Is there a way to clear query string parameters when posting back?

Question

I have a form that sometimes gets linked to with some query string parameters. The problem is that when I post back the form, the query string parameter is still there. It's not really an issue the way I have it setup, but I just don't like it being there, and could see it being a problem if you needed to check for input in a certain order.

Is there a way to clear that query string parameter in an easy, clean way? I know I could change the PostBackURL on the button, but that doesn't seem too efficient.

score 12 · Accepted Answer · answered May 12 '09 at 17:28

12

No, I haven't seen a way to clear it out without a redirect.

answered May 12 '09 at 17:28

rvarcher

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Is there a clean way to do a Response.Redirect() to the page you're currently on? – John B May 12 '09 at 18:08
3

Try: Response.Redirect(Request.CurrentExecutionFilePath()) – rvarcher May 12 '09 at 19:03
I know this is really old, but CurrentExecutionFilePath is a property, so you shouldn't have the parentheses at the end. Maybe consider adding your comment to your answer to make it more complete? – Zack Aug 19 '14 at 13:11

score 7 · Answer 2 · answered May 12 '09 at 19:10

I think you've answered your own question. Use the PostBackURL property.

<asp:Button PostBackUrl='<%# Request.ServerVariables["URL"] %>' runat="server" Text="Submit" />

Or something like

foreach (Control ctrl in Page.Controls)
{
    if (ctrl is Button)
    {
        ((Button)ctrl).PostBackUrl = Request.ServerVariables["URL"];
    }
}

score 6 · Answer 3 · answered May 12 '09 at 17:38

6

put this at the bottom of your page?

<script language="javascript" type="text/javascript">
    document.forms[0].action = window.location.pathname;
</script>

answered May 12 '09 at 17:38

Al W

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1
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Or from code-behind: form1.Action = Request.Url.GetLeftPart(UriPartial.Path); – user764754 Jul 09 '14 at 08:27

score 5 · Answer 4 · edited Jun 02 '14 at 10:20

I was stuck with same issue.

I solved it using the following code block:

private void ClearQueryString()
{
    PropertyInfo isreadonly = typeof(System.Collections.Specialized.NameValueCollection).GetProperty("IsReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);
    isreadonly.SetValue(this.Request.QueryString, false, null);
    this.Request.QueryString.Remove("Action");
    this.Request.QueryString.Remove("param1");
    this.Request.QueryString.Remove("paramN");
}

score 3 · Answer 5 · edited Aug 27 '15 at 20:11

I just came across the same problem and after some hunting on the Web I found this snippet:

public void ClearQueryStrings()
{
    string clientCommand = string.Format(
      "document.forms[\"{0}\"].action = \"{1}\";",
         this.Form.Name, Request.Url.Segments[Request.Url.Segments.Length - 1]);

    ClientScript.RegisterStartupScript(this.GetType(), "qr", clientCommand, true);
}

I call ClearQueryStrings() in my Page_Load after I am done processing the original query string parameters. When the page posts back, the parameters are gone.

Original article is here.

score 3 · Answer 6 · answered May 12 '09 at 17:30

3

You can in some cases use the Server.Transfer() method, which has an overload that allows you to specify whether the querystring and form data should be preserved or not.

answered May 12 '09 at 17:30

janhartmann

14,713
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score 3 · Answer 7 · answered May 12 '09 at 20:20

I assume that you can't rely on Page.IsPostBack for some reason?

If what you're doing is server-side, then it's simple to add a check for IsPostBack in your methods (Page_Load, OnInit, etc) and only processing the querystrings if it's not a post back (i.e. the initial request).

score 0 · Answer 8 · edited Feb 18 '13 at 16:31

using System.Collections;
using System.Reflection;

Use the following code to Clear Query String Parameters.

// To clear Query string value
PropertyInfo isreadonly = typeof(System.Collections.Specialized.NameValueCollection).GetProperty("IsReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);

// make collection editable
isreadonly.SetValue(this.Request.QueryString, false, null);

// remove
this.Request.QueryString.Remove("YourQueryStringParameter");

score 0 · Answer 9 · answered Jun 23 '14 at 19:57

This method is not what you would call a redirect, but it definitely will erase the query string. Simply add this line to the end of your JavaScript code:

window.location.search = "";

Or

Add this to the end of your HTML page:

<script type="text/javascript">
    window.location.search = "";
</script>

Depending on where you insert the code, the timing of erasing the query string will change.

score 0 · Answer 10 · answered Mar 21 '16 at 07:49

0

PropertyInfo isreadonly = typeof(System.Collections.Specialized.NameValueCollection).GetProperty("IsReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);
    // make collection editable
isreadonly.SetValue(this.Request.QueryString, false, null);
     // remove

this.Request.QueryString.Remove("status");

answered Mar 21 '16 at 07:49

Vidya Vijayan

1
1

Isn't this what most of the other answers are already suggesting? – Wai Ha Lee Mar 21 '16 at 08:07

score 0 · Answer 11 · answered May 17 '16 at 10:27

0

You Can try Response.Redirect(Request.CurrentExecutionFilePath()); Its working for me.

answered May 17 '16 at 10:27

amit

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5
8
20

score 0 · Answer 12 · answered May 25 '20 at 19:30

When the javascript code is executed it will clean the url

<script language="javascript" type="text/javascript">
   var urlWithoutParams = location.protocol + "//" + location.host + location.pathname;

    function clearCurrentURL(){
        window.history.replaceState({}, document.title, urlWithoutParams);
    }
</script>

Is there a way to clear query string parameters when posting back?

12 Answers12