Some parameters missed in Request.QueryString(“returnURL”)

In my project (ASP.NET Webform), I have a hyperlink on a view. When I click on this link, it will direct me to another view on my website. Here is the link on my view.

<a href="https://mytest.com/mysite/mypage.aspx?returnURL=https://mytest.com/mysite/DynamicView.aspx?view_code=_SAA1DKIVJ&amp;module_code=R&amp;selected_row=0258B963A2">View My Ticket</a>

Now, I click the above link, and I catch the request at the Application_BeginRequest event in the Global.asax page. Please note the different values between Request.QueryString and Request.QueryString(“returnURL”).

Request.QueryString returnURL=https%3a%2f%2fmytest.com%2fmysite%2fDynamicView.aspx%3fview_code%3d_SAA1DKIVJ&module_code=R&selected_row=0258B963A2

Request.QueryString(“returnURL”)

https://mytest.com/mysite/DynamicView.aspx?view_code=_SAA1DKIVJ

As you can see, Request.QueryString(“returnURL”) is missing two parameters module_code and selected_row

I have no idea why this weird thing occurs. I am expecting Request.QueryString(“returnURL”) should have the same value as Request.QueryString.

I would appreciate your help in this matter!

Answers:

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Method 1

You need to encode the parameters properly. There are two ? in the url, that is not allowed.

<a href="https://mytest.com/mysite/mypage.aspx?returnURL=<%= 
    HttpUtility.UrlEncode("https://mytest.com/mysite/DynamicView.aspx?view_code=_SAA1DKIVJ&module_code=R&selected_row=0258B963A2") 
 %>">View My Ticket</a>


All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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