How do I get data from the query string in asp?

Question

I am working on a project for an IT class where I need to pass in a value on the query string in a php page and read it into a hidden field on an ASP page.

I currently am passing the parameter fine from the php page to ASP, but I am pretty new to .NET in general. How do I get the data out of the string and into a variable in C#? For example, if the url is blah.com/upload?username=washington, how would I get "washington" and save it into a hidden field? Thanks a ton.

Jergason

Edit

I knew it would be easy. Thanks a ton.

Do you really want to use a hidden field, or just store the result as a local (or perhaps class-level) variable? — Noldorin
– Noldorin, Commented Mar 14, 2009 at 17:55
Yeah, it is a requirement for the class. Dunno why that would be better than storing it in a variable, but oh well. — Jamison Dance
– Jamison Dance, Commented Mar 14, 2009 at 19:06

Noldorin · Accepted Answer · 2009-03-14 17:53:13Z

13

It seems you just want:

string username = Request.QueryString["username"];

answered Mar 14, 2009 at 17:53

Noldorin

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Darin Dimitrov · Accepted Answer · 2009-03-14 17:56:23Z

4

You can add a hidden field in your aspx file:

<asp:HiddenField ID="username" runat="server" />

And in your code behind populate it from the request parameter:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        username.Value = Request["username"];
    }
}

answered Mar 14, 2009 at 17:56

Darin Dimitrov

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2 Comments

Jamison Dance Over a year ago

Okay, now another question. What is the difference between <code>Request["username"]</code> and <code>Request.QueryString["username"]</code>?

Darin Dimitrov Over a year ago

Request["username"] looks in both QueryString and Form parameters (GET and POST).

Canavar · Accepted Answer · 2009-03-14 18:20:18Z

4

This returns value from form elements :

string username = Request.Form["username"];

This returns value from querystring :

string username = Request.QueryString["username"];

This looks both form and querystring collections :

string username = Request["username"];

answered Mar 14, 2009 at 18:20

Canavar

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1 Comment

Polymath Over a year ago

Good to know Request("username") searches both query string and form variables

axel22 · Accepted Answer · 2011-07-25 13:44:58Z

-1

if session ("blnIsuSERGOOD") = False or  is null (session ("blnISuSERGoo")) = True then
Response.Redirect.Querystring("name")

edited Jul 25, 2011 at 13:44

axel22

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answered Jul 25, 2011 at 11:59

fatemeh

1

1 Comment

CCoder Over a year ago

Some explanation could be useful.

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