protected void b1_Click(object sender, EventArgs e) { String name = lblAdminname.Text; String pass = tblPassword.Text; DataTable dt = bla.Check(name, pass); if (dt.Rows.Count > 0) { Response.Redirect("ManagePhoneManufacturer.aspx"); } else { Response.Write("<script>alert('incorrect username or password')</script>"); } }