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());

}

score 58 · Accepted Answer · answered Jul 30 '09 at 13:36

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 '09 at 13:36

Nelson Reis

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score 27 · Answer 2 · answered Jul 30 '09 at 13:23

27

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

answered Jul 30 '09 at 13:23

RichardOD

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I knew there had to be better way to do this. I just was looking from wrong place. Thanks! – jpkeisala Jul 30 '09 at 13:45
@jpkeisala- That's the joy of a large framework. It is sometimes hard to find the right class. – RichardOD Jul 30 '09 at 14:16

score 3 · Answer 3 · edited May 23 '17 at 12:33

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 '17 at 12:33

Community

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answered Jul 30 '09 at 13:33

Ian G

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

3 Answers3

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