What does this mean?

[Jason Huang]

Hi,

Would someone explain the following code more details? Why do we use a
Session here?

DataSet NowDS=(DataSet) Session["NowDS"]

Thanks.

Jason

[Carlos J. Quintero [.NET MVP]]

Re: What does this mean?

Where is "Session" declared? If it is a Web app and the code is in a
WebForm, which derives from System.Web.UI.P age, it may refer to the
Page.Session object, that can hold values for the current web visitor...

--

Best regards,

Carlos J. Quintero

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"Jason Huang" <JasonHuang8888 @hotmail.com> escribió en el mensaje
news:uB1Dd$zaFH A.3736@TK2MSFTN GP15.phx.gbl...[color=blue]
> Hi,
>
> Would someone explain the following code more details? Why do we use a
> Session here?
>
> DataSet NowDS=(DataSet) Session["NowDS"]
>
> Thanks.
>
> Jason
>[/color]

[Thiru .Net]

Re: What does this mean?

hi jason,
you might have stored some set of data into session and here you are
retrieving all those values into DataSet....

rgds,
thiru

[Frisky]

Re: What does this mean?

Translated literally from C#:

Declare a DataSet object reference names NowDS.
Set NowDS to the value in the you Session object named "NowDS".

If the named object does not exist in the session, you will get a null back.
Which means if you use the reference without checking it for null you will
get an exception. The DataSet would have to have been placed in the session
by code that executed earlier in the program. Like on another page. A
session is tied to a specific user too, so it would have to be the same user
and instance for the session to be the same.

BTW: It is not a good programming practice to stuff DataSets (especially
large DataSets) in the session.

Hope this helps...

Frisky

"Jason Huang" <JasonHuang8888 @hotmail.com> wrote in message
news:uB1Dd$zaFH A.3736@TK2MSFTN GP15.phx.gbl...[color=blue]
> Hi,
>
> Would someone explain the following code more details? Why do we use a
> Session here?
>
> DataSet NowDS=(DataSet) Session["NowDS"]
>
> Thanks.
>
> Jason
>[/color]