send a url with multiple querystring as a querystring parameter in asp.net

Question

I need to send a redirect url as a query string parameter, unfortunately this url contains more than one querystring parameter as follows

"http://host:port/page2.aspx?param1=value&param2=value&param3=value"

the problem is when I encode this url and send it via querystring , it looks as if it wasn't encoded , so my application consider the redirect url parameter value to be only

"http://host:port/page2.aspx?param1=value"

and consider

"&param2=value&param3=value"

as a part of the current url

I tried Server.UrlEncode and Server.HtmlEncode

Could you show your code? The one you have tried with Server.UrlEncode and which didn't work? — Darin Dimitrov
– Darin Dimitrov, Commented Dec 2, 2012 at 15:22
it did Encode the url, but once it is redirected the encoding just disappear and the query string looks as if it was never encoded with all the '&' chars visible in the url in browser if it might help you to know the url is constructed in code behind and added to a link button PostBackUrl property when the grid is bound, since the link button is in a grid view rows — Maha Khairy
– Maha Khairy, Commented Dec 2, 2012 at 15:25
string url = string.Format("~/MyFolder/Page.aspx?Id={0}&RedirectUrl={1}", Id, Server.UrlEncode(MyRedirectUrl)); — Maha Khairy
– Maha Khairy, Commented Dec 2, 2012 at 15:29

Anujith · Accepted Answer · 2012-12-02 15:43:44Z

string myUrl = “http://host:port/page2.aspx?param1=value&param2=value&param3=value��;

string EncodedUrl = myUrl.EncodeTo64();

Pass this as querystring and retrieve using :

    EncodedUrl.DecodeFrom64();

Functions:

public static string EncodeTo64(this string target)
    {

        byte[] toEncodeAsBytes

              = System.Text.ASCIIEncoding.ASCII.GetBytes(target);

        string returnValue

              = System.Convert.ToBase64String(toEncodeAsBytes);

        return returnValue;

    }

public static string DecodeFrom64(this string target)
    {

        byte[] encodedDataAsBytes

            = System.Convert.FromBase64String(target);

        string returnValue =

           System.Text.ASCIIEncoding.ASCII.GetString(encodedDataAsBytes);

        return returnValue;

    }

sreejithsdev · Accepted Answer · 2012-12-02 16:18:14Z

0

Replace '&' in your url with '%26' or use Server.UrlEncode

Responsse.redirect("redirectURL?a='http://url2?a=5%26b=7'&b=9'");
 or
Responsse.redirect("redirectURL?a="+Server.UrlEncode("http://url2?a=5&b=7")+"&b=9'");

answered Dec 2, 2012 at 16:18

sreejithsdev

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Comments

phil soady · Accepted Answer · 2012-12-02 16:19:57Z

0

Encode the URL

System.Web.HttpUtility.UrlEncode(string url)

answered Dec 2, 2012 at 16:19

phil soady

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