public static bool UpdatePassword(string newPassword, int studentId)
{
bool success = false;
SqlConnection connection = MathWizzDB.GetConnection();
string command = ("UPDATE Users " +
"SET Password = @newPassword " +
"WHERE UserId = @studentId");
SqlCommand updateCommand = new SqlCommand(command, connection);
updateCommand.Parameters.AddWithValue("@studentId", studentId);
updateCommand.Parameters.AddWithValue("@newPassword", newPassword);
try
{
connection.Open();
int rowAffected = updateCommand.ExecuteNonQuery();
success = true;
return(success);
}
catch (SqlException ex)
{
throw ex;
}
finally
{
connection.Close();
}
return(success);
}
public static bool AssignClassToStudent(Student student, int classId)
{
bool success = false;
SqlConnection connection = MathWizzDB.GetConnection();
SqlCommand command = new SqlCommand("INSERT INTO StudentInfo(ClassId) " +
"VALUES('@ClassId') " +
"WHERE StudentId = @StudentId");
command.Parameters.AddWithValue("@ClassId", classId);
try
{
command.Connection.Open();
command.ExecuteNonQuery();
}
catch (SqlException ex)
{
throw ex;
}
finally
{
command.Connection.Close();
}
return(success);
}
public static bool GivePointsToStudent(Student student, int rewardPoints)
{
bool success = false;
SqlConnection connection = MathWizzDB.GetConnection();
SqlCommand command = new SqlCommand("INSERT INTO StudentInfo(RewardPoints) " +
"VALUES(@RewardPoints) " +
"WHERE StudentId = @StudentId");
command.Parameters.AddWithValue("@RewardPoints", rewardPoints);
try
{
command.Connection.Open();
command.ExecuteNonQuery();
}
catch (SqlException ex)
{
throw ex;
}
finally
{
command.Connection.Close();
}
return(success);
}
public static Student GetStudentInfo(int studentId)
{
SqlConnection connection = MathWizzDB.GetConnection();
string selectStatement = " SELECT UserId " +
", FirstName, LastName, UserName, Password, UserRole,SkillLevel, ClassId FROM Users JOIN StudentInfo ON Users.UserId = StudentInfo.StudentId " +
" WHERE (UserId = @studentId)";
SqlCommand selectCommand = new SqlCommand(selectStatement, connection);
selectCommand.Parameters.AddWithValue("@studentId", studentId);
try
{
connection.Open();
SqlDataReader studentReader = selectCommand.ExecuteReader(System.Data.CommandBehavior.SingleRow);
if (studentReader.HasRows)
{
if (studentReader.Read())
{
Student student = new Student();
student.firstName = studentReader["FirstName"].ToString();
student.lastName = studentReader["LastName"].ToString();
student.username = studentReader["UserName"].ToString();
student.password = studentReader["Password"].ToString();
student.userRole = studentReader["UserRole"].ToString();
student.UserId = (int)studentReader["UserId"];
student.StudentLevel = (int)studentReader["SkillLevel"];
student.ClassID = (int)studentReader["ClassId"];
return(student);
}
else
{
return(null);
}
}
else
{
return(null);
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
connection.Close();
}
}
public static bool AddUser(string sql)
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
cmd.CommandText += sql;
cmd.Connection = MathWizzDB.GetConnection();
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Connection.Close();
return(true);
}
catch
{
return(false);
}
}
}
// We will need to change the class ID it is set to 0 now since we do not have this set up yet.
