protected void Button1_Click(object sender, EventArgs e)
{
PatientBO patientbo = new PatientBO();
GridView1.VirtualItemCount = patientbo.Count(x => x.HealthCardNo.Contains(TextBox1.Text.Trim()));
GridView1.DataSource = patientbo.Find(x => x.HealthCardNo.Contains(TextBox1.Text.Trim()), 0, GridView1.PageSize)
.ToList();
GridView1.DataBind();
Button1.Enabled = true;
}