How to get user specific exception details in case of multi user system?

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Suppose in an application at a time multiple users are online. And because of some reason 4 users got exceptions. As we have global exception handling implemented in our Global.asax file, so we show a custom error page to all the user and log the error using below code:

C#

var currentException = Server.GetLastError();
logger.LogDetails(currentException); // some logging code
Server.ClearError();

User 1 got Divide by zero exception.
User 2 got invalid cast exception.
User 3 got Index out of range exception.
User 4 got some Sqlexception.

What will this Server.GetLastError() return in this case?

Also, I need to log the exceptions. So think of it as, I want to log exception based on user as key and Exception details as description. So for User 1, there will be a log entry something like User=U1, ExceptionDescription="Divide By zero".

I can get current user using HTTPContext but still not able to get exception that is occurred in their session. How can I achieve this?

What I have tried:

It seems "Server" is not specific to a user. So if we try to read GetLastError from this it'll return whatever the last exception occurred.

Posted 5-Dec-16 8:40am

sunil kumar meena

Updated 6-Dec-16 8:16am

v4

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sunil kumar meena · Accepted Answer · 2016-12-06T07:38:00

C#

GetLastError: is thread safe. It retrieves the calling thread's last-error code value. The last-error code is maintained on a per-thread basis. Multiple threads do not overwrite each other's last-error code.

C#

var currentException = Server.GetLastError();
var user = HttpContext.Current.User;
logger.LogDetails(currentException, user); // some logging code
Server.ClearError();