private void DataGridView1_MouseClick(object sender, MouseEventArgs e)
{
string id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString();
expendituredb idb = new expendituredb();
idb.get(Int32.Parse(id));
textBox1.Text = idb.name;
textBox2.Text = idb.amount;
dateTimePicker1.Text = idb.date;
textBox3.Text = idb.expentidure;
}