/// <summary>
/// 创建 HtmlContentResult 实例
/// </summary>
/// <param name="provider">负责加载的提供程序</param>
/// <param name="content">加载的内容</param>
/// <param name="virtualPath">内容的虚拟路径</param>
/// <param name="cacheKey">缓存内容所使用的缓存键</param>
public HtmlContentResult(IHtmlContentProvider provider, string content, string virtualPath, string cacheKey)
{
if (provider == null)
{
throw new ArgumentNullException("provider");
}
if (content == null)
{
throw new ArgumentNullException("content");
}
if (virtualPath == null)
{
throw new ArgumentNullException("virtualPath");
}
if (!VirtualPathUtility.IsAppRelative(virtualPath))
{
throw HtmlProviders.VirtualPathFormatError("virtualPath");
}
Provider = provider;
Content = content;
VirtualPath = virtualPath;
CacheKey = cacheKey;
}
/// <summary>
/// 检测是否能加载指定虚拟路径的文档内容
/// </summary>
/// <param name="virtualPath">虚拟路径</param>
/// <returns>是否能加载指定虚拟路径的文档内容</returns>
public bool CanLoadContent(string virtualPath)
{
if (!VirtualPathUtility.IsAppRelative(virtualPath))
{
throw HtmlProviders.VirtualPathFormatError("virtualPath");
}
return(SupportedExtensions.Contains(VirtualPathUtility.GetExtension(virtualPath)));
}
/// <summary>
/// 加载 HTML 文档内容
/// </summary>
/// <param name="virtualPath">虚拟路径</param>
/// <returns></returns>
public HtmlContentResult LoadContent(string virtualPath)
{
if (!VirtualPathUtility.IsAppRelative(virtualPath))
{
throw HtmlProviders.VirtualPathFormatError("virtualPath");
}
var provider = GetProvider(virtualPath);
return(provider.LoadContent(virtualPath));
}
private static Uri CreateDocumentUri(string virtualPath)
{
if (virtualPath == null)
{
throw new ArgumentNullException("virtualPath");
}
if (!VirtualPathUtility.IsAppRelative(virtualPath))
{
throw HtmlProviders.VirtualPathFormatError("virtualPath");
}
return(new Uri(baseUri, VirtualPathUtility.ToAbsolute(virtualPath)));
}
/// <summary>
/// 获取指定虚拟路径的文档内容加载程序
/// </summary>
/// <param name="virtualPath">虚拟路径</param>
/// <returns></returns>
public IHtmlContentProvider GetProvider(string virtualPath)
{
if (!VirtualPathUtility.IsAppRelative(virtualPath))
{
throw HtmlProviders.VirtualPathFormatError("virtualPath");
}
var extensions = VirtualPathUtility.GetExtension(virtualPath);
IHtmlContentProvider provider;
lock ( _sync )
{
if (data.TryGetValue(extensions, out provider))
{
return(provider);
}
else
{
return(null);
}
}
}
