廣度與深度

System.Web.HttpContext.Current.Server.MapPath()
傳入虛擬路徑 (網址URL，正斜線，例如 https://localhost/)
傳回實體路徑 (檔案總管，反斜線，例如 C:\inetpub\wwwroot )

//Current = C:\OBPV2\OBPV2 Portal\QA\Portal_Web_SSO\Tool\
//Target  = C:\OBPV2\OBPV2 Portal\QA\Portal_Web_SSO\LogFiles\SAP Result.txt

//根目錄  C:\inetpub\wwwroot\
string sPath_Root = System.Web.HttpContext.Current.Server.MapPath("/");

//應用程式目錄  C:\\OBPV2\OBPV2 Portal\QA\Portal_Web_SSO\
string sPath_App = System.Web.HttpContext.Current.Server.MapPath("~/");

//上一層目錄  C:\OBPV2\OBPV2 Portal\QA\Portal_Web_SSO\
string sPath_ParentFolder = System.Web.HttpContext.Current.Server.MapPath("../");

//當前目錄  C:\OBPV2\OBPV2 Portal\QA\Portal_Web_SSO\Tool\
string sPath_CurrntFolder = System.Web.HttpContext.Current.Server.MapPath("./");

string sPath_SubFolder = @"LogFiles\";
string sFileName = "SAP Result.txt";
string sPath = sPath_App + sPath_SubFolder + sFileName;