private void Contabilidad_FormClosing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing && !showLogin)
{
DialogResult closeIt = MessageBox.Show(
"¿Está seguro que desea salir?",
"Salir",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question
);
if (closeIt == DialogResult.Yes)
{
System.Windows.Forms.Application.Exit();
}
else
{
e.Cancel = true;
}
}
else
{
instance = null;
showLogin = false;
}
}
public static Contabilidad getInstance()
{
if (instance == null)
{
instance = new Contabilidad();
}
return(instance);
}
private void button1_Click(object sender, EventArgs e)
{
String password = txtPassword.Text;
using (MD5 md5 = MD5.Create()) {
byte[] hash = Encoding.ASCII.GetBytes(password);
hash = md5.ComputeHash(hash);
StringBuilder sb = new StringBuilder();
foreach (var x in hash)
{
sb.Append(x.ToString("x2"));
}
password = sb.ToString();
}
var query = from em in entities.users
where (
em.username.Equals(txtUsername.Text) &&
em.password.Equals(password)
)
select em;
if (query.Count() == 1)
{
users user = query.First();
Contabilidad instance = Contabilidad.getInstance();
instance.setUser(new User
{
id = user.id,
name = user.name,
permission = user.permission
});
instance.Show();
resetFields();
this.Hide();
}
else
{
MessageBox.Show(
"Usuario y/o Contraseña incorrecta",
"Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error
);
}
}
private void btnDelete_Click(object sender, EventArgs e)
{
DataGridViewRow row = null;
if (dgvUsers.SelectedRows.Count == 1)
{
row = dgvUsers.SelectedRows[0];
}
else if (dgvUsers.SelectedCells.Count == 1)
{
int i = dgvUsers.SelectedCells[0].RowIndex;
row = dgvUsers.Rows[i];
}
else
{
MessageBox.Show(
"Debes seleccionar solo 1 usuario a eliminar",
"Información",
MessageBoxButtons.OK,
MessageBoxIcon.Information
);
}
if (row != null)
{
DialogResult deleteIt = MessageBox.Show(
"¿Estas seguro de eliminar este usuario?",
"Confirmar",
MessageBoxButtons.YesNoCancel,
MessageBoxIcon.Question
);
if (deleteIt != DialogResult.Yes)
{
return;
}
int id = Int32.Parse(row.Cells[0].Value.ToString());
users localUser = (from em in entities.users
where em.id == id
select em).First();
if (localUser == null)
{
MessageBox.Show(
"El Usuario seleccionado no existe",
"Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error
);
loadUsers("");
}
else
{
int adminTotal = entities.users.Count(el => el.permission == 1);
if (adminTotal == 1 && localUser.permission == 1)
{
MessageBox.Show(
"No puedes eliminar al único administrador",
"Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error
);
}
else
{
bool delete = true;
bool sameAsLogged = false;
if (localUser.id == Contabilidad.user.id)
{
delete = false;
sameAsLogged = true;
DialogResult response = MessageBox.Show(
"Estas a punto de eliminar tu usuario. Esta acción te expulsará del sistema\n\n¿Deseas continuar?",
"Confirmar",
MessageBoxButtons.YesNoCancel,
MessageBoxIcon.Question
);
if (response == DialogResult.Yes)
{
delete = true;
}
}
if (delete)
{
entities.users.Remove(localUser);
entities.SaveChanges();
MessageBox.Show(
"¡Usuario eliminado con éxito!",
"Información",
MessageBoxButtons.OK,
MessageBoxIcon.Information
);
if (sameAsLogged)
{
IniciarSesion.getInstance().Show();
Contabilidad.showLogin = true;
Contabilidad.getInstance().Close();
}
else
{
loadUsers("");
}
}
}
}
}
}
