How to remove query string parameters from the url?

Question

Assume I have the link http://www.somesite.com/file.aspx?a=1&b=2

And now I want to remove all the parameters, so it becomes:

http://www.somesite.com/file.aspx

Or I may want to remove only 1 of the parameters such as

http://www.somesite.com/file.aspx?b=2

Is there a way to do the above in C#? What is happening is that I am coming from another page with a parameter called edit in the url, but when the page does a post back, the edit parameter is still there, so it still thinks it is in edit mode. Example:

User A goes to page one.aspx and clicks on an edit link. They are taken to two.aspx?edit=true. During page load, it sees the the query string parameter edit is not null and it puts the contents in edit mode. Once the user is done editing, the page is refreshed, but the url is still two.aspx?edit=true and keeps the contents in edit mode, when in fact it should be two.aspx

this. __curious_geek · Accepted Answer · 2009-12-23 06:46:12Z

13

Request.Querystring is read-only collection - You cannot modify that.

If you need to remove or change the param in querystring only way out is to trigger a new GET request with updated querystring - This means you will have to do Response.Redirect with updated URL. This will cause you lose the viewstate of the current page.

answered Dec 23, 2009 at 6:46

this. __curious_geek

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2 Comments

Xaisoft Over a year ago

That's what I actually was doing, so I guess I am stuck with that. Thanks.

Pierre Over a year ago

If you use sessions, you have no problem

dvjanm · Accepted Answer · 2013-07-09 12:38:01Z

2

Use the PostBackUrl property, for example:

<asp:Button ID="DoneEditingButton" runat="server" Text="Done editing" PostBackUrl="~/two.aspx" />

answered Jul 9, 2013 at 12:38

dvjanm

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Comments

Sonosp · Accepted Answer · 2017-10-12 13:20:35Z

2

Try something like this.

if (url.Contains("?"))
            url = url.Substring(0, url.IndexOf("?"));

In this example, I'm checking if the url even contains a query string, and if it does, subtracting getting the "left part" of the string prior to the ?.

edited Oct 12, 2017 at 13:20

answered Oct 12, 2017 at 10:07

Sonosp

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2 Comments

Toby Speight Over a year ago

Welcome to Stack Overflow! Thank you for this code snippet, which might provide some limited, immediate help. A proper explanation would greatly improve its long-term value by showing why this is a good solution to the problem, and would make it more useful to future readers with other, similar questions. Please edit your answer to add some explanation, including the assumptions you've made.

Vetras Over a year ago

again, urls can be encoded and '?' becomes '%3F'. this manipulation should be done using Uri class or similar

Jeff Beck · Accepted Answer · 2009-12-23 06:50:59Z

1

When you are done with the edit you are doing a post back so just define the action to post to two.aspx instead of just posting back to itself that way it will drop off the get parameters.

answered Dec 23, 2009 at 6:50

Jeff Beck

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Comments

RickNZ · Accepted Answer · 2009-12-23 09:01:03Z

1

How about checking Page.IsPostBack to see if the current request is a postback or not?

answered Dec 23, 2009 at 9:01

RickNZ

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Marek Manduch · Accepted Answer · 2014-08-11 15:26:29Z

1

if you have only string, you can use:

strinULR.Split('?').First();

or

strinULR.Split('?').FirstOrDefault();

answered Aug 11, 2014 at 15:26

Marek Manduch

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1 Comment

Vetras Over a year ago

urls can be encoded and '?' becomes '%3F'. this manipulation should be done using Uri class or similar

alternatefaraz · Accepted Answer · 2015-04-10 11:08:06Z

0

Late but you can do this to remove query string from URL without another GET Request. http://www.codeproject.com/Tips/177679/Removing-Deleting-Querystring-in-ASP-NET

answered Apr 10, 2015 at 11:08

alternatefaraz

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