private void butSign_Click(object sender, EventArgs e) { if ((this.txtUsername.Text.Trim().Length <= 0 && (this.txtPass.Text.Trim().Length <= 0 || this.txtPass.Text == "Password")) || (this.txtUsername.Text == "Username" && (this.txtPass.Text.Trim().Length <= 0 || this.txtPass.Text == "Password"))) { this.errLogin.SetError(this.txtUsername, "Please,input username!!!"); this.errLogin.SetError(this.txtPass, "Please,input password!!!"); } //this.errLogin.Clear(); else { if (NoteControl.SignIn(txtUsername.Text, txtPass.Text) == true) { Program.GeneralName = txtUsername.Text; Program.GeneralID = NoteControl.GetIdLogin(txtUsername.Text); Program.Tags = true; this.Dispose(); fmNote fm = new fmNote(); fm.ShowDialog(); } else { MessageBox.Show("Login failed"); } } }