private void btnBack_Click(object sender, EventArgs e)
{
frmTeacherMain frm = new frmTeacherMain(TeacherID);
frm.Show();
this.Hide();
}
private void btnTeacherLogin_Click(object sender, EventArgs e)
{
string pass = textBoxTeacherPass.Text;
int len = pass.Length;
SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\MyDB\MyDB.mdf;Integrated Security=True;Connect Timeout=30");
string query = "Select * from Teacher where ID='" + textBoxTeacherID.Text.Trim() + "' and Password ='******'";
SqlDataAdapter adapter = new SqlDataAdapter(query, con);
DataTable table = new DataTable();
adapter.Fill(table);
if (textBoxTeacherID.Text.Trim() == string.Empty)
{
MessageBox.Show("Teacher ID is Required ", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
textBoxTeacherID.Clear();
textBoxTeacherID.Focus();
}
else if (textBoxTeacherPass.Text.Trim() == string.Empty)
{
MessageBox.Show("Password is Required ", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
textBoxTeacherPass.Clear();
textBoxTeacherPass.Focus();
}
else if (len < 8)
{
MessageBox.Show("Password Must Be 8 Digit");
}
else if (table.Rows.Count == 1)
{
TeacherID = textBoxTeacherID.Text;
frmTeacherMain frm = new frmTeacherMain(TeacherID);
this.Hide();
frm.Show();
}
else
{
MessageBox.Show("Teacher ID or Password is Invalid ", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
