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Description: Create Instance System.Diagnostics.Process using new for processname Variable, Define string for cmd line like you type in runbox, use System.Diagnostics.Process.Start arg1 open command win, arg2 is string where /c runs & term win & SAVEpath-filename ext

Link: http://www.codekeep.net/snippets/422f7760-90f0-44e5-b51e-83cc7be7ac51.aspx

System.Diagnostics.Process process1;
process1 = new System.Diagnostics.Process();
//Do not receive an event when the process exits.
process1.EnableRaisingEvents = false;

//regTest file ExtenderProvidedPropertyAttribute works in Region, txt, rtf
//The "/C" Tells Windows to Run The Command then Terminate
string strCmdLine;
strCmdLine = "/C regedit.exe /e C:\\Users\\JohnnyL\\Desktop\\RegTest1.rtf"; 

System.Diagnostics.Process.Start("CMD.exe", strCmdLine);
process1.WaitForExit();
process1.Close();

Description: Uruchomienie aplikacji zwiazanej z plikiem.

Link: http://www.codekeep.net/snippets/2a58fee6-3e13-4004-8163-98f080bcdbe9.aspx

System.Diagnostics.Process.Start(@"C:\Test.txt");

Description: Liest Datei ein

Link: http://www.codekeep.net/snippets/cca5268e-3422-42c4-9b65-0fada846faff.aspx

            var of = new OpenFileDialog();

            of.InitialDirectory = cbLaufwerke.Text;
            of.Filter = "all files (*.*)|*.*|txt files (*.txt)|*.txt|html files (*.htm,*.html)|*.htm;*.html";
            of.FilterIndex = 1;
            of.RestoreDirectory = true;

            if (of.ShowDialog() == DialogResult.OK)
            {
                txtBox2.Text = of.FileName;
            }

Description: Auslesen eines Cellenwertes aus einem DataGridView

Link: http://www.codekeep.net/snippets/5939aded-2dcf-4970-ba99-013d1e7f0daf.aspx

DataGridViewRow row = this.dataGridView3.CurrentRow;
string cell_text = row.Cells["KNOTEN"].Value.ToString();

Description: Com sample

Link: http://www.codekeep.net/snippets/e093be78-1d5a-4a46-ac6e-64de6d2557aa.aspx

   Type objTypeWord = Type.GetTypeFromProgID("Word.Application");

            object objWord = Activator.CreateInstance(objTypeWord);

            objTypeWord.InvokeMember("Visible", System.Reflection.BindingFlags.Default | System.Reflection.BindingFlags.SetProperty ,
                                    null,
                                    objWord,
                                    new object [] {true });

Description: Check credentials for a given user

Link: http://www.codekeep.net/snippets/fa68958b-157d-4a94-9cbb-2217a7c569cb.aspx

/// <summary>
		/// Check credentials when blog user signs in
		/// </summary>
		/// <param name="username">Username</param>
		/// <param name="password">Password</param>
		/// <returns>Boolean value</returns>
		public static bool checkCredentials(string username, string password)
		{
			string strSQL = "SELECT password,salt FROM tblUsers WHERE username=@username";

			SqlConnection objConn = new SqlConnection(connString);
			SqlCommand objCmd = new SqlCommand(strSQL, objConn);

			objCmd.Parameters.AddWithValue("@username", username);

			string storedPassword = string.Empty;
			string salt = string.Empty;
			string givenPassword = string.Empty;
			bool flag = false;

			try
			{
				objConn.Open();
				SqlDataReader sdr = objCmd.ExecuteReader();

				if (!sdr.Read())
				{
					flag = false;
				}
				else
				{
					storedPassword = (string)sdr["password"];
					salt = (string)sdr["salt"];
					givenPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(salt + password, "SHA1");
					flag = (storedPassword == givenPassword);
				}
			}
			catch { }
			finally
			{
				objConn.Close();
			}

