Can I automatically remove a parameter on querystring with Request.Url.Query?
Question
When I get the querystring with Request.Url.Query I'd like to exclude a parameter (without using replace, or function like these).
So, for example, if I have this querystring :
?ID=1241&IDL=241&HC=1241
I'd like to exclude IDL getting :
?ID=1241&HC=1241
Is this a implemented way or I need to make my own function?
EDIT : I care about the order of my query string values.
2 answers
solution1
4 ACCPTED 2012-01-19 17:01:48
It's still string manipulation, but how about something like:
String.Concat("?",
String.Join("&",
Request.Url.Query.Substring(1)
.Split('&')
.Where(k => !k.StartsWith("IDL="))
.ToArray() // For .NET versions prior to v4.0
)
)
Alternatively you could use Request.QueryString to get at a processed collection of query-string parameters.
EDIT: This will leave your parameters in the order they were sent.
Here's a sample ASPX page that outputs a modified query-string (I've tested it in a ASP.NET 3.5 Web-Site):
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Import Namespace="System.Linq" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Query String Removal</title>
</head>
<body>
Modified query-string: <%=
String.Concat("?",
String.Join("&",
Request.Url.Query.Substring(1)
.Split('&')
.Where(k => !k.StartsWith("IDL="))
.ToArray() // For .NET versions prior to v4.0
)
)
%>
</body>
</html>
NOTE: System.Linq has been imported. An exception will be raised if you don't specify a query-string.
solution2
2 2014-01-27 10:49:26
I used this which can be called multiple times if you have a list of keys that you want removed from the querystring if they exists:
private string RemoveQueryStringItemWithKeyName(string url, string keyName)
{
var urlItemRemoved = String.Join("&", url.Split('&').Where(k => !k.StartsWith(keyName + "=")));
return urlItemRemoved;
}
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