Posted By

krisdb on 04/06/09

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c-sharp

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umang_nine

ReplaceQueryParameterValue

/ Published in: C#

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Response.Redirect(ReplaceQueryParameterValue(Request.RawUrl, "all", "1"));
 
        private string ReplaceQueryStringValue(string url, string key, string value)
        {
            return url.Contains(key) ? Regex.Replace(url, @"([?&]" + key + ")=[^?&]+", "$1=" + value) : (url + (url.Contains("?") ? "&" : "?") + key + "=" + value);
        }
 
 
        private string ReplaceQueryParameterValue(string query, string name, string value)
        {
            string output;
 
            if (query.Contains(name + "="))
            {
                output = System.Text.RegularExpressions.Regex.Replace(query,
                             @"(&|\?)" + name + @"=[0-9A-Za-z\+\!\*\(\)\'\-\$\,\.]+", @"$1" + name + "=" + value,
                             System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            }
            else
                output = query + (query.Contains("?") ? "&" : "?") + name + "=" + value;
 
            return output;
        }

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Posted By: rogeskic on February 4, 2011

Hello, thanks for doing this! Howe can this be changed to support replacing a value that is encoded URL?? Any help would be appreciated.

Even if i replace it with an empty string (""), the result is that "HTTP" gets replaced, and the rest of the parameter value stays. coverimage=http%3A%2F%2Fgalleryserver....
coverimage=%3A%2F%2Fgalleryserver....

For example: If I start with this: "http://www.zazzle.com/api/create/at-238965785060790379?rf=238345325100453699&ax=DesignBlast&cg=196484196445896905&ed=true&br=true&rcg=196484196445896905&ds=true&continueUrl=http%3A%2F%2Fwww.zazzle.com%2Fmainepictures&rut=Go%20back%20to%20MainePictures's%20store&fwd=ProductPage&coverimage=http%3A%2F%2Fgalleryserver.greatmainepictures.com%2Fgs%2Fhandler%2Fgetmediaobject.ashx%3Fmoid%3D6%26dt%3D3%26g%3D0"

And want to replace the parameter "coverimage" with even just an empty String, ("") I get this as a result:

"http://www.zazzle.com/api/create/at-238965785060790379?rf=238345325100453699&ax=DesignBlast&cg=196484196445896905&ed=true&br=true&rcg=196484196445896905&ds=true&continueUrl=http%3A%2F%2Fwww.zazzle.com%2Fmainepictures&rut=Go%20back%20to%20MainePictures's%20store&fwd=ProductPage&coverimage=%3A%2F%2Fgalleryserver.greatmainepictures.com%2Fgs%2Fhandler%2Fgetmediaobject.ashx%3Fmoid%3D6%26dt%3D3%26g%3D0"

Posted By: krisdb on February 21, 2011

Did you try URLDecoding it?

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