How do I access the variables from urls that come from the GET method in ASP.net?

Question

Asp.net has turned out to be alot easier to use than PHP (so far). However, I have been searching for a while and simply cannot figure this out. How do I get the variables that are contained in the url of my page (that originate from a form that had the method "GET") and utilize them?

For example, my page would be www.example.com/index.asp?somevariable=something

How would I get the value of somevariable?

Answer 1

It's as easy as :

Request.QueryString["somevariable"]; // C#
Request.QueryString("somevariable") ' VB

Answer 2

This is for ASPX c#:

NameValueCollection pColl = Request.Params;
if (pColl["somevariable"] != null)
{
    string yourvalue = pColl["somevariable"];
}

Answer 3

You can use what ybo stated, but it isn't complete (for VB at least). That alone could leave to a null reference exception being thrown. You want to cast (i.e. TryParse) the values, and handle any empty parameters that your expected to contain a value:

Dim itemId As Integer
Dim itemType as String

If Not Integer.TryParse(Request.QueryString("i").ToString, itemId) Then
    itemId = -1 ' Or whatever your default value is
Else
    ' Else not required. Variable itemId contains the value when Integer.TryParse returns True.
End If

itemType = Request.QueryString("t").ToString ' <-- ToString important here!

Answer 4

Any decent HTTP framework or library or piece of software, script/native/managed/routed, can cook/break down/crack the URL components for you.

Request.QueryString is an ancient way of dealing with it. Look up Uri Template mechanisms or new MVC bits. You'll need it sooner or later.

Answer 5

NameValueCollection col1 = Request.Query; name=col1.GetValues("somevariable")[0].ToString();