C# Validation Codes

Email Validation Code

private void button1_Click(object sender, EventArgs e)
        {
            String ID = txtID.Text;

            if ((ID.Count(char.IsDigit) == 9) && (ID.EndsWith("X") || ID.EndsWith("V")) && (ID[2] != '4' && ID[2] != '9'))
            {
                MessageBox.Show("Valid ID");
            }
            else
            {
                MessageBox.Show("Invalid ID");
            }
      }

NIC Validation Code

private void button1_Click(object sender, EventArgs e)
{
string pattern = null;pattern = "^([0-9a-zA-Z]([-\\.\\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\\w]*[0-9a-zA-Z]\\.)+[a-zA-Z]{2,9})$";

            if (Regex.IsMatch(txtEmail.Text, pattern))
            {
                MessageBox.Show("Valid Email address ");
            }
            else
            {
                MessageBox.Show("Not a valid Email address ");
            }
}

BCS Management Information Systems(MIS) Recommended Book Download Here

Download Link:- Terry Lucey, Management Information Systems, Ninth Edition, 2005, Thompson.

Creating Database Driven Login Form Using C# & MySQL

Codes


namespace MyProject

{
    public partial class frmMyLogin : Form
    {
        public frmMyLogin()
        {
            InitializeComponent();
        }

        MySqlConnection con = new MySqlConnection(@"server=localhost;user id=root;database=employee");
        MySqlDataAdapter da = new MySqlDataAdapter();
        MySqlCommand cmd = new MySqlCommand();

        private void btnLogin_Click(object sender, EventArgs e)
        {
            con.Open();
            string Username = txtUsername.Text;
            string Password = txtPassword.Text;

            MySqlCommand cmd = new MySqlCommand("Select UserName,Password from login where UserName='"+txtUsername.Text+"'and Password='"+txtPassword.Text+"'",con);

            MySqlDataAdapter da = new MySqlDataAdapter(cmd);
            DataTable dt = new DataTable();
            da.Fill(dt);

            if (dt.Rows.Count > 0)
            {
                MessageBox.Show("Login Sucessfull");
                frmMain mymain = new frmMain();
                mymain.Show();
                this.Hide();
            }

            else
            {
                MessageBox.Show("Invalid UserName or Password");
            }
            con.Close();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            DialogResult s = MessageBox.Show("Are you sure do you want to exit", "Exit", MessageBoxButtons.YesNo, MessageBoxIcon.Question);

            if (s == DialogResult.Yes)
            {
                Application.Exit();
            }
        }

        private void btnNewUser_Click(object sender, EventArgs e)
        {       
            string cmdText = "INSERT INTO login(UserName,Password) VALUES (@UserName, @Password)";
            con.Open();
            MySqlCommand cmd = new MySqlCommand(cmdText, con);
            cmd.Parameters.AddWithValue("@UserName", txtUsername.Text);
            cmd.Parameters.AddWithValue("@Password", txtPassword.Text);
           cmd.ExecuteNonQuery();
            MessageBox.Show("Create new user is successful");
            con.Close();
        }
    }
}
 

------------

By Thissa 

----------------

M# - The .NET Language

M# ("M sharp") is an implementation of the M programming language based on Microsoft's Dynamic Language Runtime (DLR). Other M implementations include Matlab, Octave and SciLab. Extreme Numerical Optimization .NET libraries used as underlying computational kernel.

Because M # is a .NET language, the direct use of the extensive collection of species and libraries can make available for the .NET framework. In particular, in contrast to other implementations of the M language, M # can advanced numerical types such as arbitrary precision integers, using rational numbers and floating-point numbers.

For more see this article:- extremeoptimization.com

Performance

M # uses the same technology as Microsoft two dynamic language Iron Python and Iron Ruby, to measure the best balance of flexibility and speed. The numerical horsepower provided by the Extreme Optimization Numerical Libraries for .NET. This M # can compete around the fastest implementations and significantly outperforms open source implementations.

Official Web site:- msharp.co.uk

References

Why M#? 

Undestanding M#

Web application framework (WAF)

A web application framework (WAF) is a software framework that is designed to support the development of dynamic websites, web applications, web services and web resources. The framework is intended to alleviate the overhead associated with common activities carried out in web development. For example, many libraries provide frameworks to access the database, templating frameworks and session management, and they often promote code reuse.

Types of framework architectures

Model–view–controller (MVC)

Many frames will follow the MVC architectural pattern to separate the data model with business rules from the user interface. This is generally considered good practice modularizes code promotes code reuse and multiple interfaces can be used. In Web applications, this makes presented different views, such as web pages for humans, and web service interfaces for external applications.

Push-based vs. pull-based

Most MVC frameworks follows a push -based architecture also called " action -based " . These frameworks use actions do the required processing , and then "push" the data to the display layer to the results. Django Ruby on Rails, Symfony , Spring MVC, Stripes , CodeIgniter are good examples of this architecture An alternative is pull - based architecture , sometimes called " component-based " these cadres layers begin with vision, who can then " pull "the results of multiple controllers as needed In this architecture , multiple controllers can be involved in one view Elevator , Tapestry , JBoss Seam, Java Server Faces ( μ ) Micro and Wicket are examples of pull - . based architectures Play . Struts, RIFE and ZK have support for both push and pull -based application controller calls.

Three-tier organization

In three -tier organization, applications are structured around three physical layers. Client application and database The database is normally a RDBMS. The application contains the business logic that runs on a server and communicates with the client using HTTP. [11] The client web applications is a Web browser that supports HTML is generated by the application layer. The term should not be confused with MVC , which , unlike the three - tier architecture , it is regarded as a good practice to keep business logic of the controller , the " middle layer " .

Books

Java Frameworks and Components: Accelerate Your Web Application Development

By Michael Nash

Python Web Application Frameworks: Cherrypy, Django (Web Framework), Flask (Programming), Grok (Web Framework), Nagare (Web Framework), Nevow, Pylons

 
Developing Application Frameworks in .NET

Web Application Security Fundamentals

Haml (HTML Abstraction Markup Language)

Haml (HTML Abstraction Markup Language) is a lightweight markup language used to the XHTML or any web document is to describe without the use of conventional inline coding. It was designed to be a lot of shortcomings in the traditional templating engines and markings make as elegant as it may be to address.

Haml functions as a replacement for the inline page templating systems PHP, ASP and RHTML. However Avoids Haml the need explicitly coding XHTML into the template, because they with some code to generate even a description of the XHTML, dynamic content. Haml’s equivalent for CSS Sass.

Haml official site:-http://haml.info