private void button1_Click(object sender, EventArgs e) { string str1 = comboBox2.Text; string str2 = textBox1.Text; string str3 = textBox2.Text; SqlConnection cn = new SqlConnection(); cn.ConnectionString = "server=.;database=ss;uid=sa;pwd=chq;"; string sql = "select * from teacher;"; cn.Open(); SqlCommand cmd = new SqlCommand(); cmd.CommandText = sql; cmd.Connection = cn; SqlDataReader sdr = cmd.ExecuteReader(); while (sdr.Read()) { if (sdr.HasRows != false) { 教师评分界面 form = new 教师评分界面(); form.Show(); this.Visible = false; } else { MessageBox.Show("密码错误,请重新输入!!"); } } cn.Close(); }
private void button1_Click(object sender, EventArgs e) { string str1 = comboBox2.Text; string str2 = textBox1.Text; string str3 = textBox2.Text; SqlConnection cn = new SqlConnection(); cn.ConnectionString = "server=.;database=ss;uid=sa;pwd=chq;"; string sql = "select * from teacher;"; cn.Open(); SqlCommand cmd = new SqlCommand(); cmd.CommandText = sql; cmd.Connection = cn; SqlDataReader sdr = cmd.ExecuteReader(); while (sdr.Read()) { if (sdr.HasRows != false) { 教师评分界面 form = new 教师评分界面(); form.Show(); this.Visible = false; } else MessageBox.Show("密码错误,请重新输入!!"); } cn.Close(); }