public void NewBlankStudent(object sender, RoutedEventArgs e)
{
if (StudentList.Count > 0 && StudentList.ElementAt(0).DisplayString == "<New Student>")
{
MessageBox.Show("Only one \"New Student\" record can be open at a time. \nPlease use or cancel the current New Student record.",
"Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
Student newStudent = new Student();
newStudent.DisplayString = "<New Student>";
StudentList.Add(newStudent);
StudentList.Sort(delegate(Student s1, Student s2) { return s1.LastName.CompareTo(s2.LastName); });
windowRef.listStudents.Items.Refresh();
windowRef.listStudents.SelectedIndex = 0;
windowRef.listStudents.ScrollIntoView(windowRef.listStudents.SelectedItem);
windowRef.RibbonButtonCancelNew.Visibility = Visibility.Visible;
}
/// <summary>
/// Event responder for student selection events from the UI. Re-populates selected tab.
/// </summary>
/// <param name="sender">Re-pass sender from original event handler.</param>
/// <param name="e">Re-pass e from original event handler.</param>
public void selectedStudentChanged(object sender, SelectionChangedEventArgs e)
{
if (PromptForSaveChanges)
{
MessageBoxResult result = MessageBox.Show("Save changes to student?", "Save Changes", MessageBoxButton.YesNoCancel);
if (result == MessageBoxResult.Yes)
{
//FIXME: Need SQL code/dbConn method to update tables here
}
else if (result == MessageBoxResult.Cancel)
return;
}
//Populate selected tab
PopulatedTabs = new List<int>();
this.SelectedStudent = windowRef.listStudents.SelectedItem as Student;
UpdateTabForNewStudent();
PromptForSaveChanges = false;
}
public bool SaveStudentRecord(Student updatedStudent)
{
try { Open(); }
catch { MessageBox.Show("Save failed"); return false; }
try
{
string sqlString1 = "SELECT * FROM StudentInfo"; // Select StudentInfo table
string sqlString2 = "SELECT * FROM Grades"; // Select Grades table
string sqlString3 = "SELECT * FROM StudentStats"; // Select StudentStats table
string query = ""; // Blank string used for UPDATE queries
// Full select: (StudentInfo left join StudentStats on StudentInfo.studentID = StudentStats.studentID) left join Grades on StudentInfo.studentID = Grades.studentID"
SqlDataAdapter dbAdpt = new SqlDataAdapter(sqlString1, dbConn); //Data adapter
SqlCommandBuilder builder = new SqlCommandBuilder(dbAdpt); // Command builder
DataSet ds = new DataSet();
dbAdpt.Fill(ds, "StudentInfo");
dbAdpt = new SqlDataAdapter(sqlString2, dbConn);
dbAdpt.Fill(ds, "Grades");
dbAdpt = new SqlDataAdapter(sqlString3, dbConn);
dbAdpt.Fill(ds, "StudentStats");
foreach (DataTable tables in ds.Tables)
{
query = ""; // Clear string
query = "UPDATE " + tables.TableName + " SET ";
// LOOP START
query += (tables.Columns[2].ColumnName + "='" + testStud(tables.Columns[2].ColumnName) + "',");
query += (tables.Columns[3].ColumnName + "='" + testStud(tables.Columns[3].ColumnName) + "'");
// LOOP END
/* The LOOP
foreach (DataColumn column in table.Columns)
{
query += ((column.ColumnName) + "='" + studentReq(column.ColumnName) + "',");
}
*/
query += " WHERE studentID ='" + updatedStudent.StudentID + "'";
Console.Write(query + "\n"); // Output to console for debugging purposes
// UNCOMMENT THESE TWO LINES TO EXECUTE!
//SqlCommand cmd = new SqlCommand(query, dbConn); // Command to execute sql.
//cmd.ExecuteReader(); //
}
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
return false;
}
try { Close(); return true; }
catch { MessageBox.Show("Save failed"); return false; }
// RIGHT HERE
// MessageBox.Show("DBController has " + updatedStudent.DisplayString);
// return false; //FIXME
}
/// <summary>
/// Event responder for student selection events from the UI. Re-populates selected tab.
/// </summary>
/// <param name="sender">Re-pass sender from original event handler.</param>
/// <param name="e">Re-pass e from original event handler.</param>
public void selectedStudentChanged(object sender, SelectionChangedEventArgs e)
{
if (PromptForSaveChanges)
{
MessageBoxResult result = MessageBox.Show("Save changes to " +
SelectedStudent.DisplayString + " (Student ID: " +
SelectedStudent.StudentID + ")?", "Save Changes",
MessageBoxButton.YesNoCancel, MessageBoxImage.Question);
if (result == MessageBoxResult.Yes)
{
SaveModifiedRecord(null, null);
}
else if (result == MessageBoxResult.Cancel)
return;
}
//Populate selected tab
PopulatedTabs = new List<int>();
this.SelectedStudent = windowRef.listStudents.SelectedItem as Student;
UpdateTabForNewStudent();
PromptForSaveChanges = false;
}
