URL with multiple parameters as a query string in ASP.NET

Question

In ASP.NET, I build a string redirectURL to redirect to ADFS form with multiple query string parameters. One such complex parameter is the returnURL with multiple parameters.

My problem is that only the first parameter of the returnURL is available when it actually return.

E.g. redirectURL = <br> 
https://aaa.aaa/adfs/Form.aspx <br>
?DomainName=domain <br>
&AccountName=account <br>
&returnURL=https://bbb.bbb/MyPage.aspx?param1=111&param2=222

I know it complicates when identify the &amp symbol of actual parameters and parameters in returnURL. Please help me to fix this.

Thanks in advance.

Why are you passing a page with params to a page with params? What kind of functionality are you trying to achieve? — IrishChieftain
– IrishChieftain, Commented Jan 12, 2013 at 14:28
To build the redirectURL there's a specific method and it builds only main three parameters (DomainName, AccountName, returnURL). Then after the function at Form.aspx it again redirect to returnURL. I want two parameters in that return url. It may sounds complicated, but I hope it isn't impossible.. Pls help — user1408470
– user1408470, Commented Jan 12, 2013 at 14:38

Adam Tal · Accepted Answer · 2013-01-12 14:37:22Z

11

You should use HttpUtility.UrlEncode when composing the link and HttpUtility.UrlDecode when resolving it.

For your case it should be something similar to:

"https://aaa.aaa/adfs/Form.aspx?DomainName=domain&AccountName=account&returnURL=" + 
    HttpUtility.UrlEncode("https://bbb.bbb/MyPage.aspx?param1=111&param2=222")

And then at the target use:

HttpUtility.UrlDecode(Request.QueryString["returnURL"])

answered Jan 12, 2013 at 14:37

Adam Tal

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1 Comment

user1408470 Over a year ago

Thanks a lot. Sorry it took sometimes for me to test this implementation.

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