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HttpRequest.Params Property

Updated: February 2010

Gets a combined collection of QueryString, Form, Cookies, and ServerVariables items.

Namespace:  System.Web
Assembly:  System.Web (in System.Web.dll)

public NameValueCollection Params { get; }

Name-value pairs are added to the collection in the following order:

  1. Query-string parameters.

  2. Form fields.

  3. Cookies.

  4. Server variables.

The following code example iterates through the Params property for a page and displays each key and corresponding value on the page.

<%@ Page Language="C#"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
<script runat="server">

    private void Page_Load(object sender, EventArgs e)
        // Create a string to contain the paramaters' 
        // information.
        string paramInfo = "";

        // Obtain a reference to the Request.Params 
        // collection.
        NameValueCollection pColl = Request.Params;

        // Iterate through the collection and add 
        // each key to the string variable. 
        for(int i = 0; i <= pColl.Count - 1; i++)
            paramInfo += "Key: " + pColl.GetKey(i) + "<br />";

            // Create a string array that contains 
            // the values associated with each key.
            string[] pValues = pColl.GetValues(i);

            // Iterate through the array and add 
            // each value to the string variable. 
            for(int j = 0; j <= pValues.Length - 1; j++)
                paramInfo += "Value:" + pValues[j] + "<br /><br />";


        // Set a Label's Text property to the values 
        // contained in the string variable.
        lblValues.Text = paramInfo;

<html xmlns="" >
    <title>ASP.NET Example</title>
    <form id="form1" runat="server">
        <asp:Label id="lblValues" runat="server" />

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0




February 2010

Described the order in which items appear in the collection.

Customer feedback.