protected void btnLogin_Click(object sender, EventArgs e)
{
Application.Lock();
int P_int_num; //在线人数
string P_str_name; //登录用户
string P_str_names; //已在线的用户名
string[] P_str_user; //用户在线数组
P_int_num = int.Parse(Application["userNum"].ToString());
if (TextBox1.Text == "")
{
Response.Write("<script>alert('用户名不能为空')</script>");
TextBox1.Focus();
}
else
{
P_str_name = TextBox1.Text.Trim();
P_str_names = Application["user"].ToString();
P_str_user = P_str_names.Split(',');
for (int i = 0; i <= P_int_num - 1; i++)
{
if (P_str_name == P_str_user[i].Trim())
{
int P_int_judge = 1;
Response.Redirect("Login.aspx?value=" + P_int_judge);
}
}
if (P_int_num == 0)
{
Application["user"] = P_str_name.ToString();
}
else
{
Application["user"] = Application["user"] + "," + P_str_name.ToString();
}
P_int_num += 1;
Application["userNum"] = P_int_num;
Session["userName"] = TextBox1.Text.Trim();
Application.UnLock();
Response.Redirect("Default.aspx");
}
}
protected void Button1_Click(object sender, EventArgs e)
{
string strsql_query = "";
if (IDBox.Text != string.Empty && passwdBox.Text != string.Empty)
{
string ID2 = IDBox.Text.Trim().ToString();
string passwd = passwdBox.Text.Trim().ToString();
string strcon = "Data Source=(local);Initial Catalog=课设;Integrated Security=True";
SqlConnection conn = new SqlConnection(strcon);
conn.Open();
if (stuButton.Checked)
{
strsql_query = string.Format("select * from Tb_SLogin where Sno='{0}' and Spassword='******'", ID2, passwd);
}
else if (adminButton.Checked)
{
strsql_query = string.Format("select * from Tb_Admin where id='{0}' and Password='******'", ID2, passwd);
}
SqlCommand cmd_query = new SqlCommand(strsql_query, conn);
SqlDataReader dr = cmd_query.ExecuteReader();
if (dr.HasRows)
{
dr.Read();
if (stuButton.Checked)
{
Login.name = dr["Sname"].ToString();
welcome = "欢迎 " + name + " 同学登录本系统";
Session["name"] = name;
}
else if (adminButton.Checked)
{
Login.name = dr["id"].ToString();
}
dr.Close();
if (stuButton.Checked)
{
Session["pass"] = passwd;
Session["IDnew"] = ID2;
Response.Write(welcome);
// MessageBox.Show(welcome);
Application.Lock();
int P_int_num; //在线人数
string P_str_name; //登录用户
string P_str_names; //已在线的用户名
string[] P_str_user; //用户在线数组
P_int_num = int.Parse(Application["userNum"].ToString());
P_str_name = IDBox.Text.Trim();
P_str_names = Application["user"].ToString();
P_str_user = P_str_names.Split(',');
for (int i = 0; i <= P_int_num - 1; i++)
{
if (P_str_name == P_str_user[i].Trim())
{
int P_int_judge = 1;
Response.Redirect("Login.aspx?value=" + P_int_judge);
}
}
if (P_int_num == 0)
{
Application["user"] = P_str_name.ToString();
}
else
{
Application["user"] = Application["user"] + "," + P_str_name.ToString();
}
P_int_num += 1;
Application["userNum"] = P_int_num;
Session["userName"] = IDBox.Text.Trim();
Application.UnLock();
Response.Redirect("StudentPage.aspx");
}
else
{
//adminPage main = new adminPage();
// main.Show();
Response.Redirect("AdminPage.aspx");
}
Visible = false;
}
else
{
Response.Write("<script>alert('用户名或密码错误')</script>");
// MessageBox.Show("用户名或密码错误！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
passwdBox.Focus();
}
}
else
{
Response.Write("<script>alert('用户名或密码不能为空')</script>");
//MessageBox.Show("用户名或密码不能为空！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}