c# rewrite url parameter

Question

I have a simple task without a simple solution. I have a parameter in the browser that needs to be changed or rewritten

for instance www.contoso.com/countries.aspx?country=UK

all I need is to rewrite the parameter without checking the url so it might appear as:

www.contoso.com/countries.aspx?country=France

I have tried something like that but with no joy

string parameter2 = Request.QueryString["country"];
Context.RewritePath(parameter2.Replace("?country=", "France"));

after an event like a button or hyperlink, the code should just change that parameter without changing anything else — user1211929
– user1211929, Commented Jun 13, 2012 at 10:32

Carl Winder · Accepted Answer · 2012-06-13 11:02:35Z

1

You could do something like this:

var url = "www.contoso.com/countries.aspx?country={0}";

var country = "UK";

url = String.Format(url, country);

Alternatively you can do:

var url = Request.Url.AbsolutePath;

var country = Request.QueryString["country"];

url = url.Replace(country, "UK");

Then:

Response.Redirect(url);

edited Jun 13, 2012 at 11:02

answered Jun 13, 2012 at 10:28

Carl Winder

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3 Comments

user1211929 Over a year ago

Thanks, the url already comes as www.contoso.com/countries.aspx?country=UK, I need to repost the parameter.

Carl Winder Over a year ago

ahhh so this will only work if you know the URL in advance which I am guessing you do not know it in advance

user1211929 Over a year ago

It worked really well, I tweaked your example a bit, the response.redirect made me understand how to repostback the string thanks

Gaz Winter · Accepted Answer · 2012-06-13 10:19:01Z

0

Can you not read the whole URL into a string, split it on the '?' and then add your new bit to the first part of the string?

Something like this:

    var url = Request.QueryString;
    var newUrl = url.split('?');
    url = newUrl[0] + "?country=France";

I dont know if that will work, its just a thought

answered Jun 13, 2012 at 10:19

Gaz Winter

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1 Comment

walther Over a year ago

Unnecessary. Why to do it like this? He has problems with rewriting, getting a parameter shouldn't be an issue...

Estefany Velez · Accepted Answer · 2012-06-13 10:29:04Z

0

If you want to replace the complete querystring, use

newVal = string.LastIndexOf("?");

and then

URL.Replace(oldVal, newVal);

OR if you have just one parameter in querystring and want to replace only value of it, use

newVal = string.LastIndexOf("=");
URL.Replace(oldVal, newVal);

answered Jun 13, 2012 at 10:29

Estefany Velez

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Comments

Community · Accepted Answer · 2017-05-23 10:34:48Z

0

Look at this detailed response for solution to your problem.

edited May 23, 2017 at 10:34

CommunityBot

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answered Jun 13, 2012 at 11:01

Ebad Masood

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