private void button3_Click(object sender, EventArgs e)
{
btc = new BloodTranfuseController();
dataGridView1.DataSource = null;
dataGridView1.DataSource = btc.SearchID(textBox1.Text).Tables[0];
}
private void BloodTransfusion_Load(object sender, EventArgs e)
{
btc = new BloodTranfuseController();
dataGridView1.DataSource = btc.AllTransfusion().Tables[0];
}