// ユーザーログイン時、パスワードとログイン状態の確認（２重ログインの防止）
private void btnLogIn_Click(object sender, EventArgs e)
{
if (btnLogIn.Text == "Log In")
{
TfSQL tf = new TfSQL();
string logt = tf.sqlExecuteScalarString("select login_times from qc_user where qcuser = '******'");
if (logt == "0")
{
grLogin.Text = "Change Default Password";
lblUser.Text = "New Password";
txtPwd.Size = new Size(100, 20);
txtPwd.Location = new Point(123, 47);
lblPass.Text = "Confirm Password";
txtPassword.Size = new Size(100, 20);
txtPassword.Location = new Point(123, 87);
btnLogIn.Text = "Change Password";
btnLogIn.Enabled = false;
txtPassword.ResetText();
txtPwd.ResetText();
txtPwd.Visible = true;
txtPwd.Focus();
cmbUserName.Visible = false;
btnChangePass.Visible = false;
}
else
{
string sql = null;
string user = null;
string pass = null;
string ip = null;
bool login = false;
user = cmbUserName.Text;
if (user != null)
{
sql = "select pass FROM qc_user WHERE qcuser='******'";
pass = tf.sqlExecuteScalarString(sql);
sql = "select loginstatus FROM qc_user WHERE qcuser='******'";
login = tf.sqlExecuteScalarBool(sql);
sql = "select ip_address from qc_user where qcuser = '******'";
ip = tf.sqlExecuteScalarString(sql);
GetMD5(txtPassword.Text);
if (pass == str_md5)
{
if (login && ip != "null" && ip != lblIP.Text)
{
DialogResult reply = MessageBox.Show("This user account is currently used by " + ip + "," + System.Environment.NewLine +
"or the log out last time had a problem.", "Notice", MessageBoxButtons.OK, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);
sql = "UPDATE qc_user SET loginstatus=false, ip_address = '" + lblIP.Text + "' WHERE qcuser='******'";
bool res1 = tf.sqlExecuteNonQuery(sql, false);
return;
}
//Check IP Address
if (ip == "null")
{
tf.sqlExecuteScalarString("UPDATE qc_user SET ip_address = '" + lblIP.Text + "' where qcuser = '******'");
}
// ログイン状態をＴＲＵＥへ変更
sql = "UPDATE qc_user SET loginstatus=true WHERE qcuser='******'";
bool res = tf.sqlExecuteNonQuery(sql, false);
// 子フォームForm1を表示し、デレゲートイベントを追加：
frmItem f1 = new frmItem();
f1.RefreshEvent += delegate(object sndr, EventArgs excp)
{
// Form1を閉じる際、ログイン状態をＦＡＬＳＥへ変更し、当フォームForm5も閉じる
sql = "UPDATE qc_user SET loginstatus=false, ip_address = 'null' WHERE qcuser='******'";
res = tf.sqlExecuteNonQuery(sql, false);
this.Visible = true;
txtPassword.ResetText();
};
f1.updateControls(user, lblIP.Text);
f1.Show();
this.Visible = false;
}
else if (pass != txtPassword.Text)
{
MessageBox.Show("Password does not match", "Notice", MessageBoxButtons.OK, MessageBoxIcon.Warning);
txtPassword.ResetText();
}
}
}
}
else
{
if (txtPwd.Text != txtPassword.Text)
{
lblStatus.Text = "Password is not avaliable!";
lblStatus.ForeColor = Color.Red;
}
else
{
string pass = txtPwd.Text;
GetMD5(pass);
TfSQL up = new TfSQL();
up.sqlExecuteScalarString("update qc_user set pass = '******' where qcuser = '******'");
up.sqlExecuteScalarString("update qc_user set login_times = '1' where qcuser = '******'");
btnLogIn.Text = "Log In";
lblUser.Text = "Username:"******"Password:"******"Your password has been changed!", "Notice", MessageBoxButtons.OK, MessageBoxIcon.Information);
if (result == DialogResult.OK)
{
login();
}
}
}
}
private void login()
{
string sql = null;
string user = null;
string pass = null;
string ip = null;
bool login = false;
user = cmbUserName.Text;
if (user != null)
{
TfSQL tf = new TfSQL();
sql = "select pass FROM qc_user WHERE qcuser='******'";
pass = tf.sqlExecuteScalarString(sql);
sql = "select loginstatus FROM qc_user WHERE qcuser='******'";
login = tf.sqlExecuteScalarBool(sql);
sql = "select ip_address from qc_user where qcuser = '******'";
ip = tf.sqlExecuteScalarString(sql);
//Check IP Address
if (ip == "null")
{
tf.sqlExecuteScalarString("UPDATE qc_user SET ip_address = '" + lblIP.Text + "'");
}
GetMD5(txtPassword.Text);
if (pass == str_md5)
{
if (login && ip != "null" && ip != lblIP.Text)
{
DialogResult reply = MessageBox.Show("This user account is currently used by " + ip + "," + System.Environment.NewLine +
"or the log out last time had a problem.", "Notice", MessageBoxButtons.OK, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);
return;
}
// ログイン状態をＴＲＵＥへ変更
sql = "UPDATE qc_user SET loginstatus=true WHERE qcuser='******'";
bool res = tf.sqlExecuteNonQuery(sql, false);
// 子フォームForm1を表示し、デレゲートイベントを追加：
frmItem f1 = new frmItem();
f1.RefreshEvent += delegate(object sndr, EventArgs excp)
{
// Form1を閉じる際、ログイン状態をＦＡＬＳＥへ変更し、当フォームForm5も閉じる
sql = "UPDATE qc_user SET loginstatus=false, ip_address = 'null' WHERE qcuser='******'";
res = tf.sqlExecuteNonQuery(sql, false);
this.Visible = true;
txtPassword.ResetText();
};
f1.updateControls(user, lblIP.Text);
f1.Show();
this.Visible = false;
}
else if (pass != txtPassword.Text)
{
MessageBox.Show("Password does not match", "Notice", MessageBoxButtons.OK, MessageBoxIcon.Warning);
txtPassword.ResetText();
}
}
}