protected void btnLogin_Click(object sender, EventArgs e)
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
//create user object
Users objU = new Users();
//get salt for username
String username = txtUsername.Text;
objU = (from u in db.Users1
where u.Username == username select u).FirstOrDefault();
//username was found
if (objU != null){
String salt = objU.Salt;
//salt and hash text password
String password = txtPassword.Text;
String pass_and_salt = password + salt;
// Create a new instance of the hash crypto service provider.
HashAlgorithm hashAlg = new SHA256CryptoServiceProvider();
// Convert the data to hash to an array of Bytes.
byte[] bytValue = System.Text.Encoding.UTF8.GetBytes(pass_and_salt);
// Compute the Hash. This returns an array of Bytes.
byte[] bytHash = hashAlg.ComputeHash(bytValue);
// Optionally, represent the hash value as a base64-encoded string,
// For example, if you need to display the value or transmit it over a network.
string base64 = Convert.ToBase64String(bytHash);
//check if the password is correct
if (objU.Password == base64)
{
//store id in session object
Session["UserID"] = objU.UserID;
Session["UserName"] = objU.Firstname + " " + objU.Lastname;
//redirect to their comic page
Response.Redirect("comics.aspx");
}
else
{
lblError.Text = "Invalid Login";
}
}
else
{
lblError.Text = "Invalid Login";
}
}
}
protected void GetAuthors()
{
using (DefaultConnection db = new DefaultConnection())
{
var track = from t in db.Comics1
select t;
//bind to grid
grdAuthors.DataSource = track.ToList();
grdAuthors.DataBind();
}
}
protected void GetPublishers()
{
//get list of comics
using (DefaultConnection db = new DefaultConnection())
{
var track = from t in db.Comics1
select t;
//bind to the grid
grdPublishers.DataSource = track.ToList();
grdPublishers.DataBind();
}
}
protected void GetComics()
{
//list comics for user
using (DefaultConnection db = new DefaultConnection())
{
var track = from t in db.Comics1
select t;
//bind to grid
grdComics.DataSource = track.ToList();
grdComics.DataBind();
}
}
protected void GetComic()
{
//look up comic and fill
using (DefaultConnection db = new DefaultConnection())
{
Int32 ComicID = Convert.ToInt32(Request.QueryString["ComicID"]);
//look up comic
Comics trac = (from c in db.Comics1
where c.ComicID == ComicID
select c).FirstOrDefault();
txtTitle.Text = trac.Title;
txtAuthor.Text = trac.Author;
txtPublisher.Text = trac.Issue.ToString();
}
}
protected void grdComics_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//identify
Int32 ComicID = Convert.ToInt32(grdComics.DataKeys[e.RowIndex].Values["ComicID"]);
//connect
using (DefaultConnection db = new DefaultConnection())
{
Comics track = (from c in db.Comics1
where c.ComicID == ComicID
select c).FirstOrDefault();
//delete
db.Comics1.Remove(track);
db.SaveChanges();
//refresh grid
GetComics();
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
//connect
using (DefaultConnection db = new DefaultConnection())
{
Comics trac = new Comics();
Int32 ComicID = 0;
//check for url
if (!String.IsNullOrEmpty(Request.QueryString["ComicID"]))
{
//get id from url
ComicID = Convert.ToInt32(Request.QueryString["ComicID"]);
trac = (from c in db.Comics1
where c.ComicID == ComicID
select c).FirstOrDefault();
}
//fill properties
trac.Title = txtTitle.Text;
trac.Author = txtAuthor.Text;
trac.Publisher = txtPublisher.Text;
trac.Issue = Convert.ToInt32(txtIssue.Text);
//no id in the url
if (ComicID == 0)
{
db.Comics1.Add(trac);
}
//save
db.SaveChanges();
//redirect
Response.Redirect("tracker.aspx");
}
}
protected void btnRegister_Click(object sender, EventArgs e)
{
//connect to db
using (DefaultConnection db = new DefaultConnection())
{
//create new user
Users objU = new Users();
//fill the form inputs
objU.Firstname = txtFirstname.Text;
objU.Lastname = txtLastname.Text;
objU.Username = txtUsername.Text;
//salt and hash text password
String password = txtPassword.Text;
String salt = CreateSalt(8);
String pass_and_salt = password + salt;
// Create a new instance of the hash crypto service provider.
HashAlgorithm hashAlg = new SHA256CryptoServiceProvider();
// Convert the data to hash to an array of Bytes.
byte[] bytValue = System.Text.Encoding.UTF8.GetBytes(pass_and_salt);
// Compute the Hash. This returns an array of Bytes.
byte[] bytHash = hashAlg.ComputeHash(bytValue);
// Optionally, represent the hash value as a base64-encoded string,
// For example, if you need to display the value or transmit it over a network.
string base64 = Convert.ToBase64String(bytHash);
objU.Password = base64;
objU.Salt = salt;
//save
db.Users1.Add(objU);
db.SaveChanges();
}
}
