?
Solved

asp.net c# read query string from referering page

Posted on 2010-09-21
7
Medium Priority
?
723 Views
Last Modified: 2013-11-07
Hi

I know you can access parts of the query string in asp.net using Request.QueryString["session"]

Does anybody know how to access the various parts of the query string of the refering page?
0
Comment
Question by:zattz
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
7 Comments
 
LVL 10

Expert Comment

by:james-ct16
ID: 33731511
Howdy

To the best of my knowledge that is simply not possible. To achieve this you would have to re transmit from the previous page ie place them in hidden form values or append them to the link address

Regards

James
0
 
LVL 2

Expert Comment

by:Ahrensy
ID: 33731513
Request.QueryString returns the variables passed to the webpage via the GET method.

Example:
http://www.example.com/index.asp?variable1=45&variable2=34


--index.asp--
<%
Response.Write("<br>" + Request.QueryString("variable1"));
Response.Write("<br>" + Request.QueryString("variable2"));
%>

Open in new window

0
 
LVL 10

Expert Comment

by:james-ct16
ID: 33731523
however having just said that you could get some of that detail out of Request.ServerVariables("HTTP_REFERER") if it is set by the browser however it is not always so you cant account for it
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 

Author Comment

by:zattz
ID: 33731542
I'm looking for a way to parse the referer so I can access it in a nice way like the request's parameters... ie: Referer.QueryString["session"]
0
 
LVL 10

Accepted Solution

by:
james-ct16 earned 2000 total points
ID: 33731601
So just to extend my last post further, if the browser does include the refering page then you would have to pick the key pairs out yourself through string manipulation. Code example attached it will need more error checking.

I must stress this is not a reliable method though.

What you should be doing is submitting these values as part of a form or as part of your link.


string refer = Request.ServerVariables("HTTP_REFERER");
            if (!string.IsNullOrEmpty(refer) && refer.Contains("?"))
            {
                refer = refer.Substring(refer.IndexOf("?")+1);
                string[] keyValuePairs = refer.Split('&');
                Dictionary<string, string> queryString = new Dictionary<string, string>();
                foreach (string s in keyValuePairs)
                {
                    string[] pair = s.Split('=');
                    if (pair.Length == 2)
                    {
                        queryString.Add(pair[0], pair[1]);
                    }
                }

                System.Diagnostics.Debug.WriteLine(queryString["variable1"]);
            }

Open in new window

0
 

Author Comment

by:zattz
ID: 33731627
           string r = Request.ServerVariables("HTTP_REFERER");
            r = r.Substring(r.IndexOf("?") + 1);
            HttpRequest h = new HttpRequest("", "http://www.site.com", r);
            MessageBox.Show(h.QueryString["XYZ"]);
0

Featured Post

Want to be a Web Developer? Get Certified Today!

Enroll in the Certified Web Development Professional course package to learn HTML, Javascript, and PHP. Build a solid foundation to work toward your dream job!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

ASP.Net to Oracle Connectivity Recently I had to develop an ASP.NET application connecting to an Oracle database.As I am doing it first time ,I had to solve several problems. This article will help to such developers  to develop an ASP.NET client…
Entity Framework is a powerful tool to help you interact with the DataBase but still doesn't help much when we have a Stored Procedure that returns more than one resultset. The solution takes some of out-of-the-box thinking; read on!
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …
Suggested Courses

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question