正则 截取URL 网址字符

 Regex reg = new Regex(@"(?imn)(?<do>http://[^/]+/)(?<dir>([^/]+/)*([^/.]*$)?)((?<page>[^?.]+\.[^?]+)\?)?(?<par>.*$)");
                   var filename =string.Empty;
                   var fileurl = string.Empty;

plate.WalkThroughUrl ="http://47.104.9.158/upload/Report/Temp/202204/20220407142558029.xls";

                     //正则过滤全路径前面的地址 保留短路径
                    MatchCollection mc = reg.Matches(plate.WalkThroughUrl);
                    foreach (Match m in mc)
                    {
                        fileurl = m.Groups["dir"].Value;//upload/ReportTemp/202203/
                        filename = m.Groups["par"].Value; //20220330172440919.xls
                    }
                    plate.WalkThroughUrl ="/"+ fileurl + filename;

来源 https://blog.csdn.net/weixin_33913332/article/details/86038571   地址 

C#正则截取URL网址字符串