private void btnRemoveSelected_Click(object sender, EventArgs e)
{
int[] recordsToDelete = RowsOfCheckboxesSelected();
if (recordsToDelete.Length is 0)
{
return;
}
DialogResult confirmation;
string name = null;
if (recordsToDelete.Length is 1)
{
name = $"{dataGridView1.Rows[recordsToDelete[0]].Cells[2].Value} {dataGridView1.Rows[recordsToDelete[0]].Cells[3].Value}";
confirmation = MessageBox.Show($"Are you sure you want to delete {name} from the roster?", "Before we take action...", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
}
else
{
confirmation = MessageBox.Show($"Are you sure you want to delete these {recordsToDelete.Length} students from the roster?", "Before we take action...", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
}
if (confirmation is DialogResult.Yes)
{
DataGridViewRow nextRow;
uint keyFromNextRow;
for (int i = 0; i < recordsToDelete.Length; i++)
{
nextRow = dataGridView1.Rows[recordsToDelete[i]];
keyFromNextRow = uint.Parse(nextRow.Cells[1].Value.ToString());
studentHashTable.Remove(keyFromNextRow);
}
if (recordsToDelete.Length is 1)
{
MessageBox.Show($"{name} has deleted from the roster.", "Confirmation", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show($"{recordsToDelete.Length} students have been deleted from the roster.", "Confirmation", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
dataGridView1.DataSource = studentHashTable.DataForDisplay().OrderBy(pupil => pupil.ID).ToArray();
}
}
private void btnSearch_Click(object sender, EventArgs e)
{
switch (cmbBxKeySelect.SelectedIndex)
{
case 0: //Search by student ID
if (IDValidator())
{
uint keyOfSearchedItem = uint.Parse(txtBxID.Text);
searchResults = new Student[1] {
currentRoster.DataForDisplay().FirstOrDefault(pupil => pupil.ID == keyOfSearchedItem)
};
if (searchResults[0] is null)
{
MessageBox.Show(@"Sorry, there isn't any record with that ID #. Please double check and try again.",
"No Match Found", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
dataGridView1.DataSource = searchResults;
if (searchResults[0] != null)
{
txtBxID.Clear();
}
}
break;
case 1: //Search by full name
if (FullNameValidator())
{
string first = txtBxFirstName.Text.ToLower(),
last = txtBxLastName.Text.ToLower();
searchResults = currentRoster.DataForDisplay()
.Where(pupil => pupil.FirstName.ToLower() == first && pupil.LastName.ToLower() == last)
.ToArray();
if (searchResults.Length is 0)
{
MessageBox.Show(@"Sorry, there isn't any record with that full name. Please double check and try again.",
"No Match Found", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else if (searchResults.Length > 1)
{
MessageBox.Show($"The {searchResults.Length} students named {txtBxFirstName.Text.Trim() + " " + txtBxLastName.Text.Trim()} will be displayed in the table.",
"Multiple Students Found", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
dataGridView1.DataSource = searchResults;
if (searchResults.Length != 0)
{
txtBxFirstName.Clear();
txtBxLastName.Clear();
}
}
break;
default: //Nothing was selected
return;
}
}
public RemoveForm(StudentHashTable theRoster)
{
InitializeComponent();
studentHashTable = theRoster;
theDataSource = studentHashTable.DataForDisplay().OrderBy(pupil => pupil.ID).ToArray();
}
private void DisplayForm_Load(object sender, EventArgs e)
{
dataGridView1.DataSource = currentRoster.DataForDisplay().OrderBy(pupil => pupil.ID).ToArray();
oldColumn = 1;
searchResults = new Student[0];
sortAscending = new bool[6];
sortAscending[0] = true;
for (int i = 1; i < sortAscending.Length; i++)
{
sortAscending[i] = false;
}
}