch(VirtualPathProvider, directory, "_master.html");
}
else
{
masterPath = VirtualPathUtility.Combine(directory, "_master.html");
if (!VirtualPathProvider.FileExists(masterPath))
{
masterPath = null;
}
}
return(masterPath);
}