Is there a way to get all the querystring name/value pairs into a collection?

Is there a way to get all the querystring name/value pairs into a collection?

I’m looking for a built in way in .net, if not I can just split on the & and load a collection.

Answers:

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Method 1

Yes, use the HttpRequest.QueryString collection:

Gets the collection of HTTP query string variables.

You can use it like this:

foreach (String key in Request.QueryString.AllKeys)
{
    Response.Write("Key: " + key + " Value: " + Request.QueryString[key]);
}

Method 2

Well, Request.QueryString already IS a collection. Specifically, it’s a NameValueCollection. If your code is running in ASP.NET, that’s all you need.

So to answer your question: Yes, there is.

Method 3

You can use LINQ to create a List of anonymous objects that you can access within an array:

var qsArray = Request.QueryString.AllKeys
    .Select(key => new { Name=key.ToString(), Value=Request.QueryString[key.ToString()]})
    .ToArray();

Method 4

If you have a querystring ONLY represented as a string, use HttpUtility.ParseQueryString to parse it into a NameValueCollection.

However, if this is part of a HttpRequest, then use the already parsed QueryString-property of your HttpRequest.

Method 5

QueryString property in HttpRequest class is actually NameValueCollection class. All you need to do is

NameValueCollection col =
Request.QueryString;

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