HttpCookie Class
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HttpCookie Class

 

Provides a type-safe way to create and manipulate individual HTTP cookies.

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

System.Object
  System.Web.HttpCookie

public sealed class HttpCookie

NameDescription
System_CAPS_pubmethodHttpCookie(String)

Creates and names a new cookie.

System_CAPS_pubmethodHttpCookie(String, String)

Creates, names, and assigns a value to a new cookie.

NameDescription
System_CAPS_pubpropertyDomain

Gets or sets the domain to associate the cookie with.

System_CAPS_pubpropertyExpires

Gets or sets the expiration date and time for the cookie.

System_CAPS_pubpropertyHasKeys

Gets a value indicating whether a cookie has subkeys.

System_CAPS_pubpropertyHttpOnly

Gets or sets a value that specifies whether a cookie is accessible by client-side script.

System_CAPS_pubpropertyItem[String]

Gets a shortcut to the HttpCookie.Values property. This property is provided for compatibility with previous versions of Active Server Pages (ASP).

System_CAPS_pubpropertyName

Gets or sets the name of a cookie.

System_CAPS_pubpropertyPath

Gets or sets the virtual path to transmit with the current cookie.

System_CAPS_pubpropertySecure

Gets or sets a value indicating whether to transmit the cookie using Secure Sockets Layer (SSL)--that is, over HTTPS only.

System_CAPS_pubpropertyShareable

Determines whether the cookie is allowed to participate in output caching.

System_CAPS_pubpropertyValue

Gets or sets an individual cookie value.

System_CAPS_pubpropertyValues

Gets a collection of key/value pairs that are contained within a single cookie object.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

The HttpCookie class gets and sets properties of individual cookies. The HttpCookieCollection class provides methods to store, retrieve, and manage multiple cookies.

ASP.NET includes two intrinsic cookie collections. The collection accessed through the Cookies collection of the HttpRequest object contains cookies transmitted by the client to the server in the Cookie header. The collection accessed through the Cookies collection of the HttpResponse object contains new cookies created on the server and transmitted to the client in the Set-Cookie HTTP response header.

The following code example demonstrates how to check for a cookie named DateCookieExample in the HttpRequest object. If the cookie is not found, it is created and added to the HttpResponse object. The cookie is set to expire in 10 minutes.

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    protected void Page_Load(object sender, EventArgs e)
    {
        StringBuilder sb = new StringBuilder();
        // Get cookie from the current request.
        HttpCookie cookie = Request.Cookies.Get("DateCookieExample");

        // Check if cookie exists in the current request.
        if (cookie == null)
        {
            sb.Append("Cookie was not received from the client. ");
            sb.Append("Creating cookie to add to the response. <br/>");
            // Create cookie.
            cookie = new HttpCookie("DateCookieExample");
            // Set value of cookie to current date time.
            cookie.Value = DateTime.Now.ToString();
            // Set cookie to expire in 10 minutes.
            cookie.Expires = DateTime.Now.AddMinutes(10d);
            // Insert the cookie in the current HttpResponse.
            Response.Cookies.Add(cookie);
        }
        else
        {
            sb.Append("Cookie retrieved from client. <br/>");
            sb.Append("Cookie Name: " + cookie.Name + "<br/>");
            sb.Append("Cookie Value: " + cookie.Value + "<br/>");
            sb.Append("Cookie Expiration Date: " + 
                cookie.Expires.ToString() + "<br/>");
        }
        Label1.Text = sb.ToString();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>HttpCookie Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:Label id="Label1" runat="server"></asp:Label>
    </div>
    </form>
</body>
</html>

.NET Framework
Available since 1.1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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