ASP.Net passing values between forms

I'm having a problem passing a value between forms in ASP.Net (C# code behind). On my first page, I select a record from a grid and a new page opens up that displays just the selected record. This TravelForm opens correctly, and the data is divided up into different sections. I have a button after each section to edit the data. So section one has an Edit button. The onclick event uses javascript to open another form (TravelEdit) as a popup to allow editing. The id of the record is in the query string of the TravelForm page (/TravelForm.aspx?id=1001). In the databind event on the TravelEdit button, I try to call the record with that ID. The query passed to the code is:
string trData = "select * from tablename where trip_id = " + Request["id"];
That is not working. I get an incorrect syntax error near '='. When I debug, I can see that no value is being passed. I've also tried:
string trData = "select * from tablename where trip_id = '" + Request.QuesrtyString["id"] + "'";
Any idea what I'm doing wrong here?
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Rajkumar GsSoftware EngineerCommented:
In the URL, is the querystring 'id' is blank ?
If URL is not visible, right-click the page and check there.
dodgerfanAuthor Commented:
No the URL is visible and you can see the id. TravelForm.aspx?id=1001.
are you writing this line in button click event?

string trData = "select * from tablename where trip_id = " + Request["id"];

than it should work properly. How do you divide the sections ? I mean what you have used for it? Divs ? or Tables?

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dodgerfanAuthor Commented:
I got this working. These suggestions helped me get it going.
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