获取根目录的URL例如http://localhost:51898

publicstaticstringGetRootURI()
{
stringAppPath="";
HttpContextHttpCurrent=HttpContext.Current;
HttpRequestReq;
if(HttpCurrent!=null)
{
Req=HttpCurrent.Request;

stringUrlAuthority=Req.Url.GetLeftPart(UriPartial.Authority);
if(Req.ApplicationPath==null||Req.ApplicationPath=="/")
//直接安装在Web站点
AppPath=UrlAuthority;
else
//安装在虚拟子目录下
AppPath=UrlAuthority+Req.ApplicationPath;
}
returnAppPath;
}