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; }