Question

我需要为POP-UP窗口设置焦点，以便屏幕阅读器两次读取错误消息。

if (Convert.ToDateTime(txtFromDate.Text.Trim()).DayOfWeek != DayOfWeek.Monday)
{
  ScriptManager.RegisterStartupScript(this, this.GetType(), "PopUp", "alert('Previous week start date should be a Monday !');", true);
  return;
}

Answer 1

您可以使用以下代码重新加载。将以下脚本添加到aspx页面。然后，在您的代码隐藏中调用函数showAlert()而不是原始的启动脚本。

代码隐藏

if (Convert.ToDateTime(txtFromDate.Text.Trim()).DayOfWeek != DayOfWeek.Monday)
{
  ScriptManager.RegisterStartupScript(this, this.GetType(), "PopUp", "showAlert()", true);
  return;
}

JavaScript

<script>
function showAlert() {
alert('Previous week start date should be a Monday !');

if (getCookie("reloadPage") === "2" || getCookie("reloadPage") === "")
    {
        setCookie("reloadPage", "1",1);//create a persistent cookie
        window.location.reload(true);
    } else if(getCookie("reloadPage") === "1") {
        setCookie("reloadPage", "2",1);//create a persistent cookie
    }
}

function setCookie(cname, cvalue, exdays) {
    try {
        var d = new Date();
        d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
        var expires = "expires=" + d.toUTCString();
        document.cookie = cname + "=" + cvalue + "; " + expires + ";path=/";
    } catch (e) { }
}

function getCookie(cname) {
    try {
        var name = cname + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') c = c.substring(1);
            if (c.indexOf(name) == 0) return c.substring(name.length, c.length);
        }
    } catch (e) { }
    return "";
}
</script>

如何设置弹出错误消息的焦点？

1 个答案: