private void btnRemoveStudentFromGroup_Click(object sender, EventArgs e)
{
try
{
if (studentsDataGridView.CurrentRow.IsNewRow)
{
throw new ArgumentOutOfRangeException("You cannot delete non-existant group student from this group!");
}
int rowIndex = studentsDataGridView.SelectedCells[0].RowIndex;
int studentID = int.Parse(studentsDataGridView["Student_ID", rowIndex].EditedFormattedValue.ToString());
int groupID = int.Parse(studentsDataGridView["Group_ID", rowIndex].EditedFormattedValue.ToString());
if (MessageBox.Show(string.Format("Do you really want to delete student {0} {1} from group #{2}?",
studentsDataGridView["Last_name", rowIndex].EditedFormattedValue.ToString(),
studentsDataGridView["First_name", rowIndex].EditedFormattedValue.ToString(),
groupID), "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2)
== System.Windows.Forms.DialogResult.Yes)
{
GroupDAL.RemoveStudentFromGroup(groupID, studentID);
studentsDataGridView.Rows.RemoveAt(rowIndex);
MessageBox.Show("Student successfully removed from the group!", "Notification", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
catch (NullReferenceException)
{
MessageBox.Show("Maybe, you haven't selected a student?", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
