将Web站点下的绝对路径转换为虚拟路径
很经常使用到的一个功能,但在在网上却一直没有找到相关的解决方法,今天借着项目应用到的机会写了两个将绝对路径转换为虚拟路径封装好的方法<div style="border-right: #cccccc 1px solid; padding-right: 5px; border-top: #cccccc 1px solid; padding-left: 4px; font-size: 13px; padding-bottom: 4px; border-left: #cccccc 1px solid; width: 98%; padding-top: 4px; border-bottom: #cccccc 1px solid; background-color: #eeeeee;">http://www.agoit.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.agoit.com/Images/OutliningIndicators/ExpandedBlockStart.gif将Web站点下的绝对路径转换为相对于指定页面的虚拟路径<span style="display: none;">
<!---->http://www.agoit.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedBlock.gif/**//// <summary>
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif/// 将Web站点下的绝对路径转换为相对于指定页面的虚拟路径
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif/// </summary>
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif/// <param name="page">当前页面指针，一般为this</param>
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif/// <param name="specifiedPath">绝对路径</param>
http://www.agoit.com/Images/OutliningIndicators/ExpandedBlockEnd.gif/// <returns>虚拟路径, 型如: ../../</returns>
http://www.agoit.com/Images/OutliningIndicators/None.gifpublic static string ConvertSpecifiedPathToRelativePathForPage(Page page, string specifiedPath)
http://www.agoit.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif // 根目录虚拟路径
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif string virtualPath = page.Request.ApplicationPath;
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif // 根目录绝对路径
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif string pathRooted = HostingEnvironment.MapPath(virtualPath);
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif // 页面虚拟路径
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif string pageVirtualPath = page.Request.Path;
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif if (!Path.IsPathRooted(specifiedPath) || specifiedPath.IndexOf(pathRooted) == -1)
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif throw new Exception(string.Format("\"http://www.agoit.com/Images/dot.gif{0}\"是虚拟路径而不是绝对路径!", specifiedPath));
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif // 转换成相对路径
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif //(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,
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif // 有此地方后面会加"\", 有些则不会, 为保险起见判断一下)
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif if (pathRooted.Substring(pathRooted.Length - 1, 1) == "\\")
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif specifiedPath = specifiedPath.Replace(pathRooted, "/");
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif else
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif specifiedPath = specifiedPath.Replace(pathRooted, "");
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif string relativePath = specifiedPath.Replace("\\", "/");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif string[] pageNodes = pageVirtualPath.Split('/');
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif // 减去最后一个页面和前面一个 "" 值
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif int pageNodesCount = pageNodes.Length - 2;
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif for (int i = 0; i < pageNodesCount; i++)
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif relativePath = "/.." + relativePath;
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif if (pageNodesCount > 0)
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif // 如果存在 ".." , 则把最前面的 "/" 去掉
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif relativePath = relativePath.Substring(1, relativePath.Length - 1);
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif return relativePath;
http://www.agoit.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
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