private void Login_Click(object sender, EventArgs e)
{
string userName = LoginUserName.Text;
string password = LoginPassword.Text;
try
{
if (Type.Text == "" || Type.Text == null)
{
MessageBox.Show("请选择用户身份");
}
else if (LoginUserName.Text == "" || LoginUserName.Text == null || LoginPassword.Text == "" || LoginPassword.Text == "")
{
MessageBox.Show("请输入正确的用户名和密码");
}
else if (Type.Text == "管理员")
{
string SelectSQL = "select * from admin where UserName=N'" + userName + "'";
DataSet ds = SqlHelper.ExecuteDataset(conn, CommandType.Text, SelectSQL);
if (ds.Tables[0].Rows.Count > 0)
{
//该用户名存在，从数据中获取保存的加盐哈希值，赋值给变量goodhash
string goodhash = ds.Tables[0].Rows[0]["Password"].ToString();
//判断用户输入的密码是否匹配
if (PasswordSecurity.PasswordStorage.VerifyPassword(password, goodhash))
{
f9 = new Form9();
f9.Show();
this.Hide();
}
else
{
LoginUserName.Clear();
LoginPassword.Clear();
MessageBox.Show("如果不是管理员，请离开");
}
}
else
{
LoginUserName.Clear();
LoginPassword.Clear();
MessageBox.Show("如果不是管理员，请离开");
}
}
else if (Type.Text == "教师")
{
string SelectSQL = "select * from teacher where UserName=N'" + userName + "'";
DataSet ds = SqlHelper.ExecuteDataset(conn, CommandType.Text, SelectSQL);
if (ds.Tables[0].Rows.Count > 0)
{
//该用户名存在，从数据中获取保存的加盐哈希值，赋值给变量goodhash
string goodhash = ds.Tables[0].Rows[0]["Password"].ToString();
//判断用户输入的密码是否匹配
if (PasswordSecurity.PasswordStorage.VerifyPassword(password, goodhash))
{
f3 = new Form3();
f3.Show();
this.Hide();
}
else
{
LoginUserName.Clear();
LoginPassword.Clear();
MessageBox.Show("如果不是老师，请选择正确的身份登录");
}
}
else
{
LoginUserName.Clear();
LoginPassword.Clear();
MessageBox.Show("如果不是老师，请选择正确的身份登录");
}
}
else if (Type.Text == "学生")
{
string SelectSQL = "select * from StdInfo where UserName=N'" + userName + "'";
DataSet ds = SqlHelper.ExecuteDataset(conn, CommandType.Text, SelectSQL);
if (ds.Tables[0].Rows.Count > 0)
{
string goodhash = ds.Tables[0].Rows[0]["Password"].ToString();
if (PasswordSecurity.PasswordStorage.VerifyPassword(password, goodhash))
{
f2 = new Form2();
f2.Show();
this.Hide();
}
else
{
LoginUserName.Clear();
LoginPassword.Clear();
MessageBox.Show("用户名或密码错误");
}
}
else
{
LoginUserName.Clear();
LoginPassword.Clear();
MessageBox.Show("用户名或密码错误");
}
}
else
{
MessageBox.Show("用户名或密码错误或身份不匹配");
}
}
catch
{
MessageBox.Show("用户名或密码输入错误");
}
}
