Difference - Ways to get current logged in user

Question

Hi all... My question is - What is the difference between - 1. Page.User.Identity.Name Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable{mso-style-name:Table Normal;mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-parent:;mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin-top:0in;mso-para-margin-right:0in;mso-para-margin-bottom:8.0pt;mso-para-margin-left:0in;line-height:107%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:Calibrisans-serif;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;} 2. HttpContext.Current.User.Identity.Name.ToString(); 3. System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString(); 4.System.Environment.UserName; ----------- Which is the best method to get the current logged in username for all Single Sign On Applications ?? ------------ Which statement is to be used in which scenario ?? ------- Please explain.

Riddhi Valecha · Answer

Hi... I want to know the technical difference between the 4 statements - 1. Page.User.Identity.Name 2. HttpContext.Current.User.Identity.Name.ToString(); 3. System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString(); 4.System.Environment.UserName; -- Also... in which situations to use which statements...... PLease give some links or explanation... if possible... PLease Help !

burak seyhan · Answer

Again hi Check this link https://msdn.microsoft.com/en-us/library/system.web.httpcontext(v=vs.110).aspx I cant say anymore...

Riddhi Valecha · Answer

Hi Burak... I have tried all the things...none is working on live server... All are fine on local system... Please guide...

burak seyhan · Answer

Did you check the which data come back to username System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString();May be you should use HttpContext.Current.User this will be the best for you

Riddhi Valecha · Answer

Hi.. I loaded my website using System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString(); But it is not working. My Logic - String username = System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString(); --- If(username.Lenght > 0) // USername is not null { //Check in database if user exists or not. //If yes redirect to home page. //Else redirect to error page. } ---------- Everytime it is redirecting me to error page.

burak seyhan · Answer

You can find out from msdn easly. Environment is a Console Applicaiton code. Look at this link http://test.c-sharpcorner.com/Blogs/12482/environment-class-in-C-Sharp.aspx . HttpContext and system.Security.Principal works on the server.

Riddhi Valecha · Answer

Hi... Thanks Burak... I also want to know the difference between all these... I am not able to get the concept from msdn.... Also... In which situations we must use which statement ?? Eg -For Single Sign On we cannot use  System.Environment.UserName as this does not work on the server. Can you please explain or give links from where we can get this ?? Thanks a ton...

burak seyhan · Answer

I dont recommended Environment.UserName I really didn't use it. If u develop web programming then use the session state you can use easly number 2 or number 3. On the other hand Iprincipal is a interface  you should implement it.