301 redirect using IIS

To 301 redirect in IIS from http:// to https://,

1. Setup another site and set TCP port to 80 (original site uses other value).
2. Under "Home Directory",
Select "A redirection to a URL",
In Redirect to, type "https://www.example.com$S$Q

3. Check "The exact URL entered above" and "A Permanent redirection for this resource".

Web Design From Scratch

http://webdesignfromscratch.com/

http://office.microsoft.com/en-us/frontpage/HA011671221033.aspx

Generate a CSV from a generic list of objects using reflection and extension methods

http://www.joe-stevens.com/2009/08/03/generate-a-csv-from-a-generic-list-of-objects-using-reflection-and-extension-methods/

using System.Text;
using System.Reflection;

public static class Extensions
{
    public static string GetCSV(this List list)
    {
        StringBuilder sb = new StringBuilder();

        //Get the properties for type T for the headers
        PropertyInfo[] propInfos = typeof(T).GetProperties();
        for (int i = 0; i <= propInfos.Length - 1; i++)
        {
            sb.Append(propInfos[i].Name);

            if (i < propInfos.Length - 1)
            {
                sb.Append(",");
            }
        }

        sb.AppendLine();

        //Loop through the collection, then the properties and add the values
        for (int i = 0; i <= list.Count - 1; i++)
        {
            T item = list[i];
            for (int j = 0; j <= propInfos.Length - 1; j++)
            {
                object o = item.GetType().GetProperty(propInfos[j].Name).GetValue(item, null);
                if (o != null)
                {
                    string value = o.ToString();

                    //Check if the value contans a comma and place it in quotes if so
                    if (value.Contains(","))
                    {
                        value = string.Concat("\"", value, "\"");
                    }

                    //Replace any \r or \n special characters from a new line with a space
                    if (value.Contains("\r"))
                    {
                        value = value.Replace("\r", " ");
                    }
                    if (value.Contains("\n"))
                    {
                        value = value.Replace("\n", " ");
                    }

                    sb.Append(value);
                }

                if (j < propInfos.Length - 1)
                {
                    sb.Append(",");
                }
            }

            sb.AppendLine();
        }

        return sb.ToString();
    }
}

Avoid concurrent login (logout former login session) in ASP.net membership

In login.aspx:
protected void Login1_LoggedIn(object sender, EventArgs e)
{

string sKey = Login1.UserName;
string sValue = Session.SessionID;
Session[sKey] = sValue;
TimeSpan SessTimeOut = new TimeSpan(0, 0, HttpContext.Current.Session.Timeout, 0, 0);
HttpContext.Current.Cache.Insert(sKey, sValue, null, DateTime.MaxValue, SessTimeOut,
System.Web.Caching.CacheItemPriority.NotRemovable, null);

}

In Master Page of admin:
protected void Page_Load(object sender, EventArgs e)
{
string sValue = Cache[HttpContext.Current.User.Identity.Name].ToString();
if (Session.SessionID != sValue)
{
FormsAuthentication.SignOut();
Response.Redirect("login.aspx");
}
}

http://stackoverflow.com/questions/2025908/avoid-concurrent-login-logout-former-login-session-in-asp-net-membership

ASP.NET Membership

http://www.4guysfromrolla.com/articles/120705-1.aspx

http://weblogs.asp.net/scottgu/archive/2006/02/24/ASP.NET-2.0-Membership_2C00_-Roles_2C00_-Forms-Authentication_2C00_-and-Security-Resources-.aspx

Hash and Encryption

Hash
Hash is 1 way which cannot be decrypted.
Hash method:
1. MD5
2. SHA1

http://dotnetpulse.blogspot.com/2007/12/sha1-hash-calculation-in-c.html

http://www.obviex.com/samples/hash.aspx

http://stackoverflow.com/questions/1454747/how-to-decrypt-md5-or-sha1-is-it-possible

Encryption
Encryption is 2 way and can be decrypted.
Encryption method:
1. TripleDES
2. Rijndael

Rainbow Table
http://en.wikipedia.org/wiki/Rainbow_table

Salt
http://en.wikipedia.org/wiki/Salt_%28cryptography%29

How to Run a Meeting Like Google

http://www.businessweek.com/smallbiz/content/sep2006/sb20060927_259688.htm

Inside Google's New-Product Process
http://www.businessweek.com/technology/content/jun2006/tc20060629_411177.htm