/// <summary>
/// 将当前相对于服务器根目录的相对Url（如“/Upload/File”）转换为绝对Url网址，如：“http://localhost:6068/Upload/File”
/// </summary>
public static string ToAbsoluteUrl(this 通用扩展.PathString o)
{
if (o.Value.ToLower().StartsWith("http://"))
{
return(o.Value);
}
return("http://" + WebSite变量.Current.Request.ServerVariables["SERVER_NAME"] + ":" + WebSite变量.Current.Request.ServerVariables["Server_Port"] + o);
}
/// <summary>
/// 将指向当前Web站点下的绝对路径转换为相对于当前页的路径，如“../admin/abc.aspx”
/// </summary>
public static string ToRelativePathForPage(this 通用扩展.PathString o)
{
var s = o.Value;
// 根目录虚拟路径
string virtualPath = WebSite变量.Current.Request.ApplicationPath;
// 根目录绝对路径
string pathRooted = HostingEnvironment.MapPath(virtualPath);
// 页面虚拟路径
string pageVirtualPath = WebSite变量.Current.Request.Path;
if (!Path.IsPathRooted(s) || s.IndexOf(pathRooted) == -1)
{
throw new Exception("路径“{0}”不是绝对路径或不位于当前虚拟Web服务器目录内".FormatWith(s));
}
// 转换成相对路径
//(测试发现，pathRooted 在 VS2005 自带的服务器跟在IIS下根目录或者虚拟目录运行似乎不一样,
// 有此地方后面会加"\", 有些则不会, 为保险起见判断一下)
if (pathRooted.Substring(pathRooted.Length - 1, 1) == "\\")
{
s = s.Replace(pathRooted, "/");
}
else
{
s = s.Replace(pathRooted, "");
}
string relativePath = s.Replace("\\", "/");
string[] pageNodes = pageVirtualPath.Split('/');
// 减去最后一个页面和前面一个 "" 值
int pageNodesCount = pageNodes.Length - 2;
for (int i = 0; i < pageNodesCount; i++)
{
relativePath = "/.." + relativePath;
}
if (pageNodesCount > 0)
{
// 如果存在 ".." , 则把最前面的 "/" 去掉
relativePath = relativePath.Substring(1, relativePath.Length - 1);
}
return(relativePath);
}
/// <summary>
/// 将指向当前Web站点下的绝对路径转换为虚拟服务器路径，如：“~/admin/abc.aspx”
/// </summary>
public static ServerPathString ToServerPath(this 通用扩展.PathString o)
{
var s = o.Value;
string pathRooted = HostingEnvironment.MapPath("~/");
if (!Path.IsPathRooted(s) || s.IndexOf(pathRooted) == -1)
{
throw new Exception("路径“{0}”不是绝对路径或不位于当前虚拟Web服务器目录内".FormatWith(s));
}
if (pathRooted.Substring(pathRooted.Length - 1, 1) == "\\")
{
s = s.Replace(pathRooted, "~/");
}
else
{
s = s.Replace(pathRooted, "~");
}
string relativePath = s.Replace("\\", "/");
return(relativePath.AsServerPathString());
}