private void buttonDelete_Click(object sender, EventArgs e)
{
try {
if (int.Parse(number) != 0)
{
DialogResult dr = MessageBox.Show("Confirm to delete?", "Tips", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
if (dr == DialogResult.OK)
{
int n = uiDataGridView1.SelectedRows.Count;
using BookController bookMapper = new BookController();
int deleteNum = 0;
for (int i = 0; i < n; ++i)
{
if (bookMapper.DeleteById(uiDataGridView1.SelectedRows[i].Cells[0].Value.ToString()) != 0)
{
++deleteNum;
MessageBox.Show($"Successful to delete: {uiDataGridView1.SelectedRows[i].Cells[1].Value.ToString()}");
}
else
{
MessageBox.Show($"Failed to delete: {uiDataGridView1.SelectedRows[i].Cells[1].Value.ToString()}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
MessageBox.Show($"Successful to delete {deleteNum} pieces of infomation");
Table();
}
}
else
{
DialogResult dr = MessageBox.Show("Confirm to delete? The book has been borrowed and its owner has not lend it back!", "Tips", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
if (dr == DialogResult.OK)
{
int n = uiDataGridView1.SelectedRows.Count;
using BookController bookMapper = new BookController();
int deleteNum = 0;
for (int i = 0; i < n; ++i)
{
if (bookMapper.DeleteById(uiDataGridView1.SelectedRows[i].Cells[0].Value.ToString()) != 0)
{
++deleteNum;
MessageBox.Show($"Successful to delete: {uiDataGridView1.SelectedRows[i].Cells[1].Value.ToString()}");
}
else
{
MessageBox.Show($"Failed to delete: {uiDataGridView1.SelectedRows[i].Cells[1].Value.ToString()}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
MessageBox.Show($"Successful to delete {deleteNum} pieces of infomation");
Table();
}
}
}
catch {
MessageBox.Show("Please select a book to delete", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}