private void button1_Click(object sender, EventArgs e)
{
if (t_id.Text == "")
{
t_id.BackColor = Color.Red;
MessageBox.Show("Teacher ID field must be filled!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
t_id.Focus();
return;
}
if (new_un.Text == "")
{
new_un.BackColor = Color.Red;
MessageBox.Show("Please Enter User Name!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
new_un.Focus();
return;
}
if (confirm_un.Text == "")
{
confirm_un.BackColor = Color.Red;
MessageBox.Show("Please Fill Confirm User Name Field!", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
confirm_un.Focus();
return;
}
if (t_id.Text != "" && new_un.Text != "" && confirm_un.Text != "")
{
try
{
if (state.Teacher_login_id == Convert.ToInt32(t_id.Text))
{
if (new_un.Text == confirm_un.Text)
{
state.con.Open();
string qry = "update teacher set user_name='" + new_un.Text + "'where teacher_id='" + Convert.ToInt32(t_id.Text) + "'";
SqlCommand cmd = new SqlCommand(qry, state.con);
cmd.ExecuteNonQuery();
state.con.Close();
t_id.Text = "";
new_un.Text = "";
confirm_un.Text = "";
MessageBox.Show("User Name Changed successfully!", "User Name Changed", MessageBoxButtons.OK, MessageBoxIcon.Information);
teacher_view tp = new teacher_view();
this.Hide();
tp.Show();
}
else
{
MessageBox.Show("User Name not matched.");
}
}
else
{
MessageBox.Show("Teacher ID Incorrect.");
}
}
catch (SqlException ex)
{
MessageBox.Show(ex.Message);
}
}
}
private void button3_Click(object sender, EventArgs e)
{
teacher_view tp = new teacher_view();
this.Hide();
tp.Show();
}