			return flag;
		}

Description: Check if email is in correct format

Link: http://www.codekeep.net/snippets/ec8b378f-1b7c-4dfe-9366-13f3da8d97c4.aspx

/// <summary>
		/// Check if email is in correct format
		/// </summary>
		/// <param name="email"></param>
		/// <returns>True if email is correct, false if not</returns>
		public static bool CheckEmail(string email)
		{
			string strRegex = @"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}" +
			                  @"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\" +
			                  @".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";
			//string strRegex = @"^(([^<>()[\]\\.,;:\s@\""]+"
			//                    + @"(\.[^<>()[\]\\.,;:\s@\""]+)*)|(\"".+\""))@"
			//                    + @"((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}"
			//                    + @"\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+"
			//                    + @"[a-zA-Z]{2,}))$";

			Regex re = new Regex(strRegex);
			return re.IsMatch(email);
		}

Description: How to create ISO DateTime to CAML query

Link: http://www.codekeep.net/snippets/8a5b1c8c-8ef2-4a50-89e6-90c29ae1978b.aspx

SPUtility.CreateISO8601DateTimeFromSystemDateTime(DateTime.Now.ToUniversalTime());

Description: using SortedList

Link: http://www.codekeep.net/snippets/3f932a1a-8ee0-4f72-8a3e-37a2ced5c622.aspx

SortedList<int, string> myList = new SortedList<int, string>();

myList.Add(1, "one");
myList.Add(3, "three");
myList.Add(4, "four");
myList.Add(2, "two");

foreach (int myKey in myList.Keys)
{
    Console.WriteLine("myKey = " + myKey);
}

Description: Forms Authentication

Link: http://www.codekeep.net/snippets/7a4ad0da-08a5-46ca-8077-7a8e2713514a.aspx

protected void btnLogin_Click(object sender, EventArgs e)
    {
        AdminUser objAdminUser = new AdminUser();
        objAdminUser.UserName =txtUserName.Text.Trim();
        objAdminUser.Password = txtPassword.Text.Trim();
        if (objAdminUser.AdminLoginUserValidate() != -100)
        {
            if (objAdminUser.UserID > 0)
            {
                // Create the authentication ticket
                FormsAuthenticationTicket authTicket = new FormsAuthenticationTicket(1,
                    objAdminUser.UserID.ToString(),  // user id
                    DateTime.Now,               // creation
                    DateTime.Now.AddMinutes(60),// Expiration
                    false,						// Persistent
                    objAdminUser.UserName + "," + objAdminUser.FirstName);	// UserName and Fill Name
                // Encrypt the ticket.
                string encryptedTicket = FormsAuthentication.Encrypt(authTicket);
                // Create a cookie and add the encrypted ticket to the cookie as data.
                HttpCookie authCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);
                // Add the cookie to the outgoing cookies collection.
                Response.Cookies.Add(authCookie);
                //if there is a previous url to redirect them to
                FormsAuthentication.RedirectFromLoginPage(objAdminUser.UserID.ToString(), false);
                //if (Request.QueryString["ReturnUrl"] == null)
                //{
                //    Response.Redirect("Welcome.aspx");
                //}
                //else
                //{
                //    Response.Redirect(Request.QueryString["ReturnUrl"].ToString());
                //}
            }
        }
        else
        {
            lblMsg.Text = "Invalid username and password.";
            ModalPopupExtender2.Show();
        }
    }

In Web.congig 

<authentication mode="Forms">
			<forms name="SMGR" loginUrl="login.aspx"  defaultUrl="welcome.aspx" timeout="1" protection="All" path="/"/>
		</authentication>

Impliment in page:

bool IsAttribute = false;
    public void CheckAuthentication()
    {
        if (!Context.User.Identity.IsAuthenticated)
        {
            string strRedirectURL = Server.UrlEncode(Context.Request.ServerVariables["URL"]);
            Context.Response.Redirect("Login.aspx?ReturnUrl=" + strRedirectURL);
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        CheckAuthentication();

    }