Question

我正在使用ajax工具包日历扩展程序控件

在日历中，我想只在星期五展示我不想在其他日子里放映。非常感谢任何帮助。

我试过这个。

<script type="text/javascript">
    function checkdate(txt) {
        var seldate = document.getElementById("txtDate")
        var selectedDate = new Date(seldate.value);
        var today = new Date();
        var weekday = new Array(7);
        weekday[0] = "Sunday";
        weekday[1] = "Monday";
        weekday[2] = "Tuesday";
        weekday[3] = "Wednesday";
        weekday[4] = "Thursday";
        weekday[5] = "Friday";
        weekday[6] = "Saturday"
        if (selectedDate != weekday[5]) {
            alert('Select Friday only !');
            var a = document.getElementById("txtDate");
            a.value = " ";
        } else {
            if (selectedDate == weekday[5]) {
                var a = document.getElementById("txtDate");
                a.value = selectedDate;
            }           
        }
    }

</script>

 <asp:TextBox ID="txtDate" Enabled="true" runat="server" Width="200px" onchange="checkdate(this);"></asp:TextBox>

<ajaxtK:CalendarExtender ID="calext" runat="server" TargetControlID="txtDate" ></ajaxtK:CalendarExtender>

Answer 1

为了获取asp.net元素的客户端元素ID，您需要使用ClientID属性，如下所示：

<script type="text/javascript">
    function checkdate(txt) {
        var seldate = document.getElementById("<%= txtDate.ClientID %>")
        var selectedDate = new Date(seldate.value);
        var today = new Date();
        var weekday = new Array(7);
        weekday[0] = "Sunday";
        weekday[1] = "Monday";
        weekday[2] = "Tuesday";
        weekday[3] = "Wednesday";
        weekday[4] = "Thursday";
        weekday[5] = "Friday";
        weekday[6] = "Saturday"
        if (selectedDate.getDay() != weekday[5]) { //add getDay()
            alert('Select Friday only !');
            var a = document.getElementById("<%= txtDate.ClientID %>");
            a.value = " ";
        } else {
            var a = document.getElementById("<%= txtDate.ClientID %>");
            a.value = selectedDate;
        }
    }

</script>

 <asp:TextBox ID="txtDate" Enabled="true" runat="server" Width="200px" onchange="checkdate(this);"></asp:TextBox>

<ajaxtK:CalendarExtender ID="calext" runat="server" TargetControlID="txtDate" ></ajaxtK:CalendarExtender>

Answer 2

您正在使用文本框的错误标识符来获取值和要从日期对象中获取日期，您必须调用getDay（）函数.. 使用下面的功能它会起作用....

function checkdate() {
        var seldate = document.getElementById("<%= txtDate.ClientID %>")
        var selectedDate = new Date(seldate.value);
        var today = new Date();
        var weekday = new Array(7);
        weekday[0] = "Sunday";
        weekday[1] = "Monday";
        weekday[2] = "Tuesday";
        weekday[3] = "Wednesday";
        weekday[4] = "Thursday";
        weekday[5] = "Friday";
        weekday[6] = "Saturday"
        if (weekday[selectedDate.getDay()] != weekday[5]) {
            alert('Select Friday only !');
            var a = document.getElementById("<%= txtDate.ClientID %>");
            a.value = " ";
        } else {

                alert('Great , you have selected Friday!');
                var a = document.getElementById("<%= txtDate.ClientID %>");
                a.value = selectedDate;

        }
    }

每次只显示选择星期五

2 个答案: