private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
MessageBox.Show("用户名不能为空，请重试");
isok = 1;
textBox1.Focus();
}
else if (textBox2.Text == "")
{
MessageBox.Show("密码不能为空，请重试");
isok = 1;
textBox2.Focus();
}
else if (radioButton1.Checked != true && radioButton2.Checked != true && radioButton3.Checked != true)
{
MessageBox.Show("身份类型不能为空，请重试");
isok = 1;
}
try
{
conn = new SqlConnection(sql);
conn.Open();
//SqlDataAdapter da = new SqlDataAdapter(sql,conn);
//DataSet ds = new DataSet();
//da.Fill(ds);
//DataTable dt = ds.Tables[0];
if (radioButton1.Checked)
{
sql = string.Format("select * from Students where ID = '{0}'", textBox1.Text);
cmd = new SqlCommand(sql, conn);
SqlDataReader reader = cmd.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
string isPassword = (string)reader.GetValue(11);
if (textBox2.Text.Equals(isPassword))
{
id = (string)reader.GetValue(0);
password = (string)reader.GetValue(11);
Students frmstudent = new Students(id, password);
frmstudent.Show();
this.Hide();
}
else
{
MessageBox.Show("学生密码输入错误，请重试");
textBox2.Focus();
}
}
}
else
{
MessageBox.Show("不存在该学生账号");
}
reader.Close();
}
if (radioButton2.Checked)
{
sql = string.Format("select * from Teacher where ID = '{0}'", textBox1.Text);
cmd = new SqlCommand(sql, conn);
SqlDataReader reader1 = cmd.ExecuteReader();
if (reader1.HasRows)
{
while (reader1.Read())
{
string isPassword = (string)reader1.GetValue(11);
if (textBox2.Text.Equals(isPassword))
{
id = (string)reader1.GetValue(0);
password = (string)reader1.GetValue(11);
Teachers frmteacher = new Teachers(id);
frmteacher.Show();
this.Hide();
}
else
{
MessageBox.Show("教师密码输入错误，请重试");
}
}
}
else
{
MessageBox.Show("不存在该教师账号");
}
reader1.Close();
}
if (radioButton3.Checked)
{
if (textBox1.Text == "admin" && textBox2.Text == "123456")
{
guanliyuan from2 = new guanliyuan();
from2.Show();
this.Hide();
}
else
{
MessageBox.Show("用户名或密码输入错误，请重试");
}
}
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
}
}