从$ C $传递值c-背后的Javascript [英] Passing value from code-behind to Javascript

问题描述

我使用的是jQueryUI的进度向用户展示他们已经多少让文件存储使用。百分比计算code-后面应该传递给Javascript的。

I am using a jQueryUI ProgressBar to show users how much allowed file storage they have used. The percentage is calculated in code-behind and should be passed to Javascript.

在.aspx code

    <asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
        <script type="text/javascript">
            $(function () {
                var pct = document.getElementById("filesPercentage").value;
                $("#progressbar").progressbar({
                    value: pct
                });
            });
        </script>
    </asp:Content>

    <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
      ...
     <input type="hidden" runat="server" id="filesPercentage" />                      
     <div id="progressbar"></div>         
      ...
    </asp:Content>

code背后

protected void Page_Load(object sender, EventArgs e)
{
   filesPercentage.Value = "85";
}

现在看来似乎不能从隐藏字段的百分比数。任何帮助将是AP preciated。

It seems like it can't get the percentage number from the hidden field. Any help would be appreciated.

推荐答案

因为你的隐藏字段是一个服务器控件这可能是因为该ID是如何产生比 filesPercentage （大概就像 ctl00_ctl00_filesPercentage ）

since your hidden field is a server control it could be that the ID is getting generated to something other than filesPercentage (probably something like ctl00_ctl00_filesPercentage)

• 您可能需要将生成的客户端ID适用于您的JavaScript 的document.getElementById（＆LT;％= filesPercentage.ClientID％＆gt;中）。值;
• 或者使用选择隐藏值，例如 $的另一种方式（[隐藏的父元素]输入[类型=隐藏]）。VAL（）

• You may need to apply the generated client ID to your javascript document.getElementById("<%=filesPercentage.ClientID%>").value;
• Or use another way of selecting the hidden value, such as $('[hidden's parent element] input[type="hidden"]').val()

此外，它看起来像进度值期待一个号码，所以你可能需要做值：厘* 1 或值形式：parseInt（ PCT）

additionally, it looks like progressbar value is expecting a number, so you may need to do value: pct * 1 or value: parseInt(pct)

http://jsfiddle.net/pxfunc/QyZSs/

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