// Delete the selected student.
private void Button_Delete_Click(object sender, EventArgs e)
{
IssueBook issueBook = new IssueBook();
if (MessageBox.Show("Are you sure, you want to delete the student?",
"Delete Student",
MessageBoxButtons.OKCancel,
MessageBoxIcon.Warning) == DialogResult.OK)
{
if (!issueBook.HasStudentIssuedBooks(this.currentStudentNo, out string errorMessage))
{
if (issueBook.DeleteStudentRecordsFromIssueReturnBook(this.currentStudentNo, out errorMessage))
{
if (this.student.DeleteStudent(this.currentStudentNo, out errorMessage))
{
MessageBox.Show(errorMessage,
"Delete Student",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
FillDataGridView();
}
else
{
MessageBox.Show(errorMessage,
"Delete Student",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show(errorMessage,
"Delete Student",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show(errorMessage,
"Delete Student",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
}
