private void comboBox1_DropDown(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count == 1)
{
DataTable dt = new DataTable();
dt = lc.getBookAssigned(Convert.ToInt32(dataGridView1.SelectedCells[0].Value));
comboBox1.DataSource = dt;
comboBox1.ValueMember = dt.Columns[0].ToString();
comboBox1.DisplayMember = dt.Columns[1].ToString();
comboBox1.Text = "";
}
else
{
MessageBox.Show("Please Select any Customer First", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
