Get full query string in C ASP NET

Question

As a PHP programmer I m used to using   GET to retrieve the HTTP query string    and if I need the whole string  theres loads of ways to do it    In ASP however  I can t seem to get the query   Here is the code for news aspx  embedded in some HTML     lt                                    string URL    http   www example com rendernews php   Request Querystring      System Net WebClient wc   new System Net WebClient        string data   wc DownloadString URL       Response Output Write data     gt    I am fetching a PHP script s output from a remote server  and this works perfectly without the Request Querystring    The issue is that I m trying to get the full query string on the first line  Request Querystring  I am getting an error  Object reference not set to an instance of an object  which basically means that Request Querystring doesn t exist   Any idea what the problem is here  How can I get that query string so when index aspx is called like http   test com news aspx id 2 my script fetches http   www example com rendernews php id 2

User · Answer

just a moment ago  i came across with the same issue  and i resolve it in the following manner   Response Redirect     index aspx Name   this textName Text   amp LastName   this textlName Text     with reference to the this

User · Answer

Request QueryString returns you a collection of Key Value pairs representing the Query String  Not a String  Don t think that would cause a Object Reference error though  The reason your getting that is because as Mauro pointed out in the comments  It s QueryString and not Querystring    Try    Request QueryString ToString      or   lt                                        string URL   Request Url AbsoluteUri      System Net WebClient wc   new System Net WebClient        string data   wc DownloadString URL       Response Output Write data     gt    Same as your code but Request Url AbsoluteUri will return the full path  including the query string

User · Answer

This should work fine for you   Write this code in the Page Load event of the page   string ID   Request QueryString  id   ToString    Response Redirect  http   www example com rendernews php id     ID

User · Answer

I have tested your example  and while Request QueryString is not convertible to a string neither implicit nor explicit still the  ToString   method returns the correct result   Further more when concatenating with a string using the     operator as in your example it will also return the correct result  because this behaves as if  ToString   was called    As such there is nothing wrong with your code  and I would suggest that your issue was because of a typo in your code writing  Querystring  instead of  QueryString    And this makes more sense with your error message since if the problem is that QueryString is a collection and not a string it would have to give another error message

User · Answer

Just use Request QueryString ToString   to get full query string  like this   string URL    http   www example com rendernews php   Request Querystring ToString

User · Answer

Try Request Url Query if you want the raw querystring as a string

[c#] Get full query string in C# ASP.NET

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