private void btntrolai_Click(object sender, EventArgs e) { this.Hide(); Frmquanlysv frm = new Frmquanlysv(); frm.Show(); }
private void btnlogin_Click(object sender, EventArgs e) { SqlConnection cn = new SqlConnection(@"Data source= .\SQLEXPRESS; Initial Catalog = Quanlysinhvien; Trusted_Connection = yes"); SqlDataAdapter da = new SqlDataAdapter("select count (*) From Login where USENAME = '" + txtname.Text + "' and PASSWORD = '******'", cn); DataTable dt = new DataTable(); da.Fill(dt); if (dt.Rows[0][0].ToString() == "1") { this.Hide(); Frmquanlysv frm = new Frmquanlysv(); frm.Show(); } else { MessageBox.Show(" Please check you use nam and password", "Errors", MessageBoxButtons.OK, MessageBoxIcon.Error); } }