private void lstStudent_SelectedIndexChanged(object sender, EventArgs e)
{
int index = lstStudent.SelectedIndex - 2;
if (lstStudent.SelectedIndex == -1)
{
clearUserInput();
return;
}
if (index < 0 || index >= mStudents.Count)
{
ShowMessage("Please select a valid student.");
lstStudent.SelectedIndex = -1;
return;
}
clsStudent temp = (clsStudent)mStudents[index];
txtStudentID.Text = temp.UnivID.ToString();
txtFirstName.Text = temp.FirstName;
txtLastName.Text = temp.LastName;
txtSchool.Text = temp.Street;
txtCity.Text = temp.City;
txtState.Text = temp.State;
txtZip.Text = temp.Zip.ToString();
try
{
openDatabaseConnection();
mDB.Open();
string sql = "SELECT University.ID, UniversityName "
+ "FROM StudentInfo, StudentUniversity, University "
+ "WHERE StudentInfo.UnivID = StudentUniversity.StudentID "
+ "AND University.ID = studentUniversity.UniversityID "
+ "AND StudentInfo.UnivID = " + clsSQL.ToSql(temp.UnivID) + ";";
OleDbCommand cmd = new OleDbCommand(sql, mDB);
OleDbDataReader rdr = cmd.ExecuteReader();
rdr.Read();
rdr.Close();
}
catch (Exception ex)
{
ShowMessage("There was an unexpected error: " + ex.Message);
}
finally
{
closeDatabaseConnection();
}
}
private void LoadDBTable(string sql)
{
if (mUserFile == null)
{
ShowMessage("Please select a valid file.");
return;
}
try
{
mStudents.Clear();
openDatabaseConnection();
mDB.Open();
OleDbCommand cmd = new OleDbCommand(sql, mDB);;
OleDbDataReader rdr = cmd.ExecuteReader();
while (rdr.Read() == true)
{
clsStudent tempRecord = new clsStudent(
(int)rdr["StudentID"],
(string)rdr["LastName"],
(string)rdr["FirstName"],
(string)rdr["School"],
(string)rdr["City"],
(string)rdr["State"],
(int)rdr["Zip"]);
mStudents.Add(tempRecord);
}
rdr.Close();
}
catch (Exception ex)
{
ShowMessage("There was an unexpected error: " + ex);
}
finally
{
closeDatabaseConnection();
}
}