Question

我想在ASP Web表单中将一串数据从C＃传输到JavaScript。我的方法是在C＃中将数据设置为ASP标签的文本，然后在JS中按ID获取标签的文本。

C＃代码（ascx.cs文件）：

    List<Event> eventList;

    protected void Page_Load(object sender, EventArgs e)
    {
        string message = string.Empty;
        SPSite franasabank = new SPSite("http://lbshrptweb/sites/fransabank/");
        SPWeb calendar = franasabank.OpenWeb();
        SPList list = calendar.Lists["Fransabank Calendar"];
        eventList = new List<Event>();
        foreach (SPListItem oItem in list.Items)
        {
            // Access each item in the list...  
            DateTime startTime = (DateTime)oItem["Start Time"];
            DateTime endTime = (DateTime)oItem["End Time"];
            string status = (String)oItem["Status"];
            string title = oItem.Title;
            string description = (String)oItem["Description"];
            Event calendar_event = new Event(startTime, endTime, status, title, description);
            eventList.Add(calendar_event);
        }
        foreach (Event item in eventList)
        {
            message += item.Title + " " + item.Description + item.StartDate + "-" + item.EndDate + "-" + item.Status + "\n";
        }

        Label1.Text = message;
    }

HTML代码段显示标签（ascx文件）：

<div data-ng-app="Calendar">
   <div data-ng-controller="CalendarController" id="mycontroller">
     <div class="row " data-ng-init="Initialize()">
        <asp:Label ID="Label1" runat="server" Text="Label" ></asp:Label>

JavaScript代码：

<script>
    var a = document.getElementById('<%= Label1.ClientID %>');
    console.log(a);
</script>

我在变量'a'中收到数据为null。我试过了

var a = document.getElementById('<%= Label1.ClientID %>').innerHTML;

但它也是空的

Answer 1

听起来像Javascript在加载标签之前运行

将js放在页面上的<asp:Label>之后。最好在</body>之前：

    <script>
        var a = document.getElementById('<%= Label1.ClientID %>');
        console.log(a);
    </script>
</body>

或者，您可以使用jQuery $(document).ready()包围代码块：

<script>
    $(document).ready(function () {
        var a = document.getElementById('<%= Label1.ClientID %>');
        console.log(a);
    });
</script>

在JavaScript中获取ASP.NET标签的文本或值

1 个答案: