我有 ac# asp.net 3.5 应用程序 我试图在某个事件之后从代码后面打开一个窗口。我有这个，但它不工作，萤火虫没有错误

protected override void OnPreRender(EventArgs e) {
            base.OnPreRender(e);
            if (openCredentialsWindow) {
                if (openCredentialsWindow_ClientId != Guid.Empty) {
                    this.Page.ClientScript.RegisterStartupScript(this.GetType(), "openCredentials", string.Format("radopen('Services.aspx?clientId={0}, Window_Services')", openCredentialsWindow_ClientId.ToString()));
                }
            }
        }

有任何想法吗？