public static bool AddToStudentInfo(string commandText)
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
cmd.CommandText += commandText;
cmd.Connection = MathWizzDB.GetConnection();
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Connection.Close();
return(true);
}
catch (SqlException ex)
{
throw ex;
}
}
}
public static List <ActivityHistory> GetActivityHistory(int studentId)
{
var history = new List <ActivityHistory>();
SqlConnection connection = MathWizzDB.GetConnection();
string selectStatement = " SELECT DateTime " +
", TotalQuestions, CorrectAnswers, SkillLevel, ActivityType FROM ActivityHistory " +
" WHERE (StudentId = @studentId) ";
SqlCommand selectCommand = new SqlCommand(selectStatement, connection);
selectCommand.Parameters.AddWithValue("@studentId", studentId);
try
{
connection.Open();
using (SqlDataReader studentReader = selectCommand.ExecuteReader())
{
while (studentReader.Read())
{
ActivityHistory activity = new ActivityHistory();
activity.DateTime = (DateTime)studentReader["DateTime"];
activity.NumberOfQuestions = (int)studentReader["TotalQuestions"];
activity.NumberOfCorrectAnswers = (int)studentReader["CorrectAnswers"];
activity.SkillLevel = (int)studentReader["SkillLevel"];
activity.ActivityType = studentReader["ActivityType"].ToString();
history.Add(activity);
// return activity;
}
;
};
}
catch (Exception ex)
{
throw ex;
}
finally
{
connection.Close();
}
return(history);
}
public static SkillLevel GetSkillLevel(int skillLevel)
{
SqlConnection connection = MathWizzDB.GetConnection();
string selectStatement = "SELECT SkillLevel.SkillLevel, NumberOfDigits, NumberOfDecimalPlaces, MathOperator, MinValue, MaxValue" +
" FROM SkillLevel " +
"WHERE SkillLevel = @skillLevel";
SqlCommand selectCommand = new SqlCommand(selectStatement, connection);
selectCommand.Parameters.AddWithValue("@skillLevel", skillLevel);
try
{
connection.Open();
SqlDataReader skillReader = selectCommand.ExecuteReader();
if (skillReader.Read())
{
SkillLevel skLevel = new SkillLevel();
skLevel.SkillLevelID = (int)skillReader["SkillLevel"];
skLevel.NumberOfDigits = (int)skillReader["NumberOfDigits"];
skLevel.NumberOfDecimalPlaces = (int)skillReader["NumberOfDecimalPlaces"];
skLevel.MinValue = (int)skillReader["MinValue"];
skLevel.MaxValue = (int)skillReader["MaxValue"];
skLevel.MathOperator = skillReader["MathOperator"].ToString();
return(skLevel);
}
else
{
return(null);
}
} catch (SqlException ex)
{
throw ex;
} finally
{
connection.Close();
}
}
public static Student GetStudentById(int studentId)
{
SqlConnection connection = MathWizzDB.GetConnection();
string selectStatement = "SELECT SkillLevel, ClassId, UserId, FirstName, LastName, UserRole" +
" from Users INNER JOIN StudentInfo ON Users.UserId = StudentInfo.StudentId WHERE UserId = @StudentId";
SqlCommand selectCommand = new SqlCommand(selectStatement, connection);
selectCommand.Parameters.AddWithValue("@StudentId", studentId);
try
{
connection.Open();
SqlDataReader studentReader = selectCommand.ExecuteReader();
if (studentReader.Read())
{
Student student = new Student();
student.StudentLevel = (int)studentReader["SkillLevel"];
student.ClassID = (int)studentReader["ClassId"];
student.UserId = (int)studentReader["UserId"];
student.FirstName = studentReader["FirstName"].ToString();
student.LastName = studentReader["LastName"].ToString();
student.UserRole = studentReader["UserRole"].ToString();
return(student);
}
else
{
return(null);
}
}
catch (SqlException ex)
{
throw ex;
}
finally
{
connection.Close();
}
}
public static Person GetUserByUserId(string userId)
{
SqlConnection connection = MathWizzDB.GetConnection();
string sqlState = "Select LastName, FirstName, UserRole from Users where UserId = @userId";
SqlCommand cmd = new SqlCommand(sqlState, connection);
cmd.Parameters.AddWithValue("UserId", userId);
try
{
connection.Open();
SqlDataReader userReader = cmd.ExecuteReader();
if (userReader.Read())
{
Person person = new Person();
person.FirstName = userReader["FirstName"].ToString();
person.LastName = userReader["LastName"].ToString();
person.UserRole = userReader["UserRole"].ToString();
return(person);
}
else
{
return(null);
}
}
catch (SqlException ex)
{
throw ex;
}
finally
{
connection.Close();
}
}