Passing and using parameters

[Tor Inge Rislaa]

Passing and using parameters



How to get hold of the parameter value provided by the URL? When I open a
web form with a DataSource I often include a parameter in the URL as below:



myNewPage.aspx?myParam = 10



If I simply need to use the value of myParam in the VB code when the new
page load, how do I refer to the parameter?



e.g. myLabel.Text = myParam (where myParam is replaced with a proper way to
refer to it)



TIRislaa

 

[Mark Fitzpatrick]

It comes from the Request.QueryString collection. I forget the VB code, but
in C# it's:

Request.QueryString["myParam"].ToString()

Keep in mind, before you ever attempt to reference it, you'll need to make
sure that it is not a null value. If you don't test for null first, and the
querystring variable isn't present (it could be there but misspelled for
example) then it will through a null reference error when you attempt to use
the ToString() method on it. Always test for null first just in case.

in C# the test woud be:

if(Request.QueryString["myParam"] != null)


--

Hope this helps,
Mark Fitzpatrick
Former Microsoft FrontPage MVP 199?-2006

 

[John Timney \(MVP\)]

myLabel.Text = Request.QueryString("myParam")

or

Request.QueryString.GetValues("myParam")[1] if you have more than one named
myParam value

--
Regards

John Timney (MVP)
VISIT MY WEBSITE:
http://www.johntimney.com
http://www.johntimney.com/blog

 

[Tor Inge Rislaa]

Solved my problem.
Thank you very much!

TIRislaa

It comes from the Request.QueryString collection. I forget the VB code,
but in C# it's:

Request.QueryString["myParam"].ToString()

Keep in mind, before you ever attempt to reference it, you'll need to make
sure that it is not a null value. If you don't test for null first, and
the querystring variable isn't present (it could be there but misspelled
for example) then it will through a null reference error when you attempt
to use the ToString() method on it. Always test for null first just in
case.

in C# the test woud be:

if(Request.QueryString["myParam"] != null)


--

Hope this helps,
Mark Fitzpatrick
Former Microsoft FrontPage MVP 199?-2006


--

Hope this helps,
Mark Fitzpatrick
Former Microsoft FrontPage MVP 199?-2006

Passing and using parameters



How to get hold of the parameter value provided by the URL? When I open a
web form with a DataSource I often include a parameter in the URL as
below:



myNewPage.aspx?myParam = 10



If I simply need to use the value of myParam in the VB code when the new
page load, how do I refer to the parameter?



e.g. myLabel.Text = myParam (where myParam is replaced with a proper way
to refer to it)



TIRislaa