public static bool isNonCharSpecialAndNonEmpty(string input, string aliases)
{
if (isEmpty(input, aliases))
{
return(false);
{
MessBox.MessError(string.Format("{0} cannot contain Specia character !!!", aliases));
}
if (!isNonCharSpecial(input))
{
return(false);
}
}
return(true);
}
public void UpdateQuestion()
{
if (RgEx.isEmpty(q_title))
{
MessBox.MessWarning("Chưa nhập câu hỏi !!"); return;
}
string query = string.Format("update questions set q_title = N'{0}',isImage = {1},explain ='{2}' where q_id = {3}",
q_title, isImage, explain, q_id);
ReturnClass.ExcuteNonQuery(query, ReturnClass.Status.update);
//for (int i = 0; i < options.Count; ++i)
foreach (var dt in options)
{
dt.id_Qus = dt.id_Qus ?? this.q_id;
dt.updateOption();
}
}
public static void Delete(int exId)
{
string query = string.Format("select count(q_id) from questions where q_fk_ex ={0}", exId);
if (!MessBox.MessWarning(" Confirm deleted " + ReturnClass.scalarReturn(query) + " questions"))
{
return;
}
//Process Delete Exams
query = string.Format("select q_id from questions where q_fk_ex ={0}", exId);
using (SqlDataReader reader = ReturnClass.readerReturn(query))
{
while (reader.Read())
{
Questions.DeleteQuestion(reader.GetInt32(0));
}
}
}
private void btnLogin_Click(object sender, EventArgs e)
{
string user = txtUsername.Text;
string pass = txtPassword.Text;
if (user.Equals("Username") || pass.Equals("Password"))
{
MessBox.MessError("Username or Password is Empty !!"); return;
}
if (!RgEx.isAlphanumericNotSpace(user, "Username"))
{
return;
}
if (!RgEx.isAlphanumericNotSpace(pass, "Password"))
{
return;
}
//MessBox.MessInf(isAd);
string query = string.Format("select isAd from admin_athu where ad_user='******' and ad_password='******'", user, pass);
string isAd = ReturnClass.scalarReturn(query);
//Check invalid User or password
if (isAd.Equals(""))
{
MessBox.MessError("Invalid Input User or Password"); return;
}
//Hide old form login and show form Admin or Students
try
{
this.Hide();
if (isAd.Equals("True"))
{
username = user;
formAdmin.ShowDialog();
}
else
{
formStudents.ShowDialog();
}
this.Show();
}catch
{
}
}
public bool setQuestions(int numQues, int exId, int timePer)
{
string query = string.Format("select count(q_id) from questions where q_fk_ex ={0}", exId);
string IdQuestions = ReturnClass.scalarReturn(query);
if (string.IsNullOrEmpty(IdQuestions) || int.Parse(IdQuestions) < numQues)
{
MessBox.Warning("Num Question or Name Exams invalid "); return(false);
}
this.numQues = numQues;
this.exId = exId;
this.timePer = timePer;
optionMix.Clear();
check.Clear();
RandomNumberQs();
InitRandomChoice();
currentIndex = -1;
return(true);
}
public static bool ExcuteNonQuery(string query)
{
bool Result = false;
try
{
//Query Execution
if (sqlConnection.State == ConnectionState.Closed)
{
sqlConnection.Open();
}
SqlCommand command = new SqlCommand(query, sqlConnection);
Result = command.ExecuteNonQuery() == 0 ? false : true;
}
catch (Exception ex)
{
MessBox.MessError(ex.Message);
}
return(Result);
}
public static string scalarReturn(string q)
{
string s = "";
//Query Execution
if (sqlConnection.State == ConnectionState.Closed)
{
sqlConnection.Open();
}
try
{
SqlCommand sqlCommand = new SqlCommand(q, sqlConnection);
object ob = sqlCommand.ExecuteScalar();
if (ob != null)
{
s = ob.ToString();
}
}
catch (Exception ex) {
MessBox.MessError(ex.Message);
}
sqlConnection.Close();
return(s);
}
