Most optimal way to parse querystring within a string in C#

Question

I have a querystring alike value set in a plain string. I started to split string to get value out but I started to wonder that I can proabably write this in one line instead. Could you please advice if there is more optimal way to do this?

I am trying to read "123" and "abc" like in Request.QueryString but from normal string.

 protected void Page_Load(object sender, EventArgs e)
{
    string qs = "id=123&xx=abc";
    string[] urlInfo = qs.Split('&');
    string id = urlInfo[urlInfo.Length - 2];
    Response.Write(id.ToString());

}

Nelson Reis · Accepted Answer · 2009-07-30 13:36:32Z

58

You can do it this way:

using System.Collections.Specialized;

NameValueCollection query = HttpUtility.ParseQueryString(queryString);
Response.Write(query["id"]);

Hope it helps.

answered Jul 30, 2009 at 13:36

Nelson Reis

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RichardOD · Accepted Answer · 2009-07-30 13:23:28Z

27

Look at HttpUtility.ParseQueryString. Don't reinvent the wheel.

answered Jul 30, 2009 at 13:23

RichardOD

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2 Comments

jpkeisala Over a year ago

I knew there had to be better way to do this. I just was looking from wrong place. Thanks!

RichardOD Over a year ago

@jpkeisala- That's the joy of a large framework. It is sometimes hard to find the right class.

Community · Accepted Answer · 2017-05-23 12:33:44Z

3

RichardOD is on it with HttpUtility.ParseQueryString but don't forget to look at TryParse.

You can TryParse int, DateTimes etc

How do you test your Request.QueryString[] variables?

edited May 23, 2017 at 12:33

CommunityBot

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answered Jul 30, 2009 at 13:33

Ian G

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