CODEWITHSUNDEEP
c#asp.net
Anjana
Anjana

Reputation: 1453

System.Web.HttpException was unhandled by user code

I have been using 

protected void Application_Error(Object sender, EventArgs e)
{
    HttpException ex = Server.GetLastError() as HttpException;
    Exception ex_T = ex;
    Session["Ex"] = ex;
    Session["Ex_T"] = ex_T;
    Response.Redirect("~/errorPage.aspx" );
}

function for exception handling.

Here when i login to the application " sometime"

an exception occurs which details as

System.Web.HttpException was unhandled by user code
  Message="Session state is not available in this context."
  Source="System.Web"
  ErrorCode=-2147467259
  StackTrace:
       at System.Web.HttpApplication.get_Session()
       at Tools.Global.Application_Error(Object sender, EventArgs e) in C:\Myproject\Tools\Global.asax.cs:line 67
       at System.EventHandler.Invoke(Object sender, EventArgs e)
       at System.Web.HttpApplication.RaiseOnError()
  InnerException:

i cannot track the reason

Can any one help me out

Thanks in advance

Upvotes: 1

Views: 7766

Answers (2)

sajoshi
sajoshi

Reputation: 2763

First check if the Session is not null before accessing the values.

Secondly GetLastError may return an Exception that is not a HttpException. First try see the if the (ex is HttpException) then assign it to another HttpException variable.

Upvotes: 0

Fun Mun Pieng
Fun Mun Pieng

Reputation: 6911

I can see 2 problems here. The first is that the error occurred outside a session or before a session is created. As you can see from the stack trace, the session was not initialized or has been exited. Sessions cannot be started and should not be accessed within Application_Error.

The second problem is that GetLastError may return an Exception that is not a HttpException. In that case, ex gets assigned null. ex_t is also assigned null from ex.

Exception ex = Server.GetLastError();
if (ex != null)
{
    HttpException hex = ex;
    if (hex != null)
        Session["Ex"] = hex; // try to do something else instead of accessing session
}
Session["Ex_T"] = ex; // try to do something else instead of accessing session
Response.Redirect("~/errorPage.aspx" );

Upvotes: 3

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