httpcontext.current.request default return value if not set

httpcontext request.querystring
Josh picture Josh · Jul 3, 2012 · Viewed 11.7k times · Source

I've spent a lot of time googling this and testing in my program, but I can't get any output. I'm coding in C# codebehind aspx. I'm trying to query the url of

anUnknownWebsite.aspx?SerialNumber=CND0340482

And getting the serial number with the httpcontext.current.request["SerialNumber"] method.

One half of my program works fine, where if the serial number is set in the URL, everything works fine, but I want to have a boolean statement like the following:

    if(HttpContext.Current.Request["SerialNumber"] == null)
    {
    Do this
    }else
    {
    Do something else
    }

I just want to know if the method will have a default value or a null value to get a boolean from because the if statement above doesn't work. Open to try any new ideas or theories on this.

Thanks guys

Answer

McGarnagle picture McGarnagle · Jul 3, 2012

It should be null (not an empty string / default value), but try this...

if(HttpContext.Current.Request.QueryString["SerialNumber"] == null) {
    // ...
}

If you know SerialNumber is in the query string, you can use Request.QueryString, otherwise you'll be also be checking the form variables, cookies, and server variables.

Related questions

How to get the QueryString from an ashx file?

There is an ashx file containing "ProcessRequest(HttpContext context)" method which gets triggered automatically. When and how does it get fired? Another question, How can I get the current QueryString when I am inside this file? When I type "context.…

Read More
Setting HttpContext.Current.Session in a unit test

I have a web service I am trying to unit test. In the service it pulls several values from the HttpContext like so: m_password = (string)HttpContext.Current.Session["CustomerId"]; m_userID = (string)HttpContext.Current.Session["CustomerUrl"]; in the unit …

Read More
Mock HttpContext.Current in Test Init Method

I'm trying to add unit testing to an ASP.NET MVC application I have built. In my unit tests I use the following code: [TestMethod] public void IndexAction_Should_Return_View() { var controller = new MembershipController(); controller.SetFakeControllerContext("TestUser"); ... } With the …

Read More