CascadingDropDown 错误 - “选项” 为 null 或不是对象

发布于 2024-07-14 12:11:51 字数 658 浏览 11 评论 0原文

我有五个与 CascadingDropDown AJAX 控件链接在一起的 DropDownList。当它在本地运行时，它们工作得很好。然而，当通过互联网在生产服务器上运行时，每次选择一个新项目时，我都会收到此错误：

'options' is null or not an object

调试此显示导致该错误的函数（它是来自 CascadingDropDown 控件的 JS）：

_clearItems : function() {
    /// <summary>
    /// Clear the items from the drop down
    /// </summary>
    /// <returns />

    var e = this.get_element();
    while (0 < e.options.length) {
        e.remove(0);
    }
},

有人有吗关于为什么要这样做有什么想法吗？我怀疑这是因为通过互联网加载项目需要更长的时间，并且这会以某种方式影响控制？

我正在运行.NET 3.5。

提前致谢。

原文

I have five DropDownLists linked together with the CascadingDropDown AJAX control. When it's running locally, they work fine. However when running on the production server over the internet, I get this error every time I select a new item:

'options' is null or not an object

Debugging this shows the function that's causing it (it's JS from the CascadingDropDown control):

_clearItems : function() {
    /// <summary>
    /// Clear the items from the drop down
    /// </summary>
    /// <returns />

    var e = this.get_element();
    while (0 < e.options.length) {
        e.remove(0);
    }
},

Does anyone have any ideas as to why it's doing this? I suspect it's because it takes longer to load the items over the internet and somehow this is affect the control?

I'm running .NET 3.5.

Thanks in advance.

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