Why # not work in query string?

Question

In cs.aspx page i have a button with following code:

protected void Button1_Click(object sender, EventArgs e)
{
    Response.Redirect("~/cs.aspx?p=ali#25");
}

In page_load i get query string and display it:

protected void Page_Load(object sender, EventArgs e)
{
    if (Request.QueryString["p"] != null)
    {
        string p = Request.QueryString["p"];
        Response.Write("p= "+p);
    }
}

in query string:

p  = ali#25

but in run time display

p = ali

why string after # not shown.

# is a reserved character and has meaning in urls; the part of the URL after # is never sent to the server. If you mean to represent the value "ali#25", you will need to url-encode it - but you should be doing that anyway, as a matter of routine. — Marc Gravell
– Marc Gravell, Commented Oct 25, 2013 at 8:43

Samiey Mehdi · Accepted Answer · 2013-10-25 08:26:33Z

1

found a solution. use Server.UrlEncode:

Response.Redirect("~/cs.aspx?pass="+Server.UrlEncode("a#25"));

answered Oct 25, 2013 at 8:26

Samiey Mehdi

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2 Comments

greg84 Over a year ago

For completeness, the # is being treated as a page anchor. See echoecho.com/htmllinks08.htm

शेखर Over a year ago

You should always use Url-Encoding before sending the actual values to URL

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