C#

Spring 2011

 

Hash password with MD5 - Kenneth

 

using System.Security.Cryptography 

 

// Declare variables to be passed and returned from encryption routine

           string stgOriginal = txtPassword.Text;

           string stgEncrypted;

 

// Perform hash routine and return encrypted password to be stored in stgEncrypted

            stgEncrypted = EncodePassword(stgOriginal);

 

public string EncodePassword(string originalPassword)

        {

            //Declarations

            Byte[] originalBytes;

            Byte[] encodedBytes;

            MD5 md5;

 

//Instantiate MD5CryptoServiceProvider, get bytes for original password and compute hash (encoded password)

            md5 = new MD5CryptoServiceProvider();

            originalBytes = ASCIIEncoding.Default.GetBytes(originalPassword);

            encodedBytes = md5.ComputeHash(originalBytes);

 

            //Convert encoded bytes back to a 'readable' string

            return BitConverter.ToString(encodedBytes);

        }

Spring 2010

 

Report video tutorial-Garrett

 

This website contains a video on how to create a report using the report viewer.

http://www.youtube.com/watch?v=ociTNFwKii0

 

How to pull created reports up into a window form.- Jared

 

For the example, just consider the report you made is called "CrystalReport1" and that it was a summary report.

 

1. Create a new windows form and name it Summary.  Next, add the Crystal Report Viewer to the form.  Finally, double click the title bar of the form and in the FormLoad place the following code:

 

        CrystalReport1 summaryReport = new CrystalReport1();

        crystalReportViewer1.ReportSource = summaryReport;

 

2. Then just place the following code behind your Summary Report button on your Report Menu:

 

        Summary aSummary = new Summary();

 

        aSummary.Show();

 

Two separate opening menus - Jared

 

Two separate opening menus without having to use a database for the customer or owner name / password. It also includes the coding for clearing out the name and password and resetting the focus with appropriate error messages if the entries are wrong.

  

            if (txtUser.Text == "owner" & txtPassword.Text == "1234")

            {

                this.Dispose(false);

 

                OwnerMenu aOwnerMenu = new OwnerMenu();

 

                aOwnerMenu.Show();

            }

            else if (txtUser.Text == "customer" & txtPassword.Text == "5678")

            {

                this.Dispose(false);

 

                CustomerMenu aCustomerMenu = new CustomerMenu();

 

                aCustomerMenu.Show();

            }

            else

            {

                MessageBox.Show("Sorry the user name or password was incorrect.", "Incorrect",

                    MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

                txtPassword.Clear();

                txtUser.Clear();

                txtUser.Focus();

            }

Moving the contents of a text box to the next form being opened.- Jared

 

  The text boxes on both forms must be named the same for this coding to work.

 

Under your click event for opening your second form the coding should read as follows:

 

{

      this.Dispose(false);

 

      SecondForm aSecondForm = new SecondForm(txtValue.Text);

 

      aSecondForm.Show();

}

 

In the code SecondForm is the name of the form to be opened and txtValue is the text box name.

  

On your second form the following code should be added under your variable declerations.

 

      txtPrice.Text = val;

Spring 2009

How to make it so you don’t have to change a path from computer to computer - Michael

Most of the time, when you move from one computer to another you have to change the path of where your jump drive is in your program. There is a couple lines of code that you can use to make that problem go away.  In my program I have everything in one folder and it is good to do this. Here is the path of my program F:\Senior Project\The Mulligan\ then my Website is under F:\Senior Project\.

      string Es = Path.GetDirectoryName(Application.ExecutablePath);

     string[] Column = Es.Split('\\');

     string Root = Column[0];

     string Sub = Column[1];

     string path = Root + @"\" + Sub + @"\" + @"\Website.htm";

 F: would be in the string Root and Senior Project would be in Sub.

You then just string it all together in the string Path. This code is only for if it is in one sub folder you would have to add more to it to make it if it is in another.

Multi user Log in form code from a SQL Database in C# - Michael

Code put in behind your login screen to pull the user name and password from a SQL database.

SqlConnection lgnConn = new SqlConnection(@"Data Source=uam-cis1\sqlexpress;Initial Catalog=Senior_Project_Howard;Integrated Security=SSPI");

            lgnConn.Open();

            SqlCommand cmd = new SqlCommand("SELECT pass_Password FROM Password WHERE pass_Emp_ID = " + txtUsername.Text ,lgnConn);

            SqlDataReader dr;

            try

            {

                dr = cmd.ExecuteReader();

                while (dr.Read())

                {

                    if (dr["pass_Password"].ToString() == txtPassword.Text)

                    {

                        Global.ClockinoutForm();

                        this.Close();

                    }

                    else

                    {

                        errorProvider1.SetError(txtPassword, "Password invalid");

                    }

                }

            }

            catch

            {

                errorProvider1.SetError(txtUsername, "Please Enter Username");

            }