Generate temporary URL to reset password

Question

I am looking to implement a Forgot Password feature on my website. I like the option where an email containing a temporary one-time use URL that expires after some time is sent

Answer 1

I used a Hashing Class to create unique automatic logins made up of the current date/time and the users email address:

string strNow = DateTime.Now.ToString();
string strHash = strNow + strEmail;
strHash = Hash.GetHash(strHash, Hash.HashType.SHA1);

get the Hash Class from: http://www.developerfusion.com/code/4601/create-hashes-md5-sha1-sha256-sha384-sha512/

Then just take it from the URL using:

if (Request.QueryString["hash"] != null)
{
                //extract Hash from the URL
                string strHash = Request.QueryString["hash"];
